LOP-400-54

AC/DC Open Frame Power Supply (PSU), ITE, Industrial, Household, Medical, 1 Output, 256.5 W

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: MEAN WELL
Product type: AC / DC Open Frame Power Supplies
SVHC: No SVHC (25-Jun-2025)
Product Range: LOP-400 Series
No. of Outputs: 1 Output
Input Voltage VAC: 80V AC to 264V AC
Power Supply Output Type: Fixed
Output Current - Output 1: 7.5A
Output Current - Output 2: -
Output Current - Output 3: -
Output Current - Output 4: -
Output Voltage - Output 1: 54V
Output Voltage - Output 2: -
Output Voltage - Output 3: -
Output Voltage - Output 4: -
Power Supply Applications: ITE, Industrial, Household, Medical
Power Rating (Convection Cooling): 256.5W
Delivery and price
Units per pack	50
Price	42.99 €
Current stock	10+
Lead time	30 days
Datasheet
**- LOP 400  series** 

400W  5"×3" Low Profile Open Frame Power Supply 

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 https://www.meanwell.com/serviceGTIN.aspx 

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     μ   

■ **  ** ~~Lb[=]~~ 

   

_File Name:LOP-400-SPEC   2024-01-05_ 

**-** 400W  5"×3" Low Profile Open Frame Power Supply **LOP 400  series** 

## **SPECIFICATION** 

||**MODEL**<br>**DC VOLTAGE**<br>**Peak(3sec.)**<br>**CURRENT**<br>**Convection**<br>**Peak(3sec.)**<br>**Convection**<br>**RATED**<br>**POWER**<br>**RIPPLE & NOISE (max.)Note.2**<br>**OUTPUT**<br>**LINE REGULATION**<br>**VOLTAGE ADJ. RANGE**<br>**(MAIN OUTPUT)**<br>**LOAD REGULATION**<br>**VOLTAGE TOLERANCENote.3**<br>**SETUP, RISE TIME**<br>**HOLD UP TIME(Typ.)**<br>**VOLTAGE RANGE  Note.4**<br>**FREQUENCY RANGE**<br>**POWER FACTOR**<br>**EFFICIENCY(Typ.)**<br>**INPUT**<br>**AC CURRENT(Typ.)**<br>**INRUSH CURRENT(Typ.)**<br>**OVERLOAD**<br>**OVER VOLTAGE**<br>**PROTECTION**<br>**EXTERNAL FAN SUPPLY**<br>**OVER TEMPERATURE**<br>**REMOTE SENSE**<br>**POWER GOOD / POWER FAIL**<br>**(optional)**<br>**FUNCTION**<br>**WORKING TEMP.**<br>**WORKING HUMIDITY**<br>**STORAGE TEMP., HUMIDITY** <br>**TEMP. COEFFICIENT**<br>**ENVIRONMENT**<br>**VIBRATION**<br>**23CFM**<br>**23CFM**<br>**LEAKAGE CURRENT**|**MODEL**<br>**DC VOLTAGE**<br>**Peak(3sec.)**<br>**CURRENT**<br>**Convection**<br>**Peak(3sec.)**<br>**Convection**<br>**RATED**<br>**POWER**<br>**RIPPLE & NOISE (max.)Note.2**<br>**OUTPUT**<br>**LINE REGULATION**<br>**VOLTAGE ADJ. RANGE**<br>**(MAIN OUTPUT)**<br>**LOAD REGULATION**<br>**VOLTAGE TOLERANCENote.3**<br>**SETUP, RISE TIME**<br>**HOLD UP TIME(Typ.)**<br>**VOLTAGE RANGE  Note.4**<br>**FREQUENCY RANGE**<br>**POWER FACTOR**<br>**EFFICIENCY(Typ.)**<br>**INPUT**<br>**AC CURRENT(Typ.)**<br>**INRUSH CURRENT(Typ.)**<br>**OVERLOAD**<br>**OVER VOLTAGE**<br>**PROTECTION**<br>**EXTERNAL FAN SUPPLY**<br>**OVER TEMPERATURE**<br>**REMOTE SENSE**<br>**POWER GOOD / POWER FAIL**<br>**(optional)**<br>**FUNCTION**<br>**WORKING TEMP.**<br>**WORKING HUMIDITY**<br>**STORAGE TEMP., HUMIDITY** <br>**TEMP. COEFFICIENT**<br>**ENVIRONMENT**<br>**VIBRATION**<br>**23CFM**<br>**23CFM**<br>**LEAKAGE CURRENT**|**MODEL**<br>**DC VOLTAGE**<br>**Peak(3sec.)**<br>**CURRENT**<br>**Convection**<br>**Peak(3sec.)**<br>**Convection**<br>**RATED**<br>**POWER**<br>**RIPPLE & NOISE (max.)Note.2**<br>**OUTPUT**<br>**LINE REGULATION**<br>**VOLTAGE ADJ. RANGE**<br>**(MAIN OUTPUT)**<br>**LOAD REGULATION**<br>**VOLTAGE TOLERANCENote.3**<br>**SETUP, RISE TIME**<br>**HOLD UP TIME(Typ.)**<br>**VOLTAGE RANGE  Note.4**<br>**FREQUENCY RANGE**<br>**POWER FACTOR**<br>**EFFICIENCY(Typ.)**<br>**INPUT**<br>**AC CURRENT(Typ.)**<br>**INRUSH CURRENT(Typ.)**<br>**OVERLOAD**<br>**OVER VOLTAGE**<br>**PROTECTION**<br>**EXTERNAL FAN SUPPLY**<br>**OVER TEMPERATURE**<br>**REMOTE SENSE**<br>**POWER GOOD / POWER FAIL**<br>**(optional)**<br>**FUNCTION**<br>**WORKING TEMP.**<br>**WORKING HUMIDITY**<br>**STORAGE TEMP., HUMIDITY** <br>**TEMP. COEFFICIENT**<br>**ENVIRONMENT**<br>**VIBRATION**<br>**23CFM**<br>**23CFM**<br>**LEAKAGE CURRENT**|**LOP-400-12**|**LOP-400-15**|**LOP-400-18**|**LOP-400-24 **|**LOP-400-27 **|**LOP-400-36 **|**LOP-400-48**|**LOP-400-54**|
|---|---|---|---|---|---|---|---|---|---|---|---|
|||**DC VOLTAGE**||12V|15V|18V|24V|27V|36V|48V|54V|
|||**Peak(3sec.)**<br>**CURRENT**<br>**Convection**<br>**Peak(3sec.)**<br>**Convection**<br>**RATED**<br>**POWER**<br>**RIPPLE & NOISE (max.)Note.2**<br>**23CFM**<br>**23CFM**|**Peak(3sec.)**|50A|40A|33.3A|25A|22.2A|16.7A|12.5A|11.1A|
||||**23CFM**|33.3A|26.7A|22.2A|16.7A|14.9A|11.2A|8.4A|7.5A|
||||**Convection**|20.8A|16.7A|13.9A|10.5A|9.3A|7.1A|5.3A|4.75A|
||||**Peak(3sec.)**|600W|600W|599.4W|600W|599.4W|601.2W|600W|599.4W|
||||**23CFM**|399.6W|400.5W|399.6W|400.8W|402.3W|403.2W|403.2W|405W|
||||**Convection**|249.6W|250.5W|250.2W|252W|251.1W|255.6W|254.4W|256.5W|
|||||120mVp-p|150mVp-p|180mVp-p|200mVp-p|200mVp-p|250mVp-p|250mVp-p|250mVp-p|
|||**VOLTAGE ADJ. RANGE**<br>**(MAIN OUTPUT)**||11.4~12.6V|14.3~15.8V|17.1~18.9V|22.8~25.2V|25.6 ~ 28.4V|34.2 ~37.8V|45.6 ~50.4V|52 ~58V|
|||**VOLTAGE TOLERANCENote.3**||±3.0%|±3.0%|±3.0%|±2.0%|±1.0%|±1.0%|±1.0%|±1.0%|
|||**LINE REGULATION**||±0.5%|±0.5%|±0.5%|±0.5%|±0.5%|±0.5%|±0.5%|±0.5%|
|||**LOAD REGULATION**||±1.0%|±1.0%|±1.0%|±1.0%|±1.0%|±1.0%|±1.0%|±1.0%|
|||**SETUP, RISE TIME**||1000ms, 30ms/230VAC          1500ms, 30ms/115VAC at full load||||||||
|||**HOLD UP TIME(Typ.)**||30ms@250W load  ,  16ms@400W load||||||||
|||**VOLTAGE RANGE  Note.4**||80 ~ 264VAC          113 ~ 370VDC||||||||
|||**FREQUENCY RANGE**||47 ~ 63Hz||||||||
|||**POWER FACTOR**||PF>0.95/230VAC PF>0.98/115VAC at full load||||||||
|||**EFFICIENCY(Typ.)**||94%|94.5%|95%|94.5%|95%|95%|95%|95%|
|||**AC CURRENT(Typ.)**||4.2A/115VAC          2.1A/230VAC||||||||
|||**INRUSH CURRENT(Typ.)**||COLD START 40A/115VAC          80A/230VAC||||||||
|||**LEAKAGE CURRENT**||Earth leakage current<br>, touch current<br>< 500   A<br>< 70   A<br>(rms) @ 264VAC<br>(rms) @ 264VAC<br>μ<br>μ||||||||
|||**OVERLOAD**||105 ~ 150% rated output power,Protection type : Hiccup after 3 sec, recovers automatically<br>after fault condition is removed||||||||
|||**OVER VOLTAGE**||16.5 ~ 19.5V<br>29.7 ~ 35.1V 39.6 ~ 46.8V<br>13.2 ~ 15.6V<br>Protection type : Shut down o/p voltage, re-power on to recover<br>52.8 ~ 62.4V<br>26.4 ~ 31.2V<br>19.8 ~ 23.4V<br>59.4 ~ 67.5V||||||||
|||**OVER TEMPERATURE**||Protection type :Shut down o/p voltage, recovers automatically after temperature goes down or re-power on to recover||||||||
|||**EXTERNAL FAN SUPPLY**||12V@0.5A for driving a fan / 12V@0.2A for without fan ;<br>Tolerance -15% ~+15% at main output 20% rated current<br>**(**23CFM)||||||||
|||**REMOTE SENSE**||The remote sensing compensates voltage drop on the load wiring up to 0.5V||||||||
|||**POWER GOOD / POWER FAIL**<br>**(optional)**||500ms>PG>10ms ; The TTL signal goes high with 10ms to 500ms delay after power set up ;<br>The TTL signal goes low at least 1ms before Vo below 90% of rated value ; TTL(0 ~ 1V), TTH(2 ~ 5V)||||||||
|||**WORKING TEMP.**||-40 ~ +80℃(Refer to "Derating Curve")||||||||
|||**WORKING HUMIDITY**||20 ~ 90% RH non-condensing||||||||
|||**STORAGE TEMP., HUMIDITY**||-40 ~ +85℃, 10 ~ 95% RH non-condensing||||||||
|||**TEMP. COEFFICIENT**||±0.03%/℃(0 ~ 50℃)||||||||
|||**VIBRATION**||10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes||||||||



_File Name:LOP-400-SPEC   2024-01-05_ 

**-** 400W  5"×3" Low Profile Open Frame Power Supply **LOP 400  series** 

||**SAFETY &**<br>**EMC**<br>**(Note 5)**<br>**OTHERS**<br>**NOTE**|**SAFETY STANDARDS**|CB    IEC62368-1, IEC60335-1, IEC61558-1/-2-16, IEC60601-1;<br>TUV  BS EN/EN62368-1, BS EN/EN60335-1, BS EN/EN61558-1/-2-16, BS EN/EN60601-1<br>;<br>(3.2 Version)<br>UL    UL62368-1,<br>;<br>ANSI / AAMI ES60601-1(3.2 Version)<br>CCC GB4943.1 ;  RCM  AS/NZS 61558-1/-2-16;  EAC  TPTC 004 approved.|CB    IEC62368-1, IEC60335-1, IEC61558-1/-2-16, IEC60601-1;<br>TUV  BS EN/EN62368-1, BS EN/EN60335-1, BS EN/EN61558-1/-2-16, BS EN/EN60601-1<br>;<br>(3.2 Version)<br>UL    UL62368-1,<br>;<br>ANSI / AAMI ES60601-1(3.2 Version)<br>CCC GB4943.1 ;  RCM  AS/NZS 61558-1/-2-16;  EAC  TPTC 004 approved.|CB    IEC62368-1, IEC60335-1, IEC61558-1/-2-16, IEC60601-1;<br>TUV  BS EN/EN62368-1, BS EN/EN60335-1, BS EN/EN61558-1/-2-16, BS EN/EN60601-1<br>;<br>(3.2 Version)<br>UL    UL62368-1,<br>;<br>ANSI / AAMI ES60601-1(3.2 Version)<br>CCC GB4943.1 ;  RCM  AS/NZS 61558-1/-2-16;  EAC  TPTC 004 approved.|
|---|---|---|---|---|---|
|||**ISOLATION LEVEL**|Primary-Secondary: 2xMOPP, Primary-Earth:1xMOPP, Secondary-Earth:1xMOPP|||
|||**OVER VOLTAGE CATEGORY**|IEC/EN 61558-1/-2-16(<br>altitude up to 2000M )<br>OVCⅢ,<br>IEC/EN/UL 62368-1    (OVCⅡ, altitude up to 5000M )<br>IEC/EN 60335-1         (OVCⅡ, altitude up to 5000M )<br>IEC/EN 60601-1         (OVCⅡ, altitude up to 4000M )|||
|||**PROTECTIVE EXTRA-**<br>**LOW VOLTAGE**|IEC/EN61558-2-16 (SELV, 12~48V )<br>IEC/EN/UL 62368-1 (SELV / ES1, 12~48V )|||
|||**WITHSTAND VOLTAGE**|I/P-O/P:4KVAC     I/P-FG:2KVAC     O/P-FG:1.5KVAC|||
|||**EMC IMMUNITY**<br>**EMC EMISSION**<br>**ISOLATION RESISTANCE**|I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH|||
||||**Parameter**|**Standard**|**Test Level / Note**|
||||Conducted & Radiated<br>Harmonic Current|BS EN/EN55032(CISPR32)<br>BS EN/EN55011(CISPR11)|ClassⅠClass B , ClassⅡ: Class A<br>:|
|||||BS EN/EN55014(CISPR32)|ClassⅠClass B<br>:|
|||||BS EN/EN61000-3-2|Class A|
||||Voltage Flicker|BS EN/EN61000-3-3|-------|
||||EN61000-6-2<br>BS EN/EN55035,BS EN/|||
||||**Parameter**|**Standard**|**Test Level /Note**|
||||ESD|BS EN/EN61000-4-2|Level 4, 15KV air ; Level 4, 8KV contact|
||||Radiated Susceptibility|BS EN/EN61000-4-3|Level 3, 10V/m( 80MHz~2.7GHz )<br>Table 9, 9~28V/m( 385MHz~5.78GHz )|
||||EFT/Burest|BS EN/EN61000-4-4|Level 3, 2KV|
||||Surge|BS EN/EN61000-4-5|Level 4,  4KV/Line-FG ; 2KV/Line-Line|
||||Conducted|BS EN/EN61000-4-6|Level 3, 10V|
||||Magnetic Field|BS EN/EN61000-4-8|Level 4, 30A/m|
||||Voltage Dips and interruptions|BS EN/EN61000-4-11|＞95% dip 0.5 periods, 100% dip 1 periods, 30% dip 25 periods,<br>＞95% interruptions 250 periods|
|||**MTBF**|1696.4K hrs min.      Telcordia SR-332 (Bellcore) ;      231.2K hrs min.      MIL-HDBK-217F (25℃)|||
|||**DIMENSION**|127*76.2*27.5mm (L*W*H)|||
|||**PACKING**|0.39Kg; 24pcs/11.5Kg/1.0CUFT|||
|||<br><br>℃<br><br><br><br><br><br><br><br>(as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)<br>※：<br>μ<br>μ||||



_File Name:LOP-400-SPEC   2024-01-05_ 

## **-** 400W  5"×3" Low Profile Open Frame Power Supply **LOP 400  series** ~~a~~ 

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P| Block Diagram<br>PFC fosc : 65KHz<br>PWM fosc : 100KHz<br>RECTIFIERS<br>¢ & +12V  FAN supply<br>FILTER<br>+S<br>EMI RECTIFIERS POWER RECTIFIERS +V<br>I/P & &<br>FILTER SWITCHING -V<br>PFC FILTER<br>-S<br>PG/PF(optional)<br>DETECTION<br>FG<br>CIRCUIT<br>O.L.P. CONTROL<br>O.V.P.<br>© rd S/<br>P| Derating Curve<br>With 23CFM Fan<br>325<br>115VAC Convection<br>160<br>130<br>230VAC Convection<br>Ss)<br>-40 0 10 20 30 40 50 60 70 80 (HORIZONTAL)<br>AMBIENT TEMPERATURE ( ℃ )<br>Cooling Max. Output Power<br>Free air convection 250W<br>Force-cooled with external Fan 400W<br>r] Output Derating VS Input Voltage<br>100<br>90<br>80<br>70<br>60<br>50<br>40<br>80 100 115 120 140 160 180 200 220 240 264<br>INPUT VOLTAGE (VAC) 60Hz<br>LOAD (W)<br>LOAD (%)<br>**----- End of picture text -----**<br>


_File Name:LOP-400-SPEC   2024-01-05_ 

**-** 400W  5"×3" Low Profile Open Frame Power Supply **LOP 400  series** 

## **Mechanical Specification** 

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**----- Start of picture text -----**<br>
Unit:mm<br>127<br>5.7 115.6<br>SVR<br>CN2<br>HS1 LED 21 42 31 CN3<br>FS1<br>3 -V<br>CN12<br>1<br>+V<br>FS2<br>FG<br>HS2<br>cd g° {o]<br>Air flow<br>direction<br>a i]<br>FAN 23CFM<br>J<br>63.5<br>AC Input Connector (CN1) : JST B3P-VH or equivalent FAN Connector(CN2) : TKP 8812-2 or equivalent<br>Pin No. Assignment Mating Housing Terminal Pin No. Assignment Mating Housing Terminal<br>1 AC/L 1 DC COM TKP 2502 TKP 8811<br>JST VHR JST SVH-21T-P1.1<br>2 No Pin 2 +12Vaux or equivalent or equivalent<br>or equivalent or equivalent<br>ee 3 AC/N<br>Function Connector(CN3): TKP DH2I-2X2 or equivalent<br>DC Output Connector<br>Pin No. Assignment Mating Housing Terminal<br>Assignment Output Terminals<br>1 -R.S<br>-V M3.5 Pan HD screw in 2 positions<br>2 +R.S TKP DH2 TKP<br>+V Torque to 8 lbs-in(90cNm)max.<br>3 DC COM or equivalent or equivalent<br>SoS ES 4 PG(optional)<br>Note:<br>Class Ⅰ System: Mounting holes marked with have to be connected to safety earth.<br>Class Ⅱ System: Unnecessary to connect with safety earth.<br><br>35.<br>φ<br>5.7 4-<br>64.8<br>76.2<br>5cm<br>27.5±1<br>3 max.<br>**----- End of picture text -----**<br>


## **Installation Manual** 

Please refer to : http://www.meanwell.com/webnet/search/InstallationSearch.html 

_File Name:LOP-400-SPEC   2024-01-05_
Updated at June 10, 2026
About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
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Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
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Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →