MEAN WELL LOP-300 Series 300W 4 Icnh ×2 Inch Low Profile Open Frame Power Supply Owner’s Manual
- June 15, 2024
- MEAN WELL
Table of Contents
MEAN WELL LOP-300 Series 300W 4 Icnh ×2 Inch Low Profile Open Frame Power
Supply

Product Usage Instructions
Step 1: Safety Precautions
Before using the LOP-300 series, please read and understand the safety precautions mentioned in the user manual. This will ensure safe and proper usage of the product.
Step 2: Installation
Follow these steps to install the LOP-300 series:
- Choose a suitable location for the power supply.
- Ensure that the input and output terminals are properly connected.
- Make sure the power supply is grounded according to the safety standards.
Step 3: Power Connection
- Connect the power supply to the input power source using the provided cables.
- Make sure the voltage and frequency of the input power source match the specifications mentioned in the user manual.
Step 4: Output Connection
- Connect the load or device that requires power to the output terminals of the power supply.
- Ensure that the polarity is correct and secure the connections properly.
Step 5: Adjusting Voltage (if required)
- If you need to adjust the output voltage, refer to the voltage adjustment range mentioned in the specifications.
- Follow the guidelines provided in the user manual to make the necessary adjustments.
Step 6: Power On
- Turn on the power supply using the power switch.
- The power supply will start providing power to the connected devices.
Frequently Asked Questions (FAQ)
- Q: What safety standards does LOP-300 series comply with?- A: The LOP-300 series complies with CB IEC62368-1, IEC60335-1, IEC61558-1/-2-16, IEC60601-1; TUV BS EN/EN62368-1, BS EN/EN60335-1, BS EN/EN61558-1/-2-16, BS EN/EN60601-1(3.2 Version); UL UL62368-1, ANSI / AAMI ES60601-1(3.2 Version); CCC GB4943.1; RCM AS/NZS 61558-1/-2-16; EAC TPTC 004 approved.
 
- Q: What is the working temperature range for LOP-300 series?- A: The working temperature range for LOP-300 series is -40°C to +80°C. Please refer to the Derating Curve for temperature-related performance adjustments.
 
- Q: Can I use LOP-300 series without a cooling fan?- A: The LOP-300 series requires a cooling fan for proper operation. The fan must provide 12V at 0.5A. If a fan is not used, the output current should not exceed 0.1A.
 
Features
- MEAN WELL Patent Number: ZL 202223277512.1
- 4″x2″ compact size with low profile (25.4mm)
- 80N264Vac input with PFC, No load power consumption<0.5W
- Global certificates in multi-fields- (ITE 62368-1, Medical 60601-1 , Household 60335-1,
- Industrial 61558-1/-2-16)
 
- 150%peak load @ 3s
- 180W convection, 300W with FAN 10.98CFM forced-cooled
- Suitable for Class I or Class II installations
- Over voltage category III (ovc III)
- -40 +800C wide range operation temperature
- High efficiency up to 94%
- Protections: Short circuit / Overload / Over voltage / Over temperature
- Extremely low leakage current
- Operating altitude up to 5000 meters
- Built-in 12V/0.5A for external FAN
- 3 years warranty
Applications
- Industrial automation machinery
- Industrial control system
- Mechanical and electrical equipment
- Electronic instruments, equipments or apparatus
- Power sourcing equipment of POE
- Medical devices
GTIN CODE
- MW Search: https://www.meanwell.com/serviceGTIN.aspx
Description
LOP-300 is a 300W highly reliable green PCB type low profile power supply with a high power density (37.5W/in3) on the 4″ by 2″ footprint. It accepts 80N264VAC input and offers various output voltages between 12V and 54V. The working efficiency is up to 94% and the extremely low no load powerconsumption is down below 0.5W.
LOP-300 is able to be used for both Class I (with FG) and Class n(no FG) system design. LOP-300 is equipped with complete protection functions; It is complied with the international safety regulations such as IEC/BS EN/EN/UL62368-1,lEC/BS EN/EN60335-1,lEC/BS EN/EN61558-1/-2-16, IEC/BS EN/EN60601-1.LOP-300 serves as a high price-to-performance power supply solution for various industrial applications. The extremely low leakage current is less than 500gA.ln addition, it conforms to the international medical regulations (2*MOPP) and EMC BS EN/EN55011 , perfectly fitting all kinds of BF rated “patient contact” medical system equipment.
Model Encoding

SPECIFICATION
MODEL|  LOP-300-12|  LOP-300-15|  LOP-300-18|
LOP-300-24|  LOP-300-27|  LOP-300-30|  LOP-300-36|
LOP-300-48|  LOP-300-54
---|---|---|---|---|---|---|---|---|---  
OUTPUT
| DC VOLTAGE| 12V| 15V| 18V| 24V| 27V| 30V| 36V| 48V| 54V
CURRENT
|  Peak(3sec.)|  37.5A| 30A| 25A| 18.8A| 16.7A| 15A| 12.5A| 9.4A| 8.3A
10.98CF  M|  25A| 20A| 16.7A| 12.5A| 11.1A| 10A| 8.3A| 6.3A| 5.6A
Convection|  15A| 12A| 10A| 7.5A| 6.7A| 6A| 5A| 3.8A| 3.4A  
RATED POWER
|  Peak(3sec.)|  450W| 450W| 450W| 450W| 450W| 450W| 450W| 450W| 450W
10.98CF  M|  300W| 300W| 300.6W| 300W| 299.7W| 300W| 299.8W|
302.4W| 302.4W
Convection|  180W| 180W| 180W| 180W| 180.9W| 180W| 180W| 182.4W| 183.6W
RIPPLE & NOISE (max.)
Note.2
|  120mVp-p| 150mVp-p| 180mVp-p| 200mVp-p| 200mVp-p| 250mVp-p| 250mVp-p|
250mVp-p| 250mVp-p
VOLTAGE ADJ. RANGE
(MAIN OUTPUT)
|  11.4~12.6V| 14.3~15.8V| 17.1~18.9V| 22.8~25.2V| 25.6 ~ 28.4V| 28.5 ~31.5V|
34.2 ~37.8V| 45.6 ~50.4V| 52 ~58V
VOLTAGE TOLERANCE
Note.3
|  ±3.0%| ±3.0%| ±3.0%| ±2.0%| ±1.0%| ±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%|
±0.5%
LOAD REGULATION|  ±1.0%| ±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.)|  16ms@180W load , 8ms@300W load  
INPUT
|  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.)|  92.5%| 93%| 93.5%| 93%| 93%| 93%| 94%| 94%| 94%
AC CURRENT (Typ.)|  3.5A/115VAC  1.8A/230VAC
INRUSH CURRENT (Typ.)|  COLD START 40A/115VAC        80A/230VAC
LEAKAGE CURRENT|  Earth leakage current < 500μA(rms) @ 264VAC , touch
current < 70μA(rms) @ 264VAC  
PROTECTION
| ****
OVERLOAD
| 105 ~ 150% rated output power, Protection type : Hiccup after 3 sec, recovers automatically(3 sec) after fault condition is removed
OVER VOLTAGE
|  13.2 ~ 15.6V| 16.5 ~ 19.5V| 19.8 ~ 23.4V| 26.4 ~ 31.2V| 29.7 ~ 35.1V| 33 ~
39V| 39.6 ~ 46.8V| 52.8 ~ 62.4V| 59.4 ~ 67.5V
Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE|  Protection type : Shut down o/p voltage, recovers
automatically after temperature goes down or re-power on to recover
FUNCTION|  EXTERNAL FAN SUPPLY|  12V@0.5A for driving a fan /
12V@0.1A without fan cooling ; (10.98CFM) tolerance -20% ~ +15% at main output
20% rated current  
ENVIRONMENT
|  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  
SAFETY & EMC
(Note 5)
| ****
SAFETY STANDARDS
| CB IEC62368-1, IEC60335-1, IEC61558-1/-2-16, IEC60601-1;
TUV BS EN/EN62368-1, BS EN/EN60335-1, BS EN/EN61558-1/-2-16, BS EN/EN60601-1(3.2 Version); UL UL62368-1, ANSI / AAMI ES60601-1(3.2 Version) ;
CCC GB4943.1 ; RCM AS/NZS 61558-1/-2-16; EAC TPTC 004 approved.
---|---|---
ISOLATION RESISTANCE|  Primary-Secondary:  2xMOPP,  Primary-Earth:1xMOPP,
Secondary-Earth:1xMOPP  
OVER VOLTAGE CATEGORY
|  IEC/EN 61558-1/-2-16(OVC Ⅲ, altitude up to 2000M ) IEC/EN/UL 62368-1 (OVC
Ⅱ, altitude up to 5000M ) IEC/EN 60335-1 (OVC Ⅱ, altitude up to 5000M ) IEC/EN
60601-1   (OVC Ⅱ, altitude up to 4000M )
PROTECTIVE EXTRA-LOW VOLTAGE|  IEC/EN61558-2-16 (SELV ) IEC/EN/UL
62368-1 (SELV / ES1 )
WITHSTAND VOLTAGE|  I/P-O/P:4KVAC  I/P-FG:2KVAC  O/P-FG:1.5KVAC
ISOLATION RESISTANCE|  I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC /
25℃/ 70% RH  
EMC EMISSION
| Parameter| Standard| Test Level / Note
Conducted & Radiated
| BS EN/EN55032(CISPR32) BS EN/EN55011(CISPR11)| ClassⅠ: Class B , Class Ⅱ:
Class A
BS EN/EN55014(CISPR32)| ClassⅠ: Class B
Harmonic Current| BS EN/EN61000-3-2| Class A
Voltage Flicker| BS EN/EN61000-3-3| ——-  
EMC IMMUNITY
|  BS EN/EN55035,BS EN/ EN61000-6-2
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 )
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,
>95% interruptions 250 periods
OTHERS
|  MTBF|  2805.6K hrs min.     Telcordia SR-332 (Bellcore) ;     384.4K
hrs min.     MIL-HDBK-217F (25℃)
DIMENSION|  101.650.8 25.4mm (LWH)
PACKING|  0.21Kg; 36pcs/10Kg/0.95CUFT  
NOTE
|
- All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25 of ambient temperature.
- Ripple & noise are measured at 20MHz of bandwidth by using a 1 2″ twisted pair-wire terminated with a 0.1 gf & 47gf parallel capacitor.
- Tolerance: includes set up tolerance, line regulation and load regulation.
- Derating may be needed under low input voltages. Please check the derating curve for more details.
- The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 360mm*360mm metal plate with 1 mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on http://www.meanwell.com)
Product Liability Disclaimer: For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx
Block Diagram

Derating Curve

| Cooling | Max. Output Power | 
|---|---|
| Free air convection | 180W | 
| Force-cooled with external Fan | 300W | 
Output Derating VS Input Voltage
Mechanical Specification
Unit: mm

AC Input Connector (CNI): JST B3P-VH or equivalent
| Pin No. | Assignment | Mating Housing | Terminal | 
|---|---|---|---|
| 1 | AC/L | JST VHR or equivalent | JST SVH-21T-P1.1 or equivalent | 
| 2 | No Pin | ||
| 3 | AC/N | 
DC Output Connector (CN2): JST B6P-VH or equivalent
| Pin No. | Assignment | Mating Housing | Terminal | 
|---|---|---|---|
| 1,2,3 | +V | JST VHR or equivalent | JST SVH-21T-P1.1 or equivalent | 
| 4,5,6 | -V | 
FAN Connector(CN101): JSTB2B-PH-K-S or equivalent
| Pin No. | Assignment | Mating Housing | Terminal | 
|---|---|---|---|
| 1 | +12V | JST PHR-2 or equivalent | JST SPH-002T-P0.5S or equivalent | 
| 2 | DC COM | 
Note
- Class I System: Mounting holes marked with have to be connected to safety earth.
- Class II System: Unnecessary to connect with safety earth.
More Information
Installation Manual
Please refer to: http://www.meanwell.com/webnet/search/lnstallationSearch.html
User’s Manual


Documents / Resources
| MEAN
WELL LOP-300 Series 300W 4 Icnh ×2 Inch Low Profile Open Frame Power
Supply
[pdf] Owner's Manual
LOP-300 Series 300W 4 Icnh 2 Inch Low Profile Open Frame Power Supply, LOP-300
Series, 300W 4 Icnh 2 Inch Low Profile Open Frame Power Supply, Profile Open
Frame Power Supply, Frame Power Supply, Power Supply
---|---
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