Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

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

Name: Mean Well LCM-40KN Power Supply 42W 350mA 500mA 600mA 700mA(default) 900mA 1050mA - KNX
Brand: Mean Well
SKU: LCM-40KN
Price: 51.92 USD
Availability: InStock

constant current model with multiple levels selectable by dip switchKNX protocolsynchronization up to 10 units

SKU LCM-40KN

$51.92 USD

Shipping calculated at checkout.

Notify me when it's back in stock

Your order will be processed within 24 hours

Overview

LCM-40KN is the model of this series: rated power 42W, typical efficiency 90%.

LCM-40KN series is a 40W AC/DC constant current mode output LED driver featuring the multiple levels selectable by dip switch and the KNX interface to avoid using the complicated KNX-DALI gateway. LCM-40KN operates from 180~295VAC and offers different current levels ranging between 350mA and 1050mA. Thanks to the high efficiency up to 90%, with the fanless design, the entire series is able to operate for -30℃~+90℃ case temperature under free air convection. In addition, LCM-40KN is equipped with push dimming 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
KNX/EIB protocol
Flicker free design
Support emergency lighting(EL)
Integrated constant light output
Integrated KNX push button interface
Synchronization up to 10units
Functions: Manual dim, operation hours, power consumption feedback, log/linear curve selection...etc
3 years warranty

Specifications

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

OUTPUT

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

INPUT

VOLTAGE RANGE^Note.2: 180 ~ 295VAC 220 ~ 392VDC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF≧0.975/230VAC, PF≧0.95/277VAC@ 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: 90%
AC CURRENT (Typ.): 0.23A/230VAC
INRUSH CURRENT (Typ.): COLD START 20A(twidth=310μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 21 units (circuit breaker of type B) / 35 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.5mA / 240VAC
STANDBY POWER CONSUMPTION^Note.6: <0.5W for Blank-Type, <1.2W for AUX-Type

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

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 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: ENEC BS EN/EN61347-1, BS EN/EN61347-2-13, BS EN/EN62384 independent, BIS IS15885(Part2/Sec13), EAC TP TC 004 approved, GB/T19510.1 and GB/T19510.213(by request) ; According to BS EN/EN50172, BS EN/EN 60598-2-22, BS EN/EN61347-2-13 appendix J suitable for emergency installations(EL)(AC Input: 200-240Vac)
KNX STANDARDS: Certified protocol
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: 1764.6K hrs min. Telcordia SR-332 (Bellcore) ; 190.4K 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 50%~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. 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).
9. To fulfill requirements of the latest ErP regulation for lighting fixtures, this LED power supply can only be used behind a switch without permanently connected to the mains.

Technical drawings

LCM-40KN LCM-40KN series — LCM-40KN series

LCM-40KN ※ CONSTANT LIGHT OUTPUT — ※ CONSTANT LIGHT OUTPUT

LCM-40KN ※PUSH dimming or AC/DC input monitor(Primary side) — ※PUSH dimming or AC/DC input monitor(Primary side)

LCM-40KN SYNCHRONIZATION OPERATION — SYNCHRONIZATION OPERATION

LCM-40KN SYNCHRONIZATION OPERATION (2) — SYNCHRONIZATION OPERATION (2)

LCM-40KN TEMPERATURE COMPENSATION — TEMPERATURE COMPENSATION

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

LCM-40KN TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

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

LCM-40KN EFFICIENCY vs LOAD — EFFICIENCY vs LOAD

LCM-40KN MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

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

Catalogues2

Mean Well Catalog (Industrial) PDF Download

Mean Well Building Automation Catalog PDF Download

FAQ

Can I use the LCM-40KN for KNX-controlled LED downlights?

Yes, this model is built for constant current LED loads and includes a certified KNX protocol interface, which makes it suitable for downlight systems tied into KNX control. The driver is rated at 42W, and the LED voltage must stay within the range of the selected current level (2-57V at the default 700mA, from 2-100V at 350mA to 2-40V at 1050mA).

Is the LCM-40KN suitable for LED signage modules in a KNX building system?

It can be used for signage modules if the modules are designed for constant current drive and the total load stays within 42W and the voltage range of the selected current level (2-57V at the default 700mA). It is not intended for constant voltage signage modules, even if the project uses KNX elsewhere.

Can this driver power a small LED array in a synchronized multi-fixture setup?

Yes, that is one of the more relevant use cases for this model because it supports synchronization of up to 10 drivers (1 master + 9 slaves). The LED array still needs to be a constant current load that fits within the DIP-switch selectable current settings, the 42W rating and the voltage range of the chosen current level.

How do I size LEDs for the LCM-40KN?

Match it to constant current LEDs whose combined forward voltage stays below the maximum LED voltage of the selected current level, e.g. 57V at the default 700mA, 100V at 350mA or 40V at 1050mA. The number of LEDs depends on each LED forward voltage, so you should size by total forward voltage instead of assuming a specific count.

Can the LCM-40KN handle hot operating conditions?

The working temperature is specified as a case temperature of Tcase -30°C to +90°C (max. case temperature +90°C), with load derating per the sheet's output load vs temperature curves. These specs do not list an IP rating, so environmental exposure should be judged at the fixture or enclosure level.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Model	Power	Voltage	Current	IP Rating	Price
Mean Well LCM-60KN Power Supply 60.3W 500mA 600mA 700mA(default) 900mA 1050mA 1400mA - KNX	60.3W	95V	700 Milliampere	IP20	$54.76	View
Mean Well LCM-25KN Power Supply 25W 350mA 500mA 600mA 700mA(default) 900mA 1050mA - KNX	18.9W	41V	700 Milliampere	IP20	$46.25	View

Please log in to write a review.