MEAN WELL RPS-75 series: Open-Frame Medical AC/DC Power Supply - RPS-75-3.3

Description

MEAN WELL RPS-75-3.3 is a 5 × 3-inch open-frame medical AC/DC power supply with a 3.3 V main output. The main-output current is 15 A with natural convection and 20 A with the specified 23.5 CFM airflow. Standard RPS-75 model with remote sense. It is intended for Class I equipment with protective grounding; BF applications require appropriate system consideration.

Product Datasheet

Download MEAN WELL RPS-75 Datasheet (PDF)

The RPS-75 section is on PDF pages 33, 34, 35, 36. Refer to the complete mechanical drawings and notes when planning installation.

Model and Application

Complete model RPS-75-3.3
Configuration Standard RPS-75 model with remote sense.
Board format 127 × 76.2 mm (5 × 3 inches); open-frame PCB construction.
Intended applications Oral irrigators, hemodialysis equipment, medical monitors and sleep-apnea devices.

Medical component approvals and isolation ratings do not certify the completed device. The equipment design must satisfy the applicable patient-protection, grounding, leakage-current and EMC requirements.

Output Ratings and Cooling Conditions

Nominal main output 3.3 V.
Convection main-output current 0–15 A.
Forced-air main-output current 0–20 A with at least 23.5 CFM as shown in the installation drawing.
Convection rated power 49.5 W.
Catalogue peak-load rating 66 W with 23.5 CFM forced air; use the temperature and input derating curves.
Voltage adjustment 2.9–3.6 V for the main output.
Ripple and noise, maximum 60 mVp-p.
Voltage tolerance ±2.0%; includes set-up tolerance, line regulation and load regulation.
Line regulation ±0.5%.
Load regulation ±1.5%.
Efficiency, typical 73%.

The higher catalogue rating is tied to forced-air cooling. No pulse-duration or duty-cycle allowance is specified on these pages; do not substitute an unsupported transient-peak claim for the cooling requirements.

Unless otherwise stated, parameters are measured at 230 VAC, rated load and 25°C ambient. Ripple/noise uses 20 MHz bandwidth and a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors.

Input, Timing and Leakage

Input range 90–264 VAC or 127–370 VDC; observe the low-input derating curve.
Input frequency 47–63 Hz.
AC current, typical 1.5 A at 115 VAC; 1 A at 230 VAC.
Cold-start inrush, typical 25 A at 115 VAC; 50 A at 230 VAC.
Set-up and rise time 500 ms set-up at 230 VAC; 500 ms at 115 VAC; 30 ms rise at either input, at full load.
Hold-up time, typical 90 ms at 230 VAC; 20 ms at 115 VAC, at full load.
Earth leakage current Less than 150 µA at 264 VAC.
Touch current Less than 100 µA at 264 VAC, measured from primary input to DC output.
No-load input power Less than 0.75 W.
Switching-frequency reference 65 kHz in the block diagram.

Protection

Short circuit and overload 140–180% of rated output power; hiccup mode automatically recovers after the fault is removed.
Overvoltage threshold 3.8–4.5 V.
Overvoltage response Output shuts down; re-power to recover.

Protection trip thresholds do not increase the usable output rating.

Control and Monitoring

Remote sense Available through CN3: pin 1 RS+, pin 2 RS−. The catalogue does not specify a maximum compensation voltage.
Status indication LED1 is shown on the mechanical drawing.

Temperature, Input Derating and Environment

Working temperature −20 to +70°C with the applicable cooling and load restrictions.
Horizontal-mounting temperature curve Convection: 100% of the convection rating from −20°C to 40°C, then derate to 50% at 70°C. The 23.5 CFM curve is marked 133% through 60°C, falling to 50% at 70°C; apply the exact model-specific forced-air current and power entries above.
Input-voltage curve At 60 Hz, the graph permits 80% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 264 VAC.
Working humidity 20–90% RH, non-condensing.
Storage −40 to +85°C; 10–95% RH, non-condensing.
Temperature coefficient ±0.03%/°C over 0–50°C.
Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes each along X, Y and Z.
Operating altitude Up to 3,000 m. Above 2,000 m, reduce permitted ambient temperature by 3.5°C per additional 1,000 m for fanless operation, or 5°C per additional 1,000 m with a fan.

Combine temperature, input-voltage and airflow restrictions. Do not interpret the maximum ambient temperature as a full-power rating.

Installation and Mechanical Details

Dimensions, L × W × H 127 × 76.2 × 31 mm.
Mounting holes Four holes, diameter 3.8 mm; centre spacing 115.8 × 64.75 mm.
Drawing references Edge-to-hole offsets are 5.6 mm and 5.7 mm as drawn. General dimensional tolerance ±1 mm; projection below the board 3 mm maximum.
Forced-air arrangement At least 23.5 CFM; the drawing shows a fan 15 cm from the board edge, centred at the 63.5 mm longitudinal position, with airflow across the board in the indicated direction.
Safety ground and chassis M1 is the safety-ground point. Secure electrical connections between M1, M2 and chassis ground for the specified installation and EMC performance.
Heat sinks HS1, HS2 and HS3 must not be shorted together.
On-board fuse marking T2.5/250V is shown on the AC fuse; this is a rating/designation, not a complete replacement ordering code.

Follow the complete mechanical drawing and manufacturer installation manual. The catalogue does not specify mounting-screw torque, supplied mounting hardware or a complete fan ordering code. The indicated airflow arrangement is required for the corresponding higher-load rating.

Compatible Connectors and Mating Parts

AC input CN1 JST B3P-VH or equivalent; pin 1 AC/N, pin 2 absent, pin 3 AC/L. Mating housing is printed as JST VHR; terminal JST SVH-21T-P1.1 or equivalent.
DC output CN2 JST B8P-VH or equivalent; pins 1–4 +V, pins 5–8 −V. Mating housing is printed as JST VHR; terminal JST SVH-21T-P1.1 or equivalent.
Remote-sense CN3 JST B2B-XH or equivalent; pin 1 RS+, pin 2 RS−. Mating housing is printed as JST XHP; terminal JST SXH-001T-P0.6 or equivalent.

The complete printed connector and terminal references above identify the documented interface parts. VHR and XHP are abbreviated housing-family references; Confirm the full housing/contact suffix and circuit count with the connector supplier before ordering. No unprinted suffix or inclusion in the power-supply package is implied.

Safety, Isolation and EMC

Listed medical approvals IEC60601-1:2005+A1+A2; TUV BS EN/EN60601-1:2006+A1+A12+A2; ANSI/AAMI ES60601-1:2005+A2; CAN/CSA C22.2 No.60601-1:2014+A2; EAC TP TC004.
Other design reference BS EN/EN60335-1 is listed as a design reference by request, not an unconditional standard configuration approval.
Patient-protection isolation Primary to secondary: 2 × MOPP; primary to earth: 1 × MOPP.
System configuration Class I with FG. Suitable for BF applications with appropriate system consideration.
Withstand voltage Input to output 4 kVAC; input to FG 2 kVAC; output to FG 1.5 kVAC.
Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH.
Emissions BS EN/EN55011 (CISPR11), conducted and radiated Class B for Class I configuration. Harmonic current: BS EN/EN61000-3-2 Class A; flicker: BS EN/EN61000-3-3.
Immunity framework BS EN/EN55035 and BS EN/EN60601-1-2.
ESD BS EN/EN61000-4-2: Level 4, 15 kV air and 8 kV contact.
RF immunity BS EN/EN61000-4-3: Level 3, 10 V/m at 80 MHz–2.7 GHz; Table 9, 9–28 V/m at 385 MHz–5.78 GHz.
EFT / burst and surge BS EN/EN61000-4-4: Level 3, 2 kV. BS EN/EN61000-4-5: Level 4, 4 kV line-to-FG and 2 kV line-to-line.
Conducted and magnetic immunity BS EN/EN61000-4-6: Level 3, 10 V. BS EN/EN61000-4-8: Level 4, 30 A/m.
Voltage dips and interruptions BS EN/EN61000-4-11: 100% dip for 1 period, 30% dip for 25 periods, and 100% interruption for 250 periods.

EMC testing used a 360 × 360 mm metal plate, 1 mm thick. This supply is an equipment component; EMC compliance must be confirmed again in the finished equipment.

Weight, Reliability and Catalogue Reference

Single-unit catalogue weight 260 g, from the explicit 0.26 kg per-unit PACKING entry. This is a catalogue reference, not a measured net or shipping weight.
Packing reference 63 pieces / 16.3 kg / 1.28 CUFT.
MTBF estimates 2837.6 thousand hours minimum, Telcordia SR-332 (Bellcore); 446.8 thousand hours minimum, MIL-HDBK-217F at 25°C.
Manufacturer warranty 3 years, subject to applicable manufacturer terms.
Catalogue revision RPS-75-SPEC 2024-11-22; combined PDF pages 33–36.
Lifetime feature The family feature page states lifetime greater than 80,000 hours; it provides no operating-condition curve here. This is not an unconditional service-life guarantee.

MTBF is a statistical reliability estimate under the stated methods, not a guaranteed service life.

MEAN WELL RPS-75 series: Open-Frame Medical AC/DC Power Supply - RPS-75-3.3

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MEAN WELL RPS-75-3.3 is a 5 × 3-inch open-frame medical AC/DC power supply with a 3.3 V main output. The... Read more

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    Description

    MEAN WELL RPS-75-3.3 is a 5 × 3-inch open-frame medical AC/DC power supply with a 3.3 V main output. The main-output current is 15 A with natural convection and 20 A with the specified 23.5 CFM airflow. Standard RPS-75 model with remote sense. It is intended for Class I equipment with protective grounding; BF applications require appropriate system consideration.

    Product Datasheet

    Download MEAN WELL RPS-75 Datasheet (PDF)

    The RPS-75 section is on PDF pages 33, 34, 35, 36. Refer to the complete mechanical drawings and notes when planning installation.

    Model and Application

    Complete model RPS-75-3.3
    Configuration Standard RPS-75 model with remote sense.
    Board format 127 × 76.2 mm (5 × 3 inches); open-frame PCB construction.
    Intended applications Oral irrigators, hemodialysis equipment, medical monitors and sleep-apnea devices.

    Medical component approvals and isolation ratings do not certify the completed device. The equipment design must satisfy the applicable patient-protection, grounding, leakage-current and EMC requirements.

    Output Ratings and Cooling Conditions

    Nominal main output 3.3 V.
    Convection main-output current 0–15 A.
    Forced-air main-output current 0–20 A with at least 23.5 CFM as shown in the installation drawing.
    Convection rated power 49.5 W.
    Catalogue peak-load rating 66 W with 23.5 CFM forced air; use the temperature and input derating curves.
    Voltage adjustment 2.9–3.6 V for the main output.
    Ripple and noise, maximum 60 mVp-p.
    Voltage tolerance ±2.0%; includes set-up tolerance, line regulation and load regulation.
    Line regulation ±0.5%.
    Load regulation ±1.5%.
    Efficiency, typical 73%.

    The higher catalogue rating is tied to forced-air cooling. No pulse-duration or duty-cycle allowance is specified on these pages; do not substitute an unsupported transient-peak claim for the cooling requirements.

    Unless otherwise stated, parameters are measured at 230 VAC, rated load and 25°C ambient. Ripple/noise uses 20 MHz bandwidth and a 12-inch twisted pair terminated by parallel 0.1 µF and 47 µF capacitors.

    Input, Timing and Leakage

    Input range 90–264 VAC or 127–370 VDC; observe the low-input derating curve.
    Input frequency 47–63 Hz.
    AC current, typical 1.5 A at 115 VAC; 1 A at 230 VAC.
    Cold-start inrush, typical 25 A at 115 VAC; 50 A at 230 VAC.
    Set-up and rise time 500 ms set-up at 230 VAC; 500 ms at 115 VAC; 30 ms rise at either input, at full load.
    Hold-up time, typical 90 ms at 230 VAC; 20 ms at 115 VAC, at full load.
    Earth leakage current Less than 150 µA at 264 VAC.
    Touch current Less than 100 µA at 264 VAC, measured from primary input to DC output.
    No-load input power Less than 0.75 W.
    Switching-frequency reference 65 kHz in the block diagram.

    Protection

    Short circuit and overload 140–180% of rated output power; hiccup mode automatically recovers after the fault is removed.
    Overvoltage threshold 3.8–4.5 V.
    Overvoltage response Output shuts down; re-power to recover.

    Protection trip thresholds do not increase the usable output rating.

    Control and Monitoring

    Remote sense Available through CN3: pin 1 RS+, pin 2 RS−. The catalogue does not specify a maximum compensation voltage.
    Status indication LED1 is shown on the mechanical drawing.

    Temperature, Input Derating and Environment

    Working temperature −20 to +70°C with the applicable cooling and load restrictions.
    Horizontal-mounting temperature curve Convection: 100% of the convection rating from −20°C to 40°C, then derate to 50% at 70°C. The 23.5 CFM curve is marked 133% through 60°C, falling to 50% at 70°C; apply the exact model-specific forced-air current and power entries above.
    Input-voltage curve At 60 Hz, the graph permits 80% load at 90 VAC, rising to 100% at 100 VAC and remaining at 100% through 264 VAC.
    Working humidity 20–90% RH, non-condensing.
    Storage −40 to +85°C; 10–95% RH, non-condensing.
    Temperature coefficient ±0.03%/°C over 0–50°C.
    Vibration 10–500 Hz, 2 G, 10 minutes per cycle; 60 minutes each along X, Y and Z.
    Operating altitude Up to 3,000 m. Above 2,000 m, reduce permitted ambient temperature by 3.5°C per additional 1,000 m for fanless operation, or 5°C per additional 1,000 m with a fan.

    Combine temperature, input-voltage and airflow restrictions. Do not interpret the maximum ambient temperature as a full-power rating.

    Installation and Mechanical Details

    Dimensions, L × W × H 127 × 76.2 × 31 mm.
    Mounting holes Four holes, diameter 3.8 mm; centre spacing 115.8 × 64.75 mm.
    Drawing references Edge-to-hole offsets are 5.6 mm and 5.7 mm as drawn. General dimensional tolerance ±1 mm; projection below the board 3 mm maximum.
    Forced-air arrangement At least 23.5 CFM; the drawing shows a fan 15 cm from the board edge, centred at the 63.5 mm longitudinal position, with airflow across the board in the indicated direction.
    Safety ground and chassis M1 is the safety-ground point. Secure electrical connections between M1, M2 and chassis ground for the specified installation and EMC performance.
    Heat sinks HS1, HS2 and HS3 must not be shorted together.
    On-board fuse marking T2.5/250V is shown on the AC fuse; this is a rating/designation, not a complete replacement ordering code.

    Follow the complete mechanical drawing and manufacturer installation manual. The catalogue does not specify mounting-screw torque, supplied mounting hardware or a complete fan ordering code. The indicated airflow arrangement is required for the corresponding higher-load rating.

    Compatible Connectors and Mating Parts

    AC input CN1 JST B3P-VH or equivalent; pin 1 AC/N, pin 2 absent, pin 3 AC/L. Mating housing is printed as JST VHR; terminal JST SVH-21T-P1.1 or equivalent.
    DC output CN2 JST B8P-VH or equivalent; pins 1–4 +V, pins 5–8 −V. Mating housing is printed as JST VHR; terminal JST SVH-21T-P1.1 or equivalent.
    Remote-sense CN3 JST B2B-XH or equivalent; pin 1 RS+, pin 2 RS−. Mating housing is printed as JST XHP; terminal JST SXH-001T-P0.6 or equivalent.

    The complete printed connector and terminal references above identify the documented interface parts. VHR and XHP are abbreviated housing-family references; Confirm the full housing/contact suffix and circuit count with the connector supplier before ordering. No unprinted suffix or inclusion in the power-supply package is implied.

    Safety, Isolation and EMC

    Listed medical approvals IEC60601-1:2005+A1+A2; TUV BS EN/EN60601-1:2006+A1+A12+A2; ANSI/AAMI ES60601-1:2005+A2; CAN/CSA C22.2 No.60601-1:2014+A2; EAC TP TC004.
    Other design reference BS EN/EN60335-1 is listed as a design reference by request, not an unconditional standard configuration approval.
    Patient-protection isolation Primary to secondary: 2 × MOPP; primary to earth: 1 × MOPP.
    System configuration Class I with FG. Suitable for BF applications with appropriate system consideration.
    Withstand voltage Input to output 4 kVAC; input to FG 2 kVAC; output to FG 1.5 kVAC.
    Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH.
    Emissions BS EN/EN55011 (CISPR11), conducted and radiated Class B for Class I configuration. Harmonic current: BS EN/EN61000-3-2 Class A; flicker: BS EN/EN61000-3-3.
    Immunity framework BS EN/EN55035 and BS EN/EN60601-1-2.
    ESD BS EN/EN61000-4-2: Level 4, 15 kV air and 8 kV contact.
    RF immunity BS EN/EN61000-4-3: Level 3, 10 V/m at 80 MHz–2.7 GHz; Table 9, 9–28 V/m at 385 MHz–5.78 GHz.
    EFT / burst and surge BS EN/EN61000-4-4: Level 3, 2 kV. BS EN/EN61000-4-5: Level 4, 4 kV line-to-FG and 2 kV line-to-line.
    Conducted and magnetic immunity BS EN/EN61000-4-6: Level 3, 10 V. BS EN/EN61000-4-8: Level 4, 30 A/m.
    Voltage dips and interruptions BS EN/EN61000-4-11: 100% dip for 1 period, 30% dip for 25 periods, and 100% interruption for 250 periods.

    EMC testing used a 360 × 360 mm metal plate, 1 mm thick. This supply is an equipment component; EMC compliance must be confirmed again in the finished equipment.

    Weight, Reliability and Catalogue Reference

    Single-unit catalogue weight 260 g, from the explicit 0.26 kg per-unit PACKING entry. This is a catalogue reference, not a measured net or shipping weight.
    Packing reference 63 pieces / 16.3 kg / 1.28 CUFT.
    MTBF estimates 2837.6 thousand hours minimum, Telcordia SR-332 (Bellcore); 446.8 thousand hours minimum, MIL-HDBK-217F at 25°C.
    Manufacturer warranty 3 years, subject to applicable manufacturer terms.
    Catalogue revision RPS-75-SPEC 2024-11-22; combined PDF pages 33–36.
    Lifetime feature The family feature page states lifetime greater than 80,000 hours; it provides no operating-condition curve here. This is not an unconditional service-life guarantee.

    MTBF is a statistical reliability estimate under the stated methods, not a guaranteed service life.

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