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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-54

  MEAN WELL LOP-600-54 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 54 V output is rated at 11.2 A / 604.8 W with 23 CFM airflow, or 7.4 A / 399.6 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-54. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 54 VDC. Current with 23 CFM airflow 11.2 A. Rated power with 23 CFM airflow 604.8 W. Natural-convection current 7.4 A. Natural-convection rated power 399.6 W. Peak output, maximum 3 seconds 16.7 A / 901.8 W; not a continuous rating. Voltage adjustment 52–58 V using SVR. Maximum ripple and noise 250 mVp-p. Voltage tolerance ±1%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 95%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 59.4–67.5 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 400 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 400 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope The catalogue SELV and SELV/ES1 listings cover the 12–48 V versions; the 54 V version is not included in that listed voltage range. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-48

  MEAN WELL LOP-600-48 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 48 V output is rated at 12.5 A / 600 W with 23 CFM airflow, or 8.3 A / 398.4 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-48. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 48 VDC. Current with 23 CFM airflow 12.5 A. Rated power with 23 CFM airflow 600 W. Natural-convection current 8.3 A. Natural-convection rated power 398.4 W. Peak output, maximum 3 seconds 18.8 A / 902.4 W; not a continuous rating. Voltage adjustment 45.6–50.4 V using SVR. Maximum ripple and noise 250 mVp-p. Voltage tolerance ±1%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 95%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 52.8–62.4 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 400 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 400 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-36

  MEAN WELL LOP-600-36 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 36 V output is rated at 16.7 A / 601.2 W with 23 CFM airflow, or 11.1 A / 399.6 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-36. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 36 VDC. Current with 23 CFM airflow 16.7 A. Rated power with 23 CFM airflow 601.2 W. Natural-convection current 11.1 A. Natural-convection rated power 399.6 W. Peak output, maximum 3 seconds 25 A / 900 W; not a continuous rating. Voltage adjustment 34.2–37.8 V using SVR. Maximum ripple and noise 250 mVp-p. Voltage tolerance ±1%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 95%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 39.6–46.8 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 400 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 400 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-27

  MEAN WELL LOP-600-27 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 27 V output is rated at 22.3 A / 602.1 W with 23 CFM airflow, or 14.8 A / 399.6 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-27. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 27 VDC. Current with 23 CFM airflow 22.3 A. Rated power with 23 CFM airflow 602.1 W. Natural-convection current 14.8 A. Natural-convection rated power 399.6 W. Peak output, maximum 3 seconds 33.3 A / 899.1 W; not a continuous rating. Voltage adjustment 25.6–28.4 V using SVR. Maximum ripple and noise 200 mVp-p. Voltage tolerance ±1%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 95%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 29.7–35.1 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 400 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 400 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-24

  MEAN WELL LOP-600-24 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 24 V output is rated at 25 A / 600 W with 23 CFM airflow, or 16.7 A / 400.8 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-24. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 24 VDC. Current with 23 CFM airflow 25 A. Rated power with 23 CFM airflow 600 W. Natural-convection current 16.7 A. Natural-convection rated power 400.8 W. Peak output, maximum 3 seconds 37.5 A / 900 W; not a continuous rating. Voltage adjustment 22.8–25.2 V using SVR. Maximum ripple and noise 200 mVp-p. Voltage tolerance ±2%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 94%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 26.4–31.2 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 400 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 400 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-18

  MEAN WELL LOP-600-18 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 18 V output is rated at 33.3 A / 599.4 W with 23 CFM airflow, or 20 A / 360 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-18. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 18 VDC. Current with 23 CFM airflow 33.3 A. Rated power with 23 CFM airflow 599.4 W. Natural-convection current 20 A. Natural-convection rated power 360 W. Peak output, maximum 3 seconds 50 A / 900 W; not a continuous rating. Voltage adjustment 17.1–18.9 V using SVR. Maximum ripple and noise 180 mVp-p. Voltage tolerance ±3%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 94%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 19.8–23.4 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 360 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 360 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-15

  MEAN WELL LOP-600-15 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 15 V output is rated at 40 A / 600 W with 23 CFM airflow, or 24 A / 360 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-15. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 15 VDC. Current with 23 CFM airflow 40 A. Rated power with 23 CFM airflow 600 W. Natural-convection current 24 A. Natural-convection rated power 360 W. Peak output, maximum 3 seconds 60 A / 900 W; not a continuous rating. Voltage adjustment 14.3–15.8 V using SVR. Maximum ripple and noise 150 mVp-p. Voltage tolerance ±3%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 93.5%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 16.5–19.5 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 360 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 360 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 33.5 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-600 series: Low Profile Open-Frame AC/DC Power Supply - LOP-600-12

  MEAN WELL LOP-600-12 is a low-profile open-frame AC/DC power supply with active PFC and a 5 × 3 inch footprint. Its 12 V output is rated at 50 A / 600 W with 23 CFM airflow, or 30 A / 360 W with natural convection, subject to input-voltage and temperature derating. Product Datasheet Download MEAN WELL LOP-600 Datasheet (PDF) The LOP-600 section is on PDF pages 21, 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation. Model and Cooling Configuration Complete model LOP-600-12. Series LOP-600 single-output open-frame switching power supply. Cooling Natural convection or externally provided 23 CFM airflow, with different output limits below. Functions Active PFC, remote sense and 12 V fan supply. PG/PF power-good/power-fail signalling is optional. Construction Class I with protective grounding, or Class II without FG, subject to the installation and EMC requirements. Suitable applications include industrial automation and control, security, mechanical and electrical equipment, electronic instruments, network and telecommunications equipment, PoE equipment, home automation and medical devices. The series lists a power density of 30.3 W/in³. Output Ratings Nominal output 12 VDC. Current with 23 CFM airflow 50 A. Rated power with 23 CFM airflow 600 W. Natural-convection current 30 A. Natural-convection rated power 360 W. Peak output, maximum 3 seconds 75 A / 900 W; not a continuous rating. Voltage adjustment 11.4–12.6 V using SVR. Maximum ripple and noise 120 mVp-p. Voltage tolerance ±3%. Line regulation ±0.5%. Load regulation ±1%. Typical efficiency 93%. Observe both current and power limits for the selected cooling condition. The individual output table, input-voltage curve and thermal curves apply together. Unless otherwise specified, parameters are measured at 230 VAC input, rated load and 25°C ambient. Ripple/noise is measured with 20 MHz bandwidth, a 12-inch twisted pair and parallel 0.1 μF and 47 μF capacitors. Voltage tolerance includes setup tolerance, line regulation and load regulation. Input and Timing Input voltage 80–264 VAC or 113–370 VDC. AC frequency 47–63 Hz. Power factor at full load Greater than 0.95 at 230 VAC; greater than 0.98 at 115 VAC. Typical AC input current 6.4 A at 115 VAC; 3.2 A at 230 VAC. Typical cold-start inrush 40 A at 115 VAC; 80 A at 230 VAC. Earth leakage current Less than 500 μA rms at 264 VAC. Touch current Less than 70 μA rms at 264 VAC. No-load input power Less than 0.5 W. Setup and rise at full load Setup: 1000 ms at 230 VAC / 1500 ms at 115 VAC; rise: 50 ms at either input. Typical hold-up 12 ms at 400 W load; 8 ms at 600 W load. The 60 Hz low-input curve permits 70% load at 80 VAC, reaches 100% at 115 VAC and remains at 100% through 264 VAC. Protection Short circuit and overload 105–150% of rated output power; hiccup mode after 3 seconds, with automatic recovery after the fault is removed. Overvoltage threshold 13.2–15.6 V. Overvoltage recovery Output shuts down; re-power on to recover. Overtemperature Output shuts down; automatic recovery after the temperature falls, or re-power on. Remote Sense, Fan Supply and Optional PG/PF Remote sense Compensates up to 0.5 V of voltage drop; use the correct +R.S and −R.S polarity on CN3. 12 V fan supply 12 V at 0.5 A with 23 CFM airflow, or 0.2 A without a fan; tolerance ±15% at 20% of the main output rated current. PG/PF option Optional power-good / power-fail signal. Confirm the required signal option before ordering. Power-good timing TTL high after setup, with 10 ms < PG delay < 500 ms. Power-fail timing TTL low at least 1 ms before the main output falls below 90% of its rated voltage. PG/PF logic levels Low: 0–1 V; high: 2–5 V. Use DC COM and the assigned signal pins. The optional PG/PF signal is not a remote on/off input, and the fan supply is not a 5 V standby output. Environment and Thermal Derating Operating temperature −40 to +80°C, subject to the selected cooling curve. Operating humidity 20–90% RH, non-condensing. Storage −40 to +85°C, 10–95% RH. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes each along X, Y and Z. Operating altitude Up to 5000 m; the standard-specific overvoltage-category limits below must also be observed. For horizontal mounting with 23 CFM airflow, the series curve shows 600 W through 50°C, then 450 W at 60°C, 300 W at 70°C and 220 W at 80°C. For this output-voltage group with natural convection at 115 VAC, the curve shows 360 W through 30°C, then 300 W at 40°C, 270 W at 50°C, 220 W at 60°C and 170 W at 70°C. At 230 VAC it shows 360 W through 40°C, then 300 W at 50°C, 270 W at 60°C and 180 W at 70°C. Natural-convection curves end at 70°C. Use the model-specific current and power limits together with these series curves, and do not extend a cooling curve beyond its plotted range. Mechanical Installation Overall dimensions (L × W × H) 127 × 76.2 × 35 mm. Drawing tolerance ±1 mm. Mounting Four Ø3.5 mm holes; 115.6 × 64.8 mm centres and 5.7 mm edge references. Underside reference 3 mm maximum underside projection; maintain the installation clearances in the drawing. Airflow arrangement Provide 23 CFM airflow from a fan 5 cm from the long side, in the illustrated direction. The drawing marks a 63.5 mm position reference from the right edge. Grounding Ground the indicated safety-ground mounting holes in a Class I installation. Class II installation does not require an FG connection. Isolation Do not short HS1 and HS2 together. Follow the mechanical drawing on PDF page 25 for connector orientation, SVR, mounting and airflow. A required external fan or mating harness is not automatically included with the power supply. Connections and Mating Parts AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. Mating housing: JST VHR family; terminal: JST SVH-21T-P1.1 or equivalent. Main DC output Two M3.5 pan-head screw positions: −V at the upper position and +V at the lower position in the top-view drawing. Maximum torque: 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM, pin 2 +12 V auxiliary. Mating housing: TKP 2502; terminal: TKP 54T(LF) or equivalent. Sense / optional PG connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG when the optional signal is fitted. Mating housing: TKP DH2 family; terminal identified as TKP. JST VHR and TKP DH2 are housing-family references. Select full ordering references for the circuit count and wire assembly shown in the drawing; confirm the compatible crimp-terminal suffix where only a family or manufacturer is specified. Safety and Medical Integration Listed safety approvals CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: BS EN/EN62368-1, 60335-1, 61558-1/-2-16 and 60601-1 (version 3.2). UL: UL62368-1 and ANSI/AAMI ES60601-1 (version 3.2). CCC: GB4943.1. RCM: AS/NZS61558-1/-2-16. EAC: TP TC004. Means of patient protection Primary–secondary: 2 × MOPP; primary–earth: 1 × MOPP; secondary–earth: 1 × MOPP. Overvoltage categories and altitude OVC III under IEC/EN61558-1/-2-16 up to 2000 m. OVC II under IEC/EN/UL62368-1 and IEC/EN60335-1 up to 5000 m; OVC II under IEC/EN60601-1 up to 4000 m. SELV / ES1 scope This voltage version is within the catalogue 12–48 V listing: SELV under IEC/EN61558-2-16, and SELV/ES1 under IEC/EN/UL62368-1. Withstand voltage Input–output: 4 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC. Insulation resistance Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH. The series is suitable for integration in BF-type medical applications. MOPP stands for means of patient protection. Final equipment design and testing must establish the required patient protection, grounding, leakage-current and system compliance; the power supply alone does not certify the finished medical equipment. Electromagnetic Compatibility Conducted and radiated emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class B with FG in a Class I installation; Class A without FG in a Class II installation. BS EN/EN55014: Class B in Class I. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity framework BS EN/EN55035 and BS EN/EN61000-6-2. ESD BS EN/EN61000-4-2, level 4: 15 kV air and 8 kV contact. Radiated immunity BS EN/EN61000-4-3, level 3: 10 V/m from 80 MHz to 2.7 GHz; table 9 proximity-field tests at 9–28 V/m from 385 MHz to 5.78 GHz. EFT 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: >95% dip for 0.5 periods, 100% for 1 period, 30% for 25 periods, and >95% interruption for 250 periods. The EMC setup uses a 360 × 360 × 1 mm metal plate. The supply is an installation component; re-confirm safety and EMC compliance in the finished equipment. Weight, Reliability and Catalogue Single-unit catalogue weight 480 g (0.48 kg), explicitly listed per unit in the catalogue packing data; a packing reference, not a measured net or shipping-parcel weight. Packing 24 pieces / 13.7 kg / 1.10 CUFT. MTBF, minimum estimates 1963.2 thousand hours, Telcordia SR-332 (Bellcore); 310.9 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three years, subject to applicable terms. Catalogue LOP-600-SPEC, 2026-05-08; combined PDF pages 21–25.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-54

  MEAN WELL LOP-500-54 is a low-profile, single-output AC/DC power supply with active PFC. Its 54 V output is rated 324 W with natural convection or 502.2 W with 23 CFM airflow, with a 750.6 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-54. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 54 V. Natural-convection output 6 A / 324 W. Output with 23 CFM airflow 9.3 A / 502.2 W. Peak output, 3 seconds maximum 13.9 A / 750.6 W. Ripple and noise, maximum 250 mVp-p. Voltage adjustment 52–58 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 59.4–67.5 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 320 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 320 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-48

  MEAN WELL LOP-500-48 is a low-profile, single-output AC/DC power supply with active PFC. Its 48 V output is rated 321.6 W with natural convection or 499.2 W with 23 CFM airflow, with a 748.8 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-48. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 48 V. Natural-convection output 6.7 A / 321.6 W. Output with 23 CFM airflow 10.4 A / 499.2 W. Peak output, 3 seconds maximum 15.6 A / 748.8 W. Ripple and noise, maximum 250 mVp-p. Voltage adjustment 45.6–50.4 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 52.8–62.4 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 320 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 320 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-36

  MEAN WELL LOP-500-36 is a low-profile, single-output AC/DC power supply with active PFC. Its 36 V output is rated 320.4 W with natural convection or 500.4 W with 23 CFM airflow, with a 748.8 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-36. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 36 V. Natural-convection output 8.9 A / 320.4 W. Output with 23 CFM airflow 13.9 A / 500.4 W. Peak output, 3 seconds maximum 20.8 A / 748.8 W. Ripple and noise, maximum 250 mVp-p. Voltage adjustment 34.2–37.8 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 39.6–46.8 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 320 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 320 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-27

  MEAN WELL LOP-500-27 is a low-profile, single-output AC/DC power supply with active PFC. Its 27 V output is rated 321.3 W with natural convection or 499.5 W with 23 CFM airflow, with a 750.6 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-27. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 27 V. Natural-convection output 11.9 A / 321.3 W. Output with 23 CFM airflow 18.5 A / 499.5 W. Peak output, 3 seconds maximum 27.8 A / 750.6 W. Ripple and noise, maximum 200 mVp-p. Voltage adjustment 25.6–28.4 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 29.7–35.1 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 320 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 320 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-24

  MEAN WELL LOP-500-24 is a low-profile, single-output AC/DC power supply with active PFC. Its 24 V output is rated 321.6 W with natural convection or 501.6 W with 23 CFM airflow, with a 751.2 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-24. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 24 V. Natural-convection output 13.4 A / 321.6 W. Output with 23 CFM airflow 20.9 A / 501.6 W. Peak output, 3 seconds maximum 31.3 A / 751.2 W. Ripple and noise, maximum 200 mVp-p. Voltage adjustment 22.8–25.2 V using the SVR adjustment. Voltage tolerance ±2.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 94.5%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 26.4–31.2 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 320 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 320 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-18

  MEAN WELL LOP-500-18 is a low-profile, single-output AC/DC power supply with active PFC. Its 18 V output is rated 300.6 W with natural convection or 500.4 W with 23 CFM airflow, with a 750.6 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-18. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 18 V. Natural-convection output 16.7 A / 300.6 W. Output with 23 CFM airflow 27.8 A / 500.4 W. Peak output, 3 seconds maximum 41.7 A / 750.6 W. Ripple and noise, maximum 180 mVp-p. Voltage adjustment 17.1–18.9 V using the SVR adjustment. Voltage tolerance ±3.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 94.5%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 19.8–23.4 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 300 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 300 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-15

  MEAN WELL LOP-500-15 is a low-profile, single-output AC/DC power supply with active PFC. Its 15 V output is rated 300 W with natural convection or 499.5 W with 23 CFM airflow, with a 750 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-15. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 15 V. Natural-convection output 20 A / 300 W. Output with 23 CFM airflow 33.3 A / 499.5 W. Peak output, 3 seconds maximum 50 A / 750 W. Ripple and noise, maximum 150 mVp-p. Voltage adjustment 14.3–15.8 V using the SVR adjustment. Voltage tolerance ±3.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 94.5%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 16.5–19.5 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 300 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 300 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-500 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-500-12

  MEAN WELL LOP-500-12 is a low-profile, single-output AC/DC power supply with active PFC. Its 12 V output is rated 300 W with natural convection or 499.2 W with 23 CFM airflow, with a 750 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-500 Datasheet (PDF) The LOP-500 section is on PDF pages 16, 17, 18, 19, 20. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-500-12. Format LOP-500 open-frame power supply; 5 × 3-inch footprint and 30.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 12 V. Natural-convection output 25 A / 300 W. Output with 23 CFM airflow 41.6 A / 499.2 W. Peak output, 3 seconds maximum 62.5 A / 750 W. Ripple and noise, maximum 120 mVp-p. Voltage adjustment 11.4–12.6 V using the SVR adjustment. Voltage tolerance ±3.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 93.5%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 5.2 A at 115 VAC; 2.9 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 26 ms at 300 W load; 16 ms at 500 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 13.2–15.6 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 500 W through 50°C; plotted limits are 375 W at 60°C, 250 W at 70°C and 200 W at 80°C. Natural convection at 115 VAC 300 W through 40°C, then 250 W at 50°C, 200 W at 60°C and 150 W at 70°C. Natural convection at 230 VAC 300 W through 45°C, then 250 W at 60°C and 215 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 30.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 420 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.42 kg per unit; 24 pieces / 12 kg / 1.02 CUFT. MTBF, minimum estimates 1695.7 thousand hours, Telcordia SR-332 (Bellcore); 230.7 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-500-SPEC, 2026-05-08; PDF pages 16–20.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-54

  MEAN WELL LOP-400-54 is a low-profile, single-output AC/DC power supply with active PFC. Its 54 V output is rated 256.5 W with natural convection or 405 W with 23 CFM airflow, with a 599.4 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-54. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 54 V. Natural-convection output 4.75 A / 256.5 W. Output with 23 CFM airflow 7.5 A / 405 W. Peak output, 3 seconds maximum 11.1 A / 599.4 W. Ripple and noise, maximum 250 mVp-p. Voltage adjustment 52–58 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 59.4–67.5 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-48

  MEAN WELL LOP-400-48 is a low-profile, single-output AC/DC power supply with active PFC. Its 48 V output is rated 254.4 W with natural convection or 403.2 W with 23 CFM airflow, with a 600 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-48. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 48 V. Natural-convection output 5.3 A / 254.4 W. Output with 23 CFM airflow 8.4 A / 403.2 W. Peak output, 3 seconds maximum 12.5 A / 600 W. Ripple and noise, maximum 250 mVp-p. Voltage adjustment 45.6–50.4 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 52.8–62.4 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-36

  MEAN WELL LOP-400-36 is a low-profile, single-output AC/DC power supply with active PFC. Its 36 V output is rated 255.6 W with natural convection or 403.2 W with 23 CFM airflow, with a 601.2 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-36. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 36 V. Natural-convection output 7.1 A / 255.6 W. Output with 23 CFM airflow 11.2 A / 403.2 W. Peak output, 3 seconds maximum 16.7 A / 601.2 W. Ripple and noise, maximum 250 mVp-p. Voltage adjustment 34.2–37.8 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 39.6–46.8 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-27

  MEAN WELL LOP-400-27 is a low-profile, single-output AC/DC power supply with active PFC. Its 27 V output is rated 251.1 W with natural convection or 402.3 W with 23 CFM airflow, with a 599.4 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-27. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 27 V. Natural-convection output 9.3 A / 251.1 W. Output with 23 CFM airflow 14.9 A / 402.3 W. Peak output, 3 seconds maximum 22.2 A / 599.4 W. Ripple and noise, maximum 200 mVp-p. Voltage adjustment 25.6–28.4 V using the SVR adjustment. Voltage tolerance ±1.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 29.7–35.1 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-24

  MEAN WELL LOP-400-24 is a low-profile, single-output AC/DC power supply with active PFC. Its 24 V output is rated 252 W with natural convection or 400.8 W with 23 CFM airflow, with a 600 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-24. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 24 V. Natural-convection output 10.5 A / 252 W. Output with 23 CFM airflow 16.7 A / 400.8 W. Peak output, 3 seconds maximum 25 A / 600 W. Ripple and noise, maximum 200 mVp-p. Voltage adjustment 22.8–25.2 V using the SVR adjustment. Voltage tolerance ±2.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 94.5%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 26.4–31.2 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-18

  MEAN WELL LOP-400-18 is a low-profile, single-output AC/DC power supply with active PFC. Its 18 V output is rated 250.2 W with natural convection or 399.6 W with 23 CFM airflow, with a 599.4 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-18. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 18 V. Natural-convection output 13.9 A / 250.2 W. Output with 23 CFM airflow 22.2 A / 399.6 W. Peak output, 3 seconds maximum 33.3 A / 599.4 W. Ripple and noise, maximum 180 mVp-p. Voltage adjustment 17.1–18.9 V using the SVR adjustment. Voltage tolerance ±3.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 95%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 19.8–23.4 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-15

  MEAN WELL LOP-400-15 is a low-profile, single-output AC/DC power supply with active PFC. Its 15 V output is rated 250.5 W with natural convection or 400.5 W with 23 CFM airflow, with a 600 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-15. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 15 V. Natural-convection output 16.7 A / 250.5 W. Output with 23 CFM airflow 26.7 A / 400.5 W. Peak output, 3 seconds maximum 40 A / 600 W. Ripple and noise, maximum 150 mVp-p. Voltage adjustment 14.3–15.8 V using the SVR adjustment. Voltage tolerance ±3.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 94.5%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 16.5–19.5 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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  MEAN WELL LOP-400 series: Low-Profile Open-Frame AC/DC Power Supply with PFC - LOP-400-12

  MEAN WELL LOP-400-12 is a low-profile, single-output AC/DC power supply with active PFC. Its 12 V output is rated 249.6 W with natural convection or 399.6 W with 23 CFM airflow, with a 600 W peak limit for up to 3 seconds. Apply the model ratings and derating curves together. Product Datasheet Download MEAN WELL LOP-400 Datasheet (PDF) The LOP-400 section is on PDF pages 11, 12, 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation. Model and Selection Complete model LOP-400-12. Format LOP-400 open-frame power supply; 5 × 3-inch footprint and 27.5 mm profile. Cooling options Natural convection at the lower output rating; external 23 CFM airflow for the forced-air rating. System installation Class I with safety earth at the marked mounting holes, or Class II without safety earth; the corresponding EMC class limits apply. Designed for industrial automation, controls, security and network equipment, electronic instruments, home automation and appropriately integrated medical equipment. Output Ratings Nominal DC output 12 V. Natural-convection output 20.8 A / 249.6 W. Output with 23 CFM airflow 33.3 A / 399.6 W. Peak output, 3 seconds maximum 50 A / 600 W. Ripple and noise, maximum 120 mVp-p. Voltage adjustment 11.4–12.6 V using the SVR adjustment. Voltage tolerance ±3.0%, including set-up tolerance, line regulation and load regulation. Line / load regulation ±0.5% / ±1.0%. Efficiency, typical 94%. The peak rating is a short-duration limit, not a continuous output rating. Sustained loads must meet the applicable convection or forced-air current and power limits. Unless otherwise stated, parameters are measured at 230 VAC input, 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 80–264 VAC or 113–370 VDC; 47–63 Hz AC frequency. Power-factor correction Built-in active PFC; PF >0.95 at 230 VAC and >0.98 at 115 VAC, full load. AC input current, typical 4.2 A at 115 VAC; 2.1 A at 230 VAC. Cold-start inrush, typical 40 A at 115 VAC; 80 A at 230 VAC. No-load consumption Less than 0.5 W. Set-up / rise time 1000 ms / 30 ms at 230 VAC; 1500 ms / 30 ms at 115 VAC, full load. Hold-up time, typical 30 ms at 250 W load; 16 ms at 400 W load. Earth / touch leakage Earth leakage <500 µA rms and touch current <70 µA rms, each at 264 VAC. Block-diagram frequencies PFC 65 kHz; PWM 100 kHz. Protection and Functions Short circuit and overload 105–150% of rated output power; hiccup after 3 seconds, with automatic recovery after the fault is removed. Overvoltage 13.2–15.6 V; output shuts down, re-power on to recover. Overtemperature Output shuts down; recovery is automatic after cooling, or by re-power on. Fan auxiliary supply 12 V at 0.5 A for a fan with 23 CFM cooling, or 12 V at 0.2 A without a fan. Tolerance −15% to +15% at 20% main-output rated current. Remote sensing Compensates load-wiring voltage drop up to 0.5 V, using −R.S and +R.S on CN3. Power-good / power-fail option Optional PG/PF: signal high after power set-up with 10 ms < PG delay < 500 ms; low at least 1 ms before the output falls below 90% of its rated value. Low level 0–1 V; high level 2–5 V. Power-on indication LED indicator, identified in the mechanical drawing. PG/PF is an optional function. Confirm that the ordered configuration includes this option before using CN3 pin 4; its listing does not make the option standard on every unit. Cooling and Environment Working temperature −40 to +80°C, subject to the horizontal-installation curves. Convection curves end at 70°C; operation at 80°C requires the stated forced-air derating. 23 CFM thermal curve 400 W through 50°C; plotted limits are 325 W at 60°C, 250 W at 70°C and 130 W at 80°C. Natural convection at 115 VAC 250 W through 40°C, decreasing along the plotted curve to 80 W at 70°C. Natural convection at 230 VAC 250 W through 45°C; plotted limits are 160 W at 60°C and 120 W at 70°C. Input-voltage derating At 60 Hz: 70% load at 80 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Humidity and storage Operating: 20–90% RH, non-condensing. Storage: −40 to +85°C and 10–95% RH, non-condensing. Temperature coefficient ±0.03%/°C over 0–50°C. Vibration 10–500 Hz, 2 G; 10 minutes per cycle and 60 minutes along each X, Y and Z axis. The thermal curves are family power limits. Apply them together with the individual model’s output table and input-voltage derating; use the most restrictive applicable limit. Mechanical Installation Dimensions, L × W × H 127 × 76.2 × 27.5 mm; general drawing tolerance ±1 mm. Mounting pattern Four Ø3.5 mm holes; 115.6 × 64.8 mm center spans with 5.7 mm edge offsets. Underside clearance The drawing shows 3 mm maximum projection below the PCB; allow the required clearance. Airflow arrangement An external 23 CFM fan is shown 5 cm from the long board edge. The plan view gives a 63.5 mm lateral alignment reference; follow its airflow direction. Heat sinks HS1 and HS2 must not be shorted. Grounding For Class I installations, connect mounting holes marked with the earth symbol to safety earth. Class II installations do not require the safety-earth connection. Adjustment and fitted components The drawing identifies SVR, LED, FS1 and FS2. Use the complete mechanical drawing and manufacturer instructions when integrating the board. Connections and Mating Components AC input CN1 JST B3P-VH or equivalent: pin 1 AC/L, pin 2 no pin, pin 3 AC/N. CN1 mating components JST VHR housing family and JST SVH-21T-P1.1 contacts, or equivalents. Main DC output −V and +V screw terminals; M3.5 pan-head screws in two positions, maximum torque 8 lb-in (90 cNm). Fan connector CN2 TKP 8812-2 or equivalent: pin 1 DC COM; pin 2 +12Vaux. CN2 mating components TKP 2502 housing and TKP 54T(LF) terminals, or equivalents. Function connector CN3 TKP DH2I-2X2 or equivalent: pin 1 −R.S, pin 2 +R.S, pin 3 DC COM, pin 4 PG (optional). CN3 mating components TKP DH2 housing family or equivalent; select the matching TKP contact for the wire assembly. Select the complete mating housing for the required circuit count and wire size. Loose mating parts and an external fan are not stated as included; the fan-supply rating and installation drawing do not specify a particular fan model. Safety and Insulation Safety standards CB: IEC62368-1, IEC60335-1, IEC61558-1/-2-16 and IEC60601-1. TUV: corresponding BS EN/EN standards, including EN60601-1 version 3.2. UL: UL62368-1 and ANSI/AAMI ES60601-1 version 3.2. CCC GB4943.1; RCM AS/NZS61558-1/-2-16; EAC TP TC004. Medical isolation Primary to secondary: 2 × MOPP; suitable for BF medical applications when correctly incorporated into the final equipment. Primary to earth and secondary to earth: 1 × MOPP each. Overvoltage category and altitude IEC/EN61558-1/-2-16: OVC III up to 2000 m. IEC/EN/UL62368-1 and IEC/EN60335-1: OVC II up to 5000 m. IEC/EN60601-1: OVC II up to 4000 m. Safety voltage classification IEC/EN61558-2-16: SELV; IEC/EN/UL62368-1: SELV / ES1, within the listed 12–48 V model range. Withstand voltage Input/output 4 kVAC; input/FG 2 kVAC; output/FG 1.5 kVAC. Insulation resistance Input/output, input/FG and output/FG: 100 MΩ at 500 VDC, 25°C and 70% RH. This is a component power supply. Confirm the required insulation, earthing, leakage, enclosure and safety classification in the completed equipment; component approvals do not certify the entire assembly. EMC and Test Conditions Emissions BS EN/EN55032 (CISPR32) and BS EN/EN55011 (CISPR11): Class I Class B, Class II Class A, conducted and radiated. BS EN/EN55014: Class I Class B. Harmonics and flicker BS EN/EN61000-3-2 Class A; BS EN/EN61000-3-3. Immunity standards BS EN/EN55035 and BS EN/EN61000-6-2, with the listed EN61000-4 tests. ESD and radiated RF EN61000-4-2: Level 4, 15 kV air and 8 kV contact. 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. Other immunity levels EFT Level 3, 2 kV; surge Level 4, 4 kV line–FG and 2 kV line–line; conducted RF Level 3, 10 V; magnetic field Level 4, 30 A/m. Voltage dips and interruptions >95% dip for 0.5 period; 100% dip for 1 period; 30% dip for 25 periods; >95% interruption for 250 periods. EMC testing uses a 360 × 360 mm metal plate, 1 mm thick. Reconfirm EMC performance in the final equipment with its actual wiring and mounting arrangement. Weight, Reliability and Warranty Single-unit catalogue reference weight 390 g from the explicit per-unit PACKING value. This is a catalogue reference, not a measured net or shipping weight. Packing reference 0.39 kg per unit; 24 pieces / 11.5 kg / 1.00 CUFT. MTBF, minimum estimates 1696.4 thousand hours, Telcordia SR-332 (Bellcore); 231.2 thousand hours, MIL-HDBK-217F at 25°C. Manufacturer warranty Three-year manufacturer warranty, subject to applicable terms. Catalogue revision LOP-400-SPEC, 2026-05-08; PDF pages 11–15.

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