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Mean Well PWM-120-24KN AC-DC Single output LED driver Constant Voltage (CV) 5A

constant voltage PWM style outputbuilt-in active PFC functionstandby power consuption<0.5Wno need KNX-DALI gateway

SKU PWM-120-24KN

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Overview

PWM-120-24KN is the 24V output model of this series: rated current 5A, rated power 120W, typical efficiency 90%.

PWM KN series is a 120W AC/DC LED driver featuring the constant voltage mode with PWM style output, which is able to maintain the colour temperature and the brightness homogeneity when driving all kinds of LED strips and constant voltage LED bulbs.The built-in KNX interface is to avoid using the complicated KNX-DALI gateway. PWM KN operates from 90~305VAC and offers two models with output voltage 12V & 24V.Thanks to the high efficiency up to 90%, with the fanless design, the entire series is able to operate for -40℃ ~ +90℃ case temperature under free air convection. The minimal dimming level low to 0.01% is suitable for low light level applications e.g. cinema. The output frequency is changeable up to 4KHz compliant IEEE1789-2015 no risk requirement and EU Ecodesign stroboscopic visibilitymeasure(SVM) requirement providing a great solution for health concern due to light flickering.

Features

Constant Voltage PWM style output with user changeable frequency up to 4KHz design compliant IEEE1789-2015 and EU Ecodesign SVM requirement
Min. dimming level 0. 01%
Plastic housing with class II design
Standby power consumption<0.5W
Integrated KNX control protocol
No need KNX-DALI gateway
Typical lifet ime>50000 hours
5 years warranty

Specifications

PWM-120-24KNSpecifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 24V
RATED CURRENT: 5A
RATED POWER: 120W
DIMMING RANGE: 0 ~ 100%
PWM FREQUENCY (Typ.): 200~4000Hz user changable via ETS
SETUP, RISE TIME^Note.2: 500ms, 80ms/ 230VAC or 115VAC
HOLD UP TIME (Typ.): 16ms/230VAC or 115VAC

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>0.96/230VAC, PF>0.94/277VAC @ 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.): 90%
AC CURRENT (Typ.): 1.3A / 115VAC 0.65A / 230VAC 0.55A / 277VAC
INRUSH CURRENT (Typ.): COLD START 60A(twidth=520μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. NO. of PSUs on 16A CIRCUIT BREAKER: 4 units (circuit breaker of type B) / 6 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.25mA / 277VAC
STANDY 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 ~ +90℃ (Please refer to “ OUTPUT LOAD vs TEMPERATURE” section)
MAX. CASE TEMP.: Tcase=+90℃
WORKING HUMIDITY: 20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 45℃,except 0 ~ 40℃ for 12V)
VIBRATION: 10 ~ 500Hz, 5G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^Note.5: ENEC BS EN/EN61347-1, BS EN/EN61347-2-13, BS EN/EN62384 independent, GB/T19510.1,GB/T19510.213, BIS IS 15885(Part2/Sec13)(for 12/24 KN), EAC TP TC 004 approved
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.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: 1915.2K hrs min. Telcordia SR-332 (Bellcore) ; 205.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 191*63*37.5mm (L*W*H)
PACKING: 0.80Kg; 15pcs/13.0Kg/0.87CUFT

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-120-24KN ※ Dimming principle for PWM style output — ※ Dimming principle for PWM style output

PWM-120-24KN OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

PWM-120-24KN STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

PWM-120-24KN TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

PWM-120-24KN Block Diagram — Block Diagram

PWM-120-24KN Mechanical Specification — Mechanical Specification

PWM-120-24KN Mechanical view of by request — Mechanical view of by request

PWM-120-24KN Recommend Mounting Direction — Recommend Mounting Direction

Typical applications

LED strip lighting
Indoor LED lighting
LED decorative lighting
LED architecture lighting

Downloads

Certificates5

UL Certificate (PWM-120)(EN) PDF Download

CB Certificate (PWM-120)(EN) PDF Download

EMC Certificate (PWM-120)(EN) PDF Download

ENEC Certificate (PWM-120)(EN) PDF Download

ErP Certificate (PWM-120)(EN) PDF Download

Test reports1

Test Report(PWM-120-24)(EN) PDF Download

FAQ

Can the PWM-120-24KN control 24V LED lighting directly from a KNX building automation system?

Yes. The PWM-120-24KN has a built-in KNX interface, enabling direct integration with KNX networks for scene-based and zone lighting control without requiring a separate KNX-DALI gateway. It outputs 24V at 5A (120W) with a PWM-style constant voltage output for 24V LED strips.

Is the PWM-120-24KN suitable for outdoor or wet-location LED strip installations?

Yes. Its IP67 rating provides protection against dust and temporary water immersion, making it appropriate for outdoor enclosures and wet indoor locations. The -40°C to +90°C operating range accommodates demanding outdoor environments.

How many meters of 24V LED strip can the PWM-120-24KN drive?

The PWM-120-24KN delivers up to 120W at 24V. For a 20W/m strip, that supports up to 6 meters (120 ÷ 20); for a 14.4W/m strip, approximately 8.3 meters (120 ÷ 14.4). Always check your strip's rated power per meter and maintain a 20% headroom margin.

Can I use the PWM-120-24KN for 24V LED strips in a KNX-controlled commercial building without additional gateways?

Yes. The integrated KNX interface eliminates the need for a separate KNX-DALI gateway, simplifying the installation. Standby power consumption is less than 0.5W, which is relevant in large commercial buildings with many drivers that may idle for extended periods.

Is the PWM-120-24KN appropriate for 24V LED signage in a retail environment controlled by KNX?

Yes. The 120W, 24V output can power 24V LED modules and strips used in illuminated retail signage. The KNX interface allows the signage lighting to be scheduled and dimmed as part of the broader KNX retail environment control system.

How does the PWM-120-24KN differ from the PWM-120-24 for a KNX lighting project?

Both deliver 120W at 24V/5A with IP67 protection. The PWM-120-24 uses built-in 3-in-1 dimming (PWM, 0-10V, resistance) and requires a separate gateway for KNX integration. The PWM-120-24KN has a native KNX interface built in, removing the need for that gateway and reducing the overall component count in a KNX installation.

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Model	Power	Voltage	Current	IP Rating
Mean Well PWM-120-24DA2 Power Supply 120W 24V DALI2 5A	120W	24V	5A	IP67	View
Mean Well PWM-120-24DA Power Supply 120W 24V - DALI 5A	120W	24V	5A	IP67	View
Mean Well PWM-120-12DA2 Power Supply 120W 12V DALI2 10A	120W	12V	10A	IP67	View
Mean Well PWM-120-48DA Power Supply 120W 48V - DALI 2.5A	120W	48V	2.5A	IP67	View
Mean Well PWM-120-48 Power Supply 120W 48V - Dimmable 2.5A	120W	48V	2.5A	IP67	View
Mean Well PWM-120-36DA Power Supply 120W 36V - DALI 3.4A	122.4W	36V	3.4A	IP67	View
Mean Well PWM-120-36 Power Supply 120W 36V - Dimmable 3.4A	122.4W	36V	3.4A	IP67	View
Mean Well PWM-120-24BLE AC-DC Single output LED driver Constant Voltage (CV)	120W	24V	5A	—	View
Mean Well PWM-120-24 Power Supply 120W 24V - Dimmable 5A	120W	24V	5A	IP67	View
Mean Well PWM-120-12KN AC-DC Single output LED driver Constant Voltage (CV) 10A	120W	12V	10A	IP67	View

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