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Mean Well LOP-600-18 600W 5"×3" Low Profile Open Frame Power Supply 18V 20A

conventional 400W600W if using fanhigh frequency up to 95%

SKU LOP-600-18

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Overview

LOP-600-18 is the 18V output model of this series: typical efficiency 94%.

The LOP-600 is a 600W highly reliable, energy-efficient, low-profile open frame type power supply. With a high power density of 30.3W/in³ within the standard size of 5" × 3", it features a universal input voltage range of 80~264VAC, making it suitable for global applications. The series offers a comprehensive selection of standard voltages, including 12V/15V/18V/24V/27V/36V/48V/54V, and comes in a complete range of models. The main features of the LOP-600 include: low standby power (<0.5W), high efficiency (up to 95%), capable of providing 400W under natural air cooling and 600W with an additional fan. It has a 150% @ 3 seconds overload capacity, a wide operating temperature range of -40 to +80℃, compliance with OVC III, suitable for Class I (with FG) or Class II (without FG) systems. The product has obtained multiple safety certifications, including 62368-1/60601-1/61558-1/60335-1, and is designed to meet 2xMOPP and extremely low touch leakage current <70 μ A, making it suitable for BF class medical devices. With high product safety and excellent EMC performance, it is versatile and applicable in various fields such as ITE, medical, industrial control, home automation and more. It is a cost-effective slim open frame type power supply.

Features

MEAN WELL Patent Number: ZL 202223277512.1
5"×3" compact size with low profile (12V: 35mm ,15~54V: 33.5mm )
80~264Vac 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
400W convection, 600W with FAN 23CFM forced-cooled
Suitable for Class Ⅰor Class Ⅱ installations
Overvoltage category Ⅲ (OVC Ⅲ)
-40 ~ +80℃ wide range operation temperature
High efficiency up to 95%
Protections: Short circuit / Overload / Over voltage / Over temperature
Extremely low leakage current, 2 x MOPP, suitable for BF medical applications
Operating altitude up to 5000 meters
Built-in 12V/0.5A for external FAN
Built-in Remote sense
3 years warranty

Specifications

LOP-600-18Specifications from the official datasheet (2026-06-17 edition)

OUTPUT

DC VOLTAGE: 18V
CURRENT Peak(3sec.): 50A
CURRENT 23CFM: 33.3A
CURRENT Convection: 20A
RATED POWER Peak(3sec.): 900W
RATED POWER 23CFM: 599.4W
RATED POWER Convection: 360W
RIPPLE & NOISE (max.)^Note.2: 180mVp-p
VOLTAGE ADJ. RANGE (MAIN OUTPUT): 17.1~18.9V
VOLTAGE TOLERANCE^Note.3: ±3.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 1000ms, 50ms/230Vac 1500ms, 50ms/115Vac at full load
HOLD UP TIME (Typ.): 12ms@400W load , 8ms@600W 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.): 94%
AC CURRENT (Typ.): 6.4A/115Vac 3.2A/230Vac
INRUSH CURRENT (Typ.): COLD START 40A/115Vac 80A/230Vac
LEAKAGE CURRENT: ClassⅠ: Earth leakage current < 500 μA (rms) @ 264V ac , touch current < 70μA (rms) @ 264V ac ClassⅡ: Touch current < 100 μA (rms) @ 264V ac

PROTECTION

OVERLOAD: 105 ~ 150% rated output power, Protection type : Hiccup after 3 sec, recovers automatically after fault condition is removed
OVER VOLTAGE: 19.8 ~ 23.4V 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 (23CFM) / 12V@0.2A for without fan; Tolerance -15% ~+15% at main output 20% rated current
REMOTE SENSE: The remote sensing compensates voltage drop on the load wiring up to 0.5V
POWER GOOD / POWER FAIL (optional): 500ms>PG>10ms ; The TTL signal goes high with 10ms to 500ms delay after power set up ; The TTL signal goes low at least 1ms before Vo below 90% of rated value; TTL(0 ~ 1V), TTH(2 ~ 5V)

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

SAFETY STANDARDS^Note.5: 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, 12~48V ) 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
ISOLATION RESISTANCE: I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted & Radiated BS EN/EN55032(CISPR32) BS EN/EN55011(CISPR11) ClassⅠ: Class B , Class Ⅱ: Class A
Conducted & Radiated 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

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

Parameter	Standard	Test Level
Conducted & Radiated	BS EN/EN55032(CISPR32) BS EN/EN55011(CISPR11)	ClassⅠ: Class B , Class Ⅱ: Class A
Conducted & Radiated	BS EN/EN55014(CISPR32)	ClassⅠ: Class B
Harmonic Current	BS EN/EN61000-3-2	Class A
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
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: 1963.2K hrs min. Telcordia SR-332 (Bellcore) ; 310.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 12V: 127*76.2*35mm (L*W*H) , 15~54V: 127*76.2*33.5mm (L*W*H)
PACKING: 0.48Kg; 24pcs/13.7Kg/1.10CUFT

Test conditions and notes5

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltages. Please check the derating curve for more details.
5. 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 1mm 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 https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)

Technical drawings

LOP-600-18 LOP-600 series — LOP-600 series

LOP-600-18 Derating Curve — Derating Curve

LOP-600-18 Output Derating VS Input Voltage — Output Derating VS Input Voltage

Typical applications

Industrial automation machinery/ control system
Security system
Mechanical and electrical equipment
Electronic instruments, equipments or apparatus
Network equipment
Telecom devices
Power sourcing equipment of PoE
Home automation
Medical devices

Downloads

Datasheet1

LOP-600-18 datasheetLOP-600-SPEC.PDF · 2026-06-17 edition PDF Download

FAQ

What is the Mean Well LOP-600-18 designed for?

The Mean Well LOP-600-18 is a 600W low profile open frame AC-DC power supply that provides an 18V output. It is intended for space-constrained equipment that needs high power density, including industrial, ITE, household, and certain medical-related applications supported by its listed certifications.

What are the key electrical ratings of the LOP-600-18?

This model delivers 18V DC output rated 33.3A (599.4W) with 23CFM forced-air cooling, or 20A (360W) under convection. It accepts a wide 80 to 264VAC input range and also supports 113 to 370VDC input.

How compact is the Mean Well LOP-600-18?

The LOP-600-18 uses a compact 5 inch by 3 inch footprint. For the 15V to 54V versions, including this 18V model, the dimensions are 127 x 76.2 x 33.5 mm, which helps when enclosure height is limited.

Can the LOP-600-18 operate in demanding temperature conditions?

Yes. This power supply is rated for operation from -40°C to +80°C when used within the manufacturer's derating guidance. Under IEC/EN/UL 62368-1 it is also rated for altitudes up to 5000 meters (OVC II), making it suitable for challenging environments.

What certifications and safety standards does the LOP-600-18 support?

The LOP-600-18 is listed with multiple safety standards covering ITE, medical, household, and industrial categories, including IEC/EN/UL 62368-1, IEC 60601-1, IEC 60335-1, and IEC 61558-1/-2-16. Its primary-to-secondary isolation is also specified as 2 x MOPP per the provided specification.

What cooling and load capability does this model offer?

The LOP-600-18 is rated for 360W under convection cooling and up to 600W with 23CFM forced-air cooling. It also supports 150% peak load for 3 seconds, which can help with short-duration load surges.

What protection features are included in the Mean Well LOP-600-18?

This model includes protection for overload, overvoltage, and overtemperature conditions. According to the specification, overload protection uses hiccup mode after 3 seconds, while overvoltage and overtemperature protection shut down output until recovery conditions are met.

Payment & Security

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Model	Power	Voltage	Current
Mean Well LOP-600-54 600W 5"×3" Low Profile Open Frame Power Supply 54V 7.4A	399.6W	54V	7.4A	View
Mean Well LOP-600-48 600W 5"×3" Low Profile Open Frame Power Supply 48V 8.3A	398.4W	48V	8.3A	View
Mean Well LOP-600-36 600W 5"×3" Low Profile Open Frame Power Supply 36V 11.1A	399.6W	36V	11.1A	View
Mean Well LOP-600-27 600W 5"×3" Low Profile Open Frame Power Supply 27V 14.8A	399.6W	27V	14.8A	View
Mean Well LOP-600-24 600W 5"×3" Low Profile Open Frame Power Supply 24V 16.7A	400.8W	24V	16.7A	View
Mean Well LOP-600-15 600W 5"×3" Low Profile Open Frame Power Supply 15V 24A	360W	15V	24A	View
Mean Well LOP-600-12 600W 5"×3" Low Profile Open Frame Power Supply 12V 30A	360W	12V	30A	View

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