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Mean Well LCM-40 Power Supply 42W 350mA 500mA 600mA 700mA(default) 900mA 1050mA - Dimmable

selectable output current using dip switchflicker-freeClass II without FGbuilt-in 3 in 1 dimming

SKU LCM-40

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Overview

LCM-40 is the model of this series: rated power 42W, typical efficiency 91%.

LCM-40 series is a 40W LED AC/DC constant current mode output LED driver featuring the multiple levels selectable by dip switch. LCM-40 operates from 180~295VAC and offers different current levels ranging between 350mA and 1050mA. Thanks to the efficiency up to 92%, with the fanless design, the entire series is able to operate for -30℃~+90℃ case temperature under free air convection. LCM-40 is equipped with various functions, such as the dimming function and synchronization, so as to provide the optimal design flexibility for LED lighting system.

Features

Constant Current mode output with multiple levels selectable by dip switch
Plastic housing with class II design
Built-in active PFC function
Standby power consumption <1W
Functions: 3 in 1 dimming (dim-to-off); Auxiliary DC output; synchronization up to 10 units
Optional: Wireless LED driver with integrated EnOcean module
3 years warranty

Specifications

LCM-40Specifications from the official datasheet (2026-02-09 edition)

OUTPUT

CURRENT LEVEL: Current level selectable via DIP switch, please refer to "DIP SWITCH TABLE" section: 350mA / 500mA / 600mA / 700mA(default) / 900mA / 1050mA
RATED POWER: 42W
DC VOLTAGE RANGE: 2 ~ 100V (350mA) / 2 ~ 80V (500mA) / 2 ~ 67V (600mA) / 2 ~ 57V (700mA) / 2 ~ 45V (900mA) / 2 ~ 40V (1050mA)
OPEN CIRCUIT VOLTAGE (max.): 110V (350mA / 500mA / 600mA) / 65V (700mA / 900mA / 1050mA)
CURRENT RIPPLE^Note.5: 5.0% max. @rated current
CURRENT TOLERANCE: ±5%
AUXILIARY DC OUTPUT: Nominal 12V(deviation 11.4~12.6V)@50mA
SETUP TIME^Note.3: 500ms / 230VAC

INPUT

VOLTAGE RANGE^Note.2: 180 ~ 295VAC 254 ~ 417VDC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF≧0.975/230VAC, PF≧0.96/277VAC @full load (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION: THD< 20%(@load≧75%) (Please refer to "TOTAL HARMONIC DISTORTION(THD)" section)
EFFICIENCY (Typ.)^Note.4: 91%
AC CURRENT (Typ.): 0.23A/230VAC 0.2A/277VAC
INRUSH CURRENT (Typ.): COLD START 20A(twidth=260μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 26 units (circuit breaker of type B) / 44 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.5mA / 240VAC
STANDBY POWER CONSUMPTION^Note.6: <1W

PROTECTION

SHORT CIRCUIT: Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE: 110 ~ 130V Shutdown o/p voltage, re-power on to recover
OVER TEMPERATURE: Shutdown o/p voltage,re-power on to recover

FUNCTION

WIRELESS PROTOCOL(Optional): EnOcean standard 868 MHz; Max. device(switch) saved into the memory : 33
DIMMING: Please refer to "DIMMING OPERATION" section
SYNCHRONIZATION: Please refer to "SYNCHRONIZATION OPERATION" section
TEMP. COMPENSATION: By external NTC, please refer to "TEMPERATURE COMPENSATION OPERATION"section

ENVIRONMENT

WORKING TEMP.: Tcase=-30 ~ +90℃ (Please refer to " OUTPUT LOAD vs TEMPERATURE" section)
MAX. CASE TEMP.: Tcase=+90℃
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 40℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: Ul8750, CSA C22.2 No.250.13-12, ENEC BS EN/EN61347-1, BS EN/EN61347-2-13, BS EN/EN62384 independent,GB/T19510.1, GB/T19510.213, BIS IS15885, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC
ISOLATION RESISTANCE: I/P-O/P:>100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION^Note.7: Compliance to BS EN/EN55015, BS EN/EN61000-3-2 Class C(@load≧40%) ; BS EN/EN61000-3-3; GB/T 17743, GB17625.1, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN61547, light industry level(surge immunity Line-Line 2KV), EAC TP TC 020

OTHERS

MTBF: 2397.0K hrs min. Telcordia SR-332 (Bellcore) ; 260.6K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 123.5*81.5*23mm (L*W*H)
PACKING: 0.24Kg ; 54pcs/15Kg/1.12CUFT

Test conditions and notes9

1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
2. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
3. Length of set up time is measured at first cold start. Turning ON/OFF the driver may lead to increase of the set up time.
4. Efficiency is measured at 500mA/80V output set by DIP switch.
5. Current ripple is measured 60%~100% of maximum voltage under rated power delivery.
6. Standby power consumption is measured at 180~230VAC.
7. The driver is considered as a component that will be operated in combination with final equipment. Since EMC performance will be affected by the complete installation, the final equipment manufacturers must re-qualify EMC Directive on the complete installation again. (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)
8. To fulfill requirements of the latest ErP regulation for lighting fixtures, this LED driver can only be used behind a switch without permanently connected to the mains.
9. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).

Technical drawings

LCM-40 DIMMING OPERATION — DIMMING OPERATION

LCM-40 TEMPERATURE COMPENSATION — TEMPERATURE COMPENSATION

LCM-40 OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

LCM-40 TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

LCM-40 POWER FACTOR (PF) CHARACTERISTIC — POWER FACTOR (PF) CHARACTERISTIC

LCM-40 EFFICIENCY vs LOAD — EFFICIENCY vs LOAD

LCM-40 MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

LCM-40 Installation & Pairing — Installation & Pairing

LCM-40 Batteryless wireless switch supplier — Batteryless wireless switch supplier

LCM-40 World Coverage Map — World Coverage Map

Typical applications

LED indoor lighting
LED office lighting
LED architectural lighting
LED panel lighting

Downloads

Certificates4

UL Certificate(LCM-40)(EN) PDF Download

CB Certificate(LCM-40)(EN) PDF Download

ENEC Certificate(LCM-40)(EN) PDF Download

EMC Certificate(LCM-40)(EN) PDF Download

Test reports1

Test Report (LCM-40)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the LCM-40 for higher-power LED downlights?

Yes, the LCM-40 is a constant current LED driver rated at 42W with a 700mA default output. At 700mA its CC range is 2-57V, and the DIP switch lets you select 350mA to 1050mA for LED downlights that need a different drive current.

Is the LCM-40 suitable for larger signage LED modules?

It can be suitable when the signage modules are built for constant current operation rather than constant voltage. This model delivers 700mA across a 2-57V CC range by default and is rated at 42W, with other current levels from 350mA to 1050mA selectable by DIP switch.

Can the LCM-40 power a small or mid-size LED array?

Yes, the LCM-40 is designed for constant current LED loads and is rated at 42W. With a 2-57V output range at the 700mA default, and ranges from 2-100V at 350mA to 2-40V at 1050mA, it can be matched to a range of constant current LED arrays.

How do I check compatibility for the LCM-40?

Confirm that your LEDs require a constant current driver and that their total forward voltage stays within the CC output range of the selected current: 2-57V at the 700mA default (2-100V at 350mA down to 2-40V at 1050mA). The number of LEDs depends on the forward voltage of each LED, so compatibility should be based on forward-voltage total rather than a fixed LED count or constant voltage assumption.

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