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Mean Well PWM-40-24 Power Supply 40W 24V - Dimmable 1.67A

PWM style outputfully isolated plastic caseIP67Class II design without FGbuilt-in 3 in 1 dimming

SKU PWM-40-24

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PWM-40-24

PWM-40-24 Fixed output In stock

PWM-60-24 Dimmable Low stock

PWM-60-24DA DALI Backorder

PWM-60-24DA2 DALI2 In stock

PWM-90-24 Dimmable In stock

PWM-90-24DA DALI Backorder

PWM-90-24DA2 DALI2 In stock

Product variants

In stock

Overview

PWM-40-24 is the 24V output model of this series: rated current 1.67A, rated power 40.08W, typical efficiency 89%.

PWM-40 series is a 40W LED AC/DC LED driver featuring the constant voltage mode with PWM style output, which is able to maintain the color temperature and the brightness homogeneity when driving all kinds of LED strips. PWM-40 operates from 90～305VAC and offers models with different rated voltage ranging between 12V and 48V. Thanks to the high efficiency up to 90%, with the fanless design, the entire series is able to operate for -40℃ ~ +85℃ case temperature under free air convection. The entire series is rated with IP67 ingress protection level and is suitable to work for dry, damp or wet locations. PWM-40 is equipped with dimming function that varies the duty cycle of the output, providing great flexibility for LED strips applications.

Features

Constant Voltage PWM style output with frequency 1.47kHz
Plastic housing with class II design
Built-in active PFC function
Class 2 power unit
No load power consumption <0.5W
Fully encapsulated with IP67 level
Function: 3 in 1 dimming (dim-to-off)
Typical lifetime>50000 hours
5 years warranty

Specifications

PWM-40-24Specifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 24V
RATED CURRENT: 1.67A
RATED POWER: 40.08W
DIMMING RANGE: 0 ~ 100%
PWM FREQUENCY (Typ.): 1.47kHz
SETUP, RISE TIME^Note.2: 500ms, 80ms 115VAC / 230VAC
HOLD UP TIME (Typ.): 16ms/115VAC or 230VAC

INPUT

VOLTAGE RANGE^Note.3: 90 ~ 305VAC 127 ~ 431VDC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.97/115VAC, PF>0.95/230VAC, PF>0.92/277VAC @ full load (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION: THD< 20%(@load≧60%/115VAC, 230VAC; @load≧75%/277VAC) (Please refer to "TOTAL HARMONIC DISTORTION" section)
EFFICIENCY (Typ.): 89%
AC CURRENT (Typ.): 0.6A / 115VAC 0.3A / 230VAC 0.25A / 277VAC
INRUSH CURRENT (Typ.): COLD START 50A(twidth=270μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. NO. of PSUs on 16A CIRCUIT BREAKER: 9 units (circuit breaker of type B) / 16 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.25mA / 277VAC
NO LOAD POWER CONSUMPTION: <0.5W

PROTECTION

OVERLOAD: 108 ~ 130% rated output power Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT: Shut down o/p voltage, re-power on to recover
OVER VOLTAGE: 28 ~ 34V Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: Tcase=-40 ~ +85℃ (Please refer to " OUTPUT LOAD vs TEMPERATURE" section)
MAX. CASE TEMP.: Tcase=+85℃
WORKING HUMIDITY: 20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^Note.5: UL8750( type "HL" ), UL879( for 12V,24V only), CSA C22.2 No. 250.13-12; ENEC BS EN/EN61347-1, BS EN/EN61347-2-13 independent,BS EN/EN62384, IP67,BIS IS15885( for 12V,24V only), EAC TP TC 004, GB/T19510.1,GB/T19510.213 approved; Design refer to BS EN/EN60335-1
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION^Note.6: Compliance to BS EN/EN55015, BS EN/EN61000-3-2 Class C (@load≧60%) ; 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: 2625.4K hrs min. Telcordia SR-332 (Bellcore) ; 226.4K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 150*53*35mm (L*W*H)
PACKING: 0.49Kg;30pcs/15.7Kg/1.0CUFT

Test conditions and notes8

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. 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)
5. This series meets the typical life expectancy of >50,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 75℃ or less.
6. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com
7. 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).
8. For any application note and IP water proof function installation caution, please refer our user manual before using. https://www.meanwell.com/Upload/PDF/LED_EN.pdf

Technical drawings

PWM-40-24 DIMMING OPERATION — DIMMING OPERATION

PWM-40-24 ◎ Applying additive resistance — ◎ Applying additive resistance

PWM-40-24 OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

PWM-40-24 STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

PWM-40-24 TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

PWM-40-24 Mechanical Specification — Mechanical Specification

PWM-40-24 Recommend Mounting Direction — Recommend Mounting Direction

PWM-40-24 ◎Connection for Blank-type — ◎Connection for Blank-type

Typical applications

LED strip lighting
Indoor LED lighting
LED decorative lighting
LED architecture lighting
Type "HL" for use in Class I, Division 2 hazardous (Classified) location.

Downloads

Certificates5

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

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

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

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

ErP Certificate (PWM-40)(EN) PDF Download

Test reports1

Test Report(PWM-40-24)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can the PWM-40-24 power 24V LED strips in an outdoor installation?

Yes. The PWM-40-24 carries an IP67 rating, making it suitable for outdoor and wet-location use where moisture exposure is expected. Its -40°C to +85°C operating range supports installation in most outdoor environments year-round.

How many meters of 24V LED strip can the PWM-40-24 support?

The PWM-40-24 supplies a maximum of 40W at 24V. Divide 40W by your strip's power consumption per meter — for example, a 14W/m strip allows approximately 2.8 meters. Always verify your strip's actual rated watts per meter before sizing the run.

Is the PWM-40-24 a good fit for dimmable 24V under-cabinet or display lighting?

Yes. The built-in 3-in-1 dimming supports 0–10V analog, PWM signal, and resistance control, allowing smooth brightness adjustment for 24V under-cabinet lighting and display case applications. The 40W output is adequate for short or medium strip runs in these settings.

Can I install the PWM-40-24 in a non-metallic or sealed junction box?

Yes. The Class II design without a functional earth ground (FG) connection and the fully isolated plastic case allow installation in non-metallic enclosures and sealed junction boxes without a grounding conductor.

Is the PWM-40-24 suitable for powering 24V LED architectural accent lighting on a building facade?

Yes. The IP67 waterproof rating and wide operating temperature range of -40°C to +85°C make the PWM-40-24 appropriate for facade-mounted 24V LED accent lighting exposed to rain and temperature extremes. Its 40W capacity can drive short runs of high-efficiency accent strip.

What dimming protocols does the PWM-40-24 support compared to the DA and KN variants?

The PWM-40-24 uses built-in 3-in-1 dimming (0–10V, PWM signal, and resistance). The DA suffix models add DALI protocol support, the DA2 suffix adds DALI-2 support, and the KN suffix adds KNX protocol support. All variants in the 40W range share the same 40W output.

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Model	Power	Voltage	Current	IP Rating
Mean Well PWM-40-48 Power Supply 40W 48V - Dimmable 840mA	40.32W	48V	0.84A	IP67	View
Mean Well PWM-40-36 Power Supply 40W 36V - Dimmable 1.12A	40.32W	36V	1.12A	IP67	View
Mean Well PWM-40-12 Power Supply 40W 12V - Dimmable 3.34A	40.08W	12V	3.34A	IP67	View

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