RSD Series: DC-DC Railway Converter

80 products

MEAN WELL RSD Series Railway DC-DC Converters

MEAN WELL RSD Series Railway DC-DC Converters

  • Product Features
  • Technical Specifications
  • Series Power Range
  • Application Suitability

Product Features

The RSD series is designed for mission-critical environments. Featuring a compact, enclosed, and fanless design, these converters provide the reliability needed for rolling stock, automotive, and harsh industrial machinery.

  • Railway Standard Compliance: Fully compliant with EN50155 and EN45545-2 standards for shock, vibration, and fire safety.
  • Wide Input Range: Features a 4:1 wide input range, ensuring stable output even during significant DC bus fluctuations.
  • Reinforced Isolation: Offers 4KVDC I/O isolation to ensure maximum safety between input and output circuits.
  • Fanless Design: Conduction-cooled for operation in ambient temperatures up to 70°C, increasing reliability by eliminating maintenance-prone fans.
  • Comprehensive Protection: Integrated protection suite including Short Circuit, Overload, Over Voltage, and Over Temperature protection.

Technical Specifications

Parameter Specification Detail
Isolation 4KVDC I/O isolation
Operating Temp. -40°C to +70°C (Refer to derating)
Shock/Vibration Compliant with EN50155 (Railway)
Input Range 4:1 Wide input range
Safety Standards IEC 62368-1, EN 50155, EN 45545-2

Series Power Range Overview

Model Series Power Output Core Characteristics
RSD-30 30W Ultra-compact, 4:1 Input
RSD-60 60W Slim design, 4:1 Input
RSD-100 100W Slim design, 4:1 Input
RSD-150 150W High density, 4:1 Input
RSD-200 200W High reliability, 2:1 Input
RSD-300 300W High power, 2:1 Input
RSD-500 500W High power, 2:1 Input
Typical Input Voltages: Available in ranges covering 9V-36V, 18V-72V, and 40V-160V, making them suitable for 12V, 24V, 48V, 72V, 96V, and 110V DC systems.

Application Suitability

The RSD series is specifically built for transport and heavy-duty industrial platforms.

Application Area Reasoning
Rolling Stock Meets EN50155 standards for vibration/shock; provides stable power for passenger information systems.
Bus/Automotive Handles battery voltage fluctuations during engine startup and varying load demands.
Industrial/Isolation 4KVDC isolation prevents ground loops and protects sensitive PLC or sensor equipment.
Selection Tip: When choosing an RSD model, match the "Input Voltage Range" (e.g., 18-72V) to your system’s nominal battery voltage. Always allow for a 20% power headroom above your total load consumption to ensure the longest lifespan of the unit.
  • RSD-500D-48

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500D-48

    The MEAN WELL RSD-500D-48 is a fanless railway DC/DC converter with a 48 V output rated at 10.4 A and 499.2 W. Its D-code input supports continuous operation from 67.2–154 VDC and a separate 1-second input range of 57.6–67.2 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500D-48 Series RSD-500 Input version D; nominal test input 110 VDC DC output voltage 48 V Rated output current 10.4 A Rated output power 499.2 W Output current range 0–10.4 A Output voltage adjustment 48–56 V Maximum ripple and noise 150 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 67.2–154 VDC 1-second input range 57.6–67.2 VDC Typical efficiency 93% Typical DC input current 5 A at 110 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at full load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 57.6–65 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 2 × Conquer MST; time-lag; 10 A, 250 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥67.2 VDC Input undervoltage turn-off specification ≤65 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-500D-24

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500D-24

    The MEAN WELL RSD-500D-24 is a fanless railway DC/DC converter with a 24 V output rated at 20.8 A and 499.2 W. Its D-code input supports continuous operation from 67.2–154 VDC and a separate 1-second input range of 57.6–67.2 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500D-24 Series RSD-500 Input version D; nominal test input 110 VDC DC output voltage 24 V Rated output current 20.8 A Rated output power 499.2 W Output current range 0–20.8 A Output voltage adjustment 24–28 V Maximum ripple and noise 120 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 67.2–154 VDC 1-second input range 57.6–67.2 VDC Typical efficiency 93% Typical DC input current 5 A at 110 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at full load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 28.8–35 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 2 × Conquer MST; time-lag; 10 A, 250 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥67.2 VDC Input undervoltage turn-off specification ≤65 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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    $552.99

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  • RSD-500D-12

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500D-12

    The MEAN WELL RSD-500D-12 is a fanless railway DC/DC converter with a 12 V output rated at 35 A and 420 W. Its D-code input supports continuous operation from 67.2–154 VDC and a separate 1-second input range of 57.6–67.2 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500D-12 Series RSD-500 Input version D; nominal test input 110 VDC DC output voltage 12 V Rated output current 35 A Rated output power 420 W Output current range 0–35 A Output voltage adjustment 12–14 V Maximum ripple and noise 100 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 67.2–154 VDC 1-second input range 57.6–67.2 VDC Typical efficiency 93% Typical DC input current 5 A at 110 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at full load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 14.4–17.5 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 2 × Conquer MST; time-lag; 10 A, 250 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥67.2 VDC Input undervoltage turn-off specification ≤65 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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    $552.99

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  • RSD-500C-48

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500C-48

    The MEAN WELL RSD-500C-48 is a fanless railway DC/DC converter with a 48 V output rated at 9.6 A and 460.8 W. Its C-code input supports continuous operation from 33.6–67.2 VDC and a separate 1-second input range of 28.8–33.6 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500C-48 Series RSD-500 Input version C; nominal test input 48 VDC DC output voltage 48 V Rated output current 9.6 A Rated output power 460.8 W Output current range 0–9.6 A Output voltage adjustment 48–56 V Maximum ripple and noise 150 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 33.6–67.2 VDC 1-second input range 28.8–33.6 VDC Typical efficiency 93% Typical DC input current 11 A at 48 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 48 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at 70% load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 57.6–65 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 3 × Conquer MST; time-lag; 10 A, 250 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥33.6 VDC Input undervoltage turn-off specification ≤33 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-500C-24

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500C-24

    The MEAN WELL RSD-500C-24 is a fanless railway DC/DC converter with a 24 V output rated at 19.2 A and 460.8 W. Its C-code input supports continuous operation from 33.6–67.2 VDC and a separate 1-second input range of 28.8–33.6 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500C-24 Series RSD-500 Input version C; nominal test input 48 VDC DC output voltage 24 V Rated output current 19.2 A Rated output power 460.8 W Output current range 0–19.2 A Output voltage adjustment 24–28 V Maximum ripple and noise 120 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 33.6–67.2 VDC 1-second input range 28.8–33.6 VDC Typical efficiency 93% Typical DC input current 11 A at 48 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 48 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at 70% load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 28.8–35 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 3 × Conquer MST; time-lag; 10 A, 250 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥33.6 VDC Input undervoltage turn-off specification ≤33 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-500C-12

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500C-12

    The MEAN WELL RSD-500C-12 is a fanless railway DC/DC converter with a 12 V output rated at 35 A and 420 W. Its C-code input supports continuous operation from 33.6–67.2 VDC and a separate 1-second input range of 28.8–33.6 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500C-12 Series RSD-500 Input version C; nominal test input 48 VDC DC output voltage 12 V Rated output current 35 A Rated output power 420 W Output current range 0–35 A Output voltage adjustment 12–14 V Maximum ripple and noise 100 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 33.6–67.2 VDC 1-second input range 28.8–33.6 VDC Typical efficiency 93% Typical DC input current 11 A at 48 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 48 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at 70% load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 14.4–17.5 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 3 × Conquer MST; time-lag; 10 A, 250 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥33.6 VDC Input undervoltage turn-off specification ≤33 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-500B-48

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500B-48

    The MEAN WELL RSD-500B-48 is a fanless railway DC/DC converter with a 48 V output rated at 8.8 A and 422.4 W. Its B-code input supports continuous operation from 16.8–33.6 VDC and a separate 1-second input range of 14.4–16.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500B-48 Series RSD-500 Input version B; nominal test input 24 VDC DC output voltage 48 V Rated output current 8.8 A Rated output power 422.4 W Output current range 0–8.8 A Output voltage adjustment 48–56 V Maximum ripple and noise 150 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 16.8–33.6 VDC 1-second input range 14.4–16.8 VDC Typical efficiency 92% Typical DC input current 21.5 A at 24 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 24 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at 70% load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 57.6–65 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 2 × WALTER WN 20; time-lag; 20 A, 500 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥16.8 VDC Input undervoltage turn-off specification ≤16.5 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-500B-24

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500B-24

    The MEAN WELL RSD-500B-24 is a fanless railway DC/DC converter with a 24 V output rated at 17.5 A and 420 W. Its B-code input supports continuous operation from 16.8–33.6 VDC and a separate 1-second input range of 14.4–16.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500B-24 Series RSD-500 Input version B; nominal test input 24 VDC DC output voltage 24 V Rated output current 17.5 A Rated output power 420 W Output current range 0–17.5 A Output voltage adjustment 24–28 V Maximum ripple and noise 120 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 16.8–33.6 VDC 1-second input range 14.4–16.8 VDC Typical efficiency 92% Typical DC input current 21.5 A at 24 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 24 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at 70% load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 28.8–35 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 2 × WALTER WN 20; time-lag; 20 A, 500 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥16.8 VDC Input undervoltage turn-off specification ≤16.5 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-500B-12

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    MEAN WELL RSD-500 series: Railway DC/DC Converter - RSD-500B-12

    The MEAN WELL RSD-500B-12 is a fanless railway DC/DC converter with a 12 V output rated at 35 A and 420 W. Its B-code input supports continuous operation from 16.8–33.6 VDC and a separate 1-second input range of 14.4–16.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-500 Datasheet (PDF) The RSD-500 section is on PDF pages 52, 53, 54, 55, 56, 57, 58, 59. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-500B-12 Series RSD-500 Input version B; nominal test input 24 VDC DC output voltage 12 V Rated output current 35 A Rated output power 420 W Output current range 0–35 A Output voltage adjustment 12–14 V Maximum ripple and noise 100 mVp-p Voltage tolerance ±1.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. Adjust the output using the +Vo ADJ control and retain the specified current and power limits. Input, Timing and Measurement Conditions Continuous DC input range 16.8–33.6 VDC 1-second input range 14.4–16.8 VDC Typical efficiency 92% Typical DC input current 21.5 A at 24 VDC Typical inrush current 30 A Set-up / rise time 500 / 60 ms Normal measurement conditions 24 VDC input, rated load and 25°C ambient Supply interruption, S1 3 ms at full load; EN 50155:2021 Supply interruption, S2 10 ms at 70% load The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. Use the dedicated model hold-up-versus-load graph together with the S1 and S2 load conditions. The one-second low-input band does not establish a continuous reduced-input operating point; low-input operation may require load reduction. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 14.4–17.5 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; reapply input power to recover Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference 2 × WALTER WN 20; time-lag; 20 A, 500 V each Inrush limiting Start-up resistor bypassed by a relay after start-up Input undervoltage turn-on specification ≥16.8 VDC Input undervoltage turn-off specification ≤16.5 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator TB1 pin 1 DC input +Vin TB1 pin 2 DC input −Vin TB1 pin 3 FG TB2 pins 1, 2 DC output +Vo TB3 pins 3, 4 DC output −Vo LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +80°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; 90% at 60°C, 50% at 70°C and 30% at 80°C Additional heat-transfer plate 450 × 450 × 3 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 85°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C; 5–95% RH, non-condensing Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m; overvoltage category II Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance >100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 55035 with the listed IEC 61000-4 immunity tests Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The immunity table lists criterion A for all six tests: ESD level 3 at 8 kV air and 6 kV contact; radiated RF level 3 at 10 V/m; EFT/burst level 3 at 2 kV; surge level 3 at 1 kV line–line and 2 kV line–line–FG; conducted RF level 3 at 10 V; and magnetic field level 4 at 30 A/m. The emission table names BS EN / EN 61000-3-3 for voltage flicker, without a numerical test level; it does not list a harmonic-current standard or limit. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). The listed items are marked PASS at HL1, HL2 and HL3. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 237 × 100 × 41 mm Case reference 270C Drawing tolerance ±1 mm Mounting layout 229 mm longitudinal and 84 mm transverse mounting references; one Ø5.2 mm feature marked L = 6.6 mm and three Ø4.2 mm features marked L = 6 mm Iron-plate fixing arrangement One M5 and three M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1450 g Catalogue packing 1.45 kg; 10 units / 15.5 kg / 0.8 CUFT Minimum MTBF 834.7K hours, Telcordia SR-332 (Bellcore); 99.1K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 67 kHz Catalogue warranty 3 years The 41 mm body profile supports low-height equipment layouts. Keep terminal access and the +Vo ADJ control accessible after mounting. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300F-48

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300F-48

    The MEAN WELL RSD-300F-48 is a fanless railway DC/DC converter with a 48 V output rated at 6.3 A and 302.4 W. Its F-code input supports continuous operation from 50.4–93.6 VDC and a separate 1-second input range of 43.2–100.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300F-48 Series RSD-300 Input version F; nominal test input 72 VDC DC output voltage 48 V Rated output current 6.3 A Rated output power 302.4 W Output current range 0–6.3 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 180 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 50.4–93.6 VDC 1-second input range 43.2–100.8 VDC Typical efficiency 91.5% Typical DC input current 4.6 A at 72 VDC Typical inrush current 45 A at 72 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 72 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 55.2–64.8 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 10 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300F-24

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300F-24

    The MEAN WELL RSD-300F-24 is a fanless railway DC/DC converter with a 24 V output rated at 12.5 A and 300 W. Its F-code input supports continuous operation from 50.4–93.6 VDC and a separate 1-second input range of 43.2–100.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300F-24 Series RSD-300 Input version F; nominal test input 72 VDC DC output voltage 24 V Rated output current 12.5 A Rated output power 300 W Output current range 0–12.5 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 150 mVp-p Voltage tolerance ±2.0% Line regulation ±0.2% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 50.4–93.6 VDC 1-second input range 43.2–100.8 VDC Typical efficiency 91% Typical DC input current 4.6 A at 72 VDC Typical inrush current 45 A at 72 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 72 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 27.6–32.4 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 10 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Representative 24 V output undervoltage graph Turn-off approximately 39.1 VDC; turn-on approximately 41.8 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. The representative graph illustrates undervoltage hysteresis below the normal operating band; its plotted thresholds do not extend the permitted continuous input range. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300F-12

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300F-12

    The MEAN WELL RSD-300F-12 is a fanless railway DC/DC converter with a 12 V output rated at 25 A and 300 W. Its F-code input supports continuous operation from 50.4–93.6 VDC and a separate 1-second input range of 43.2–100.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300F-12 Series RSD-300 Input version F; nominal test input 72 VDC DC output voltage 12 V Rated output current 25 A Rated output power 300 W Output current range 0–25 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 120 mVp-p Voltage tolerance ±2.0% Line regulation ±0.3% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 50.4–93.6 VDC 1-second input range 43.2–100.8 VDC Typical efficiency 91% Typical DC input current 4.6 A at 72 VDC Typical inrush current 45 A at 72 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 72 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 13.8–16.2 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 10 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300F-5

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300F-5

    The MEAN WELL RSD-300F-5 is a fanless railway DC/DC converter with a 5 V output rated at 42 A and 210 W. Its F-code input supports continuous operation from 50.4–93.6 VDC and a separate 1-second input range of 43.2–100.8 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300F-5 Series RSD-300 Input version F; nominal test input 72 VDC DC output voltage 5 V Rated output current 42 A Rated output power 210 W Output current range 0–42 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 100 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 50.4–93.6 VDC 1-second input range 43.2–100.8 VDC Typical efficiency 89% Typical DC input current 3.25 A at 72 VDC Typical inrush current 45 A at 72 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 72 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 5.75–7 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 10 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1, 2 DC OUTPUT −V Output 3, 4 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300E-48

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300E-48

    The MEAN WELL RSD-300E-48 is a fanless railway DC/DC converter with a 48 V output rated at 6.3 A and 302.4 W. Its E-code input supports continuous operation from 25.2–46.8 VDC and a separate 1-second input range of 21.6–50.4 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300E-48 Series RSD-300 Input version E; nominal test input 36 VDC DC output voltage 48 V Rated output current 6.3 A Rated output power 302.4 W Output current range 0–6.3 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 180 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 25.2–46.8 VDC 1-second input range 21.6–50.4 VDC Typical efficiency 91% Typical DC input current 9.2 A at 36 VDC Typical inrush current 45 A at 36 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 36 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The catalogue supplies a dedicated RSD-300E-48 hold-up-versus-load curve. Hold-up duration increases as the load is reduced; use that model-specific curve for interruption sizing rather than a single duration for every load. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 55.2–64.8 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 20 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300E-24

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300E-24

    The MEAN WELL RSD-300E-24 is a fanless railway DC/DC converter with a 24 V output rated at 12.5 A and 300 W. Its E-code input supports continuous operation from 25.2–46.8 VDC and a separate 1-second input range of 21.6–50.4 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300E-24 Series RSD-300 Input version E; nominal test input 36 VDC DC output voltage 24 V Rated output current 12.5 A Rated output power 300 W Output current range 0–12.5 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 150 mVp-p Voltage tolerance ±2.0% Line regulation ±0.2% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 25.2–46.8 VDC 1-second input range 21.6–50.4 VDC Typical efficiency 91% Typical DC input current 9.2 A at 36 VDC Typical inrush current 45 A at 36 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 36 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The catalogue supplies a dedicated RSD-300E-24 hold-up-versus-load curve. Hold-up duration increases as the load is reduced; use that model-specific curve for interruption sizing rather than a single duration for every load. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 27.6–32.4 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 20 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Representative 24 V output undervoltage graph Turn-off approximately 18.6 VDC; turn-on approximately 20.9 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. The representative graph illustrates undervoltage hysteresis below the normal operating band; its plotted thresholds do not extend the permitted continuous input range. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300E-12

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300E-12

    The MEAN WELL RSD-300E-12 is a fanless railway DC/DC converter with a 12 V output rated at 25 A and 300 W. Its E-code input supports continuous operation from 25.2–46.8 VDC and a separate 1-second input range of 21.6–50.4 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300E-12 Series RSD-300 Input version E; nominal test input 36 VDC DC output voltage 12 V Rated output current 25 A Rated output power 300 W Output current range 0–25 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 120 mVp-p Voltage tolerance ±2.0% Line regulation ±0.3% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 25.2–46.8 VDC 1-second input range 21.6–50.4 VDC Typical efficiency 90% Typical DC input current 9.2 A at 36 VDC Typical inrush current 45 A at 36 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 36 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. The catalogue supplies a dedicated RSD-300E-12 hold-up-versus-load curve. Hold-up duration increases as the load is reduced; use that model-specific curve for interruption sizing rather than a single duration for every load. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 13.8–16.2 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 20 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300E-5

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300E-5

    The MEAN WELL RSD-300E-5 is a fanless railway DC/DC converter with a 5 V output rated at 42 A and 210 W. Its E-code input supports continuous operation from 25.2–46.8 VDC and a separate 1-second input range of 21.6–50.4 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300E-5 Series RSD-300 Input version E; nominal test input 36 VDC DC output voltage 5 V Rated output current 42 A Rated output power 210 W Output current range 0–42 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 100 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 25.2–46.8 VDC 1-second input range 21.6–50.4 VDC Typical efficiency 88% Typical DC input current 6.5 A at 36 VDC Typical inrush current 45 A at 36 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 36 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 5.75–7 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 20 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1, 2 DC OUTPUT −V Output 3, 4 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300D-48

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300D-48

    The MEAN WELL RSD-300D-48 is a fanless railway DC/DC converter with a 48 V output rated at 6.3 A and 302.4 W. Its D-code input supports continuous operation from 67.2–143 VDC and a separate 1-second input range of 57.6–154 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300D-48 Series RSD-300 Input version D; nominal test input 110 VDC DC output voltage 48 V Rated output current 6.3 A Rated output power 302.4 W Output current range 0–6.3 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 180 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 67.2–143 VDC 1-second input range 57.6–154 VDC Typical efficiency 91.5% Typical DC input current 3.1 A at 110 VDC Typical inrush current 45 A at 110 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 55.2–64.8 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 8 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300D-24

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300D-24

    The MEAN WELL RSD-300D-24 is a fanless railway DC/DC converter with a 24 V output rated at 12.5 A and 300 W. Its D-code input supports continuous operation from 67.2–143 VDC and a separate 1-second input range of 57.6–154 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300D-24 Series RSD-300 Input version D; nominal test input 110 VDC DC output voltage 24 V Rated output current 12.5 A Rated output power 300 W Output current range 0–12.5 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 150 mVp-p Voltage tolerance ±2.0% Line regulation ±0.2% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 67.2–143 VDC 1-second input range 57.6–154 VDC Typical efficiency 91.5% Typical DC input current 3.1 A at 110 VDC Typical inrush current 45 A at 110 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 27.6–32.4 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 8 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Representative 24 V output undervoltage graph Turn-off approximately 53.5 VDC; turn-on approximately 56.2 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. The representative graph illustrates undervoltage hysteresis below the normal operating band; its plotted thresholds do not extend the permitted continuous input range. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300D-12

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300D-12

    The MEAN WELL RSD-300D-12 is a fanless railway DC/DC converter with a 12 V output rated at 25 A and 300 W. Its D-code input supports continuous operation from 67.2–143 VDC and a separate 1-second input range of 57.6–154 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300D-12 Series RSD-300 Input version D; nominal test input 110 VDC DC output voltage 12 V Rated output current 25 A Rated output power 300 W Output current range 0–25 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 120 mVp-p Voltage tolerance ±2.0% Line regulation ±0.2% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 67.2–143 VDC 1-second input range 57.6–154 VDC Typical efficiency 91.5% Typical DC input current 3.1 A at 110 VDC Typical inrush current 45 A at 110 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 13.8–16.2 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 8 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300D-5

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300D-5

    The MEAN WELL RSD-300D-5 is a fanless railway DC/DC converter with a 5 V output rated at 42 A and 210 W. Its D-code input supports continuous operation from 67.2–143 VDC and a separate 1-second input range of 57.6–154 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300D-5 Series RSD-300 Input version D; nominal test input 110 VDC DC output voltage 5 V Rated output current 42 A Rated output power 210 W Output current range 0–42 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 100 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 67.2–143 VDC 1-second input range 57.6–154 VDC Typical efficiency 90% Typical DC input current 2.1 A at 110 VDC Typical inrush current 45 A at 110 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 110 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. For an application requiring a particular hold-up duration, confirm that duration at the actual load and input conditions. The S1 classification does not establish an additional model-specific 10 ms full-load rating. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 5.75–7 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 8 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1, 2 DC OUTPUT −V Output 3, 4 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300C-48

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300C-48

    The MEAN WELL RSD-300C-48 is a fanless railway DC/DC converter with a 48 V output rated at 6.3 A and 302.4 W. Its C-code input supports continuous operation from 33.6–62.4 VDC and a separate 1-second input range of 28.8–67.2 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300C-48 Series RSD-300 Input version C; nominal test input 48 VDC DC output voltage 48 V Rated output current 6.3 A Rated output power 302.4 W Output current range 0–6.3 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 180 mVp-p Voltage tolerance ±2.0% Line regulation ±0.5% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 33.6–62.4 VDC 1-second input range 28.8–67.2 VDC Typical efficiency 92% Typical DC input current 7.2 A at 48 VDC Typical inrush current 45 A at 48 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 48 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The catalogue supplies a dedicated RSD-300C-48 hold-up-versus-load curve. Hold-up duration increases as the load is reduced; use that model-specific curve for interruption sizing rather than a single duration for every load. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 55.2–64.8 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 16 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300C-24

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300C-24

    The MEAN WELL RSD-300C-24 is a fanless railway DC/DC converter with a 24 V output rated at 12.5 A and 300 W. Its C-code input supports continuous operation from 33.6–62.4 VDC and a separate 1-second input range of 28.8–67.2 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300C-24 Series RSD-300 Input version C; nominal test input 48 VDC DC output voltage 24 V Rated output current 12.5 A Rated output power 300 W Output current range 0–12.5 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 150 mVp-p Voltage tolerance ±2.0% Line regulation ±0.2% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 33.6–62.4 VDC 1-second input range 28.8–67.2 VDC Typical efficiency 91.5% Typical DC input current 7.2 A at 48 VDC Typical inrush current 45 A at 48 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 48 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The catalogue supplies a dedicated RSD-300C-24 hold-up-versus-load curve. Hold-up duration increases as the load is reduced; use that model-specific curve for interruption sizing rather than a single duration for every load. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 27.6–32.4 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 16 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Representative 24 V output undervoltage graph Turn-off approximately 24.2 VDC; turn-on approximately 25.8 VDC Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. The representative graph illustrates undervoltage hysteresis below the normal operating band; its plotted thresholds do not extend the permitted continuous input range. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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  • RSD-300C-12

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    MEAN WELL RSD-300 series: Railway DC/DC Converter - RSD-300C-12

    The MEAN WELL RSD-300C-12 is a fanless railway DC/DC converter with a 12 V output rated at 25 A and 300 W. Its C-code input supports continuous operation from 33.6–62.4 VDC and a separate 1-second input range of 28.8–67.2 VDC. The half-encapsulated enclosure provides 4 kVDC input-to-output isolation; available load depends on ambient temperature and the mounting heat-transfer arrangement. Product Datasheet Download MEAN WELL RSD-300 Datasheet (PDF) The RSD-300 section is on PDF pages 42, 43, 44, 45, 46, 47, 48, 49, 50, 51. Refer to the complete mechanical drawings and notes when planning installation. Model and Output Ratings Full model RSD-300C-12 Series RSD-300 Input version C; nominal test input 48 VDC DC output voltage 12 V Rated output current 25 A Rated output power 300 W Output current range 0–25 A Output voltage adjustment Optional by request; not included in the standard product Maximum ripple and noise 120 mVp-p Voltage tolerance ±2.0% Line regulation ±0.3% Load regulation ±1.0% Use the voltage, current and actual rated power together when selecting the load. The family wattage designation does not replace the rating of this output and input version. The standard RSD-300 output is not user-adjustable. Request the optional voltage-adjustment configuration from the manufacturer when required. Input, Timing and Measurement Conditions Continuous DC input range 33.6–62.4 VDC 1-second input range 28.8–67.2 VDC Typical efficiency 91% Typical DC input current 7.2 A at 48 VDC Typical inrush current 45 A at 48 VDC Set-up / rise time 800 / 50 ms at full load Normal measurement conditions 48 VDC input, rated load and 25°C ambient Supply interruption classification EN 50155:2021, S1 The 1-second range is a transient operating condition, not an extension of the continuous input rating. Keep the input within the continuous range for sustained use. Ripple and noise are measured at 20 MHz bandwidth with a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation. The manufacturer strongly recommends keeping external output capacitance at or below 5000 µF for this output-voltage version. The catalogue supplies a dedicated RSD-300C-12 hold-up-versus-load curve. Hold-up duration increases as the load is reduced; use that model-specific curve for interruption sizing rather than a single duration for every load. Protection and Input Safeguards Protection functions Short circuit, overload, overvoltage, overtemperature and input reverse polarity Overload threshold 105–135% of rated output power Overload response Constant-current limiting; automatic recovery after the fault is removed Overvoltage threshold 13.8–16.2 V Overvoltage recovery Output shutdown; reapply input power to recover Overtemperature recovery Output shutdown; automatic recovery after cooling Input reverse polarity A MOSFET in series with the negative input opens and prevents output when polarity is reversed Internal input fuse reference Conquer UDA-A; time-lag; 16 A, 250 V Inrush limiting Start-up resistor bypassed by a MOSFET after start-up Do not operate continuously in the overload region: overheating can reduce service life or damage the converter. The internal fuse reference describes the installed protection component; it is not an external fuse-selection instruction. When input voltage falls below the undervoltage operating threshold, the controller stops the output. The output resumes automatically after the input rises sufficiently, provided no latched protection remains active. Power Terminals and Indicator Input 1 DC INPUT V+ Input 2 DC INPUT V− Input 3 FG Output 1 DC OUTPUT −V Output 2 DC OUTPUT +V LED status Green: normal operation; unlit: no power or a failure Connect the DC source and load with the polarities shown and connect FG to the installation protective-earth system. Size conductors and terminations for the current of this model. Use the mechanical drawing to identify the physical terminal positions. Leave space for terminal access and cable bends; the body dimensions do not include the full installed wiring envelope. Series Operation and Redundant Supply Connections Parallel current sharing No built-in parallel circuit; a parallel arrangement does not increase the converter current rating Redundant supply arrangement External positive-output isolation diode for each supply, with suitable heat sinking Series output arrangement Positive/negative rails or added output voltage; current rating does not increase For the illustrated redundant connection, each isolation diode must have a current rating greater than the maximum output current rating of its supply and must be fitted to an appropriate heat sink. Verify the completed external circuit for the intended load. Parallel supply connections increase leakage current. Confirm installation suitability with the supplier for this application. For the illustrated voltage-adding series connection, fit external blocking diodes as shown because the units do not contain reverse-blocking diodes. The external diode voltage rating must exceed V1 + V2. Follow the catalogue connection diagram and system insulation requirements. Cooling, Derating and Environment Cooling Free-air convection; fanless, half-encapsulated construction Working ambient temperature −40 to +70°C, subject to derating and mounting conditions Single-unit ambient load curve 100% load through 55°C; reduce to 60% at 70°C Additional heat-transfer plate 360 × 360 × 2 mm iron plate Operation with the specified iron plate 100% load from −40 to +70°C in the published installation Case-temperature curve 100% rated current up to 80°C at the marked tc point Working humidity 5–95% RH, non-condensing Storage temperature / humidity −40 to +85°C Temperature coefficient ±0.03%/°C over 0–55°C Operating altitude Up to 5000 m Altitude temperature derating Above 2000 m: reduce permitted ambient temperature by 3.5°C per additional 1000 m Vibration 10–500 Hz, 5 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis; mounting in accordance with IEC 61373 The ambient and case-temperature limits apply together. A permissible case temperature does not by itself waive the ambient-temperature load curve. To achieve the published full-load 70°C EN 50155 TX arrangement, firmly mount the converter centrally on the specified smooth, even iron plate with good thermal contact. Follow the illustrated orientation and mounting method. The half-encapsulated construction supports the installation orientations shown in the catalogue with the corresponding common derating curve. Safety, Isolation and EMC Catalogue-listed safety approvals UL 62368-1; IEC 62368-1; AS/NZS 62368-1; EAC TP TC 004 Additional safety design reference BS EN / EN 62368-1 Railway requirements BS EN / EN 50155 and IEC 60571; IEC 61373 shock and vibration; BS EN / EN 50121-3-2 EMC; BS EN / EN 45545-2 fire protection Withstand voltage Input–output: 4 kVDC; input–FG: 2.5 kVDC; output–FG: 2.5 kVDC Isolation resistance 100 MΩ between input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH Conducted emission BS EN / EN 55032 (CISPR 32), Class A Radiated emission BS EN / EN 55032 (CISPR 32), Class B EMC immunity BS EN / EN 61000-4-2/-3/-4/-5/-6/-8; BS EN / EN 55035; light-industry level; EAC TP TC 020 Additional EMC conformity EAC TP TC 020 Confirm compliance of the completed installation with the applicable EMC and safety requirements. Component test results do not certify the entire vehicle or equipment. The component EMC tests use a 360 × 360 × 1 mm metal plate. This EMC test plate is distinct from the 360 × 360 × 2 mm iron plate specified for full-load 70°C thermal operation. Railway Environmental and Fire Test References The catalogue reports PASS for EN 50155 dry heat (section 13.4.5: 70°C for 6 hours and 85°C for 10 minutes); cyclic damp heat (13.4.8: 25–55°C, 90–100% RH, 48 hours); vibration (13.4.10: 19°C, 65% RH, 10 minutes); shock (13.4.10: 21 ±3°C, 65 ±5% RH, 30 ms ×18); low-temperature storage (13.4.6: −40°C, 16 hours); and salt mist (13.4.13: 35 ±2°C, 96 hours). These are test conditions, not expanded continuous operating limits. EN 45545-2:2020 fire-test references cover PCB R22 oxygen index (EN ISO 4589-2:2017), smoke density (EN ISO 5659-2:2017) and smoke toxicity (EN 17084:2018); PCB R24 oxygen index; PCB R25 glow-wire (EN 60695-2-11:2014); potting R24 oxygen index; and terminal-block R26 vertical flame (EN 60695-11-10:2013). HL1 and HL2 are marked PASS for every listed item. HL3 is marked PASS for the listed items except PCB R22 smoke density, for which no PASS result is listed. Mechanical Data and Installation Items Catalogue body dimensions, L × W × H 216 × 96.5 × 40 mm Case reference 205 Drawing tolerance ±1 mm Mounting layout 208 mm longitudinal reference; 4 × R2.1 mounting slots and the marked 2 × R2.1 side features Iron-plate fixing arrangement Four M4 screws at the illustrated positions Case-temperature measurement point Marked tc in the mechanical drawing Unit mass, catalogue PACKING reference 1190 g Catalogue packing 1.19 kg; 12 units / 15.3 kg / 0.97 CUFT Minimum MTBF 1850.1K hours, Telcordia SR-332 (Bellcore); 130.8K hours, MIL-HDBK-217F at 25°C Nominal switching frequency 130 kHz Catalogue warranty 3 years Capacitor specification 105°C long-life electrolytic capacitors Production test 100% full-load burn-in test The RSD-300 drawing separately shows terminal projections of up to 15 mm at each end. Allow these projections and the required wire-bend clearance beyond the body outline. The iron plate, fixings and any external connection components must be selected for the installation. Confirm supplied items with the order; the catalogue plate drawing does not establish that a separate plate kit is included. The mass is the explicit catalogue packing reference per unit, not a measured net mass or the weight of a complete shipping package.

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