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Mean Well PWM-120-12KN AC-DC Single output LED driver Constant Voltage (CV) 10A

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

SKU PWM-120-12KN

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Overview

PWM-120-12KN is the 12V output model of this series: rated current 10A, rated power 120W, typical efficiency 88.5%.

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-120-12KNSpecifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 10A
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.): 88.5%
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: 15 ~ 17V 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-120-12KN ※ Dimming principle for PWM style output — ※ Dimming principle for PWM style output

PWM-120-12KN OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

PWM-120-12KN STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

PWM-120-12KN TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

PWM-120-12KN Block Diagram — Block Diagram

PWM-120-12KN Mechanical Specification — Mechanical Specification

PWM-120-12KN Mechanical view of by request — Mechanical view of by request

PWM-120-12KN 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-120-12)(EN) PDF Download

FAQ

Can I use the PWM-120-12KN to control 12V LED lighting directly from a KNX building automation system?

Yes. The PWM-120-12KN has a built-in KNX interface, allowing direct integration into KNX building automation networks without requiring a separate KNX-DALI gateway. It outputs 12V at 10A (120W) with a constant voltage PWM-style output compatible with 12V LED strips.

Is the PWM-120-12KN suitable for outdoor or covered wet-area LED lighting installations?

Yes. The IP67 rating makes the PWM-120-12KN suitable for outdoor enclosures and covered locations exposed to rain or moisture. Its -40°C to +90°C operating temperature range also covers demanding outdoor climates.

How many meters of 12V LED strip can the PWM-120-12KN drive?

The PWM-120-12KN supplies up to 120W at 12V. For a 10W/m LED strip that is approximately 12 meters (120 ÷ 10); for a 14.4W/m strip, approximately 8.3 meters (120 ÷ 14.4). Confirm your strip's rated power per meter and apply a 20% derating buffer.

Does the PWM-120-12KN require an external gateway to work on a KNX network?

No. The KNX interface is built into the driver, so no external KNX-DALI gateway is needed. This simplifies panel wiring and reduces the number of components in KNX lighting control installations.

Can the PWM-120-12KN be used for 12V LED strip lighting in a hotel corridor managed by a KNX system?

Yes. The PWM-120-12KN is designed for this type of application, providing 120W of 12V constant voltage output with direct KNX control. Smooth PWM-style dimming is compatible with 12V LED strip lighting commonly used in hospitality corridor and accent lighting.

How does the PWM-120-12KN's standby power compare to the standard PWM-120-12?

The PWM-120-12KN specifies a standby power consumption of less than 0.5W, which is beneficial in large building installations where many drivers may be in standby. The standard PWM-120-12 does not publish this standby figure; it uses a 3-in-1 dimming interface rather than KNX.

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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-120-24KN AC-DC Single output LED driver Constant Voltage (CV) 5A	120W	24V	5A	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

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