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Mean Well PWM-120-48DA Power Supply 120W 48V - DALI 2.5A

PWM style outputfully isolated plastic caseIP67Class II design without FGDALI

SKU PWM-120-48DA

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Overview

PWM-120-48DA is the 48V output model of this series: rated current 2.5A, rated power 120W, typical efficiency 90.5%.

PWM-120 series is a 120W 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-120 operates from 90～305VAC and offers models with different rated voltage ranging between 12V and 48V. Thanks to the high efficiency up to 90.5%, with the fanless design, the entire series is able to operate for -40℃ ~ +90℃ 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-120 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
No load power consumption<0.5w / standby power consumption<0.5W(DA-type)
Fully encapsulated with IP67 level
Function options: 3 in 1 dimming (dim-to-off); DALI
Minimum dimming level 0.2% for DA type
Typical lifetime>50000 hours and 5 years warranty

Specifications

PWM-120-48DASpecifications from the official datasheet (2019-12-26 edition)Download datasheet PDF

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 2.5A
RATED POWER: 120W
DIMMING RANGE: 0 ~ 100%
PWM FREQUENCY (Typ.): 1.47kHz
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.): 90.5%
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
NO LOAD/STANDBY POWER CONSUMPTION: No load power consumption<0.5w for blank-type;standby power consumption<0.5W for DA-type

PROTECTION

OVERLOAD: 108 ~ 120% rated output power Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT: 12V/24V hiccup mode and 36V/48V shut down mode(including DA-type)
OVER VOLTAGE: 54 ~ 60V 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: UL8750( type ”HL” )(except for 12DA type), CSA C22.2 No. 250.13-12; ENEC EN61347-1, EN61347-2-13,EN62384 independent, IP67,BIS IS15885( for PWM-120-12,24 only), EAC TP TC 004,GB19510.1,GB19510.14 approved; Design refer to EN60335-1
DALI STANDARDS: Comply with IEC62386-101, 102, 207 for DA-Type only
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 EN55015, EN61000-3-2 Class C (@load≧60%) ; EN61000-3-3,GB17743 and GB17625.1,EAC TP TC 020
EMC IMMUNITY: Compliance to EN61000-4-2,3,4,5,6,8,11; EN61547, light industry level (surge immunity Line-Line 2KV),EAC TP TC 020

OTHERS

MTBF: 860.4K hrs min. Telcordia SR-332 (Bellcore) ; 228.7K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 191*63*37.5mm (L*W*H)
PACKING: 0.97Kg; 15pcs/15.6Kg/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.
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-120-48DA DIMMING OPERATION — DIMMING OPERATION

PWM-120-48DA ◎ Applying additive resistance — ◎ Applying additive resistance

PWM-120-48DA OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

PWM-120-48DA STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

PWM-120-48DA TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

PWM-120-48DA Block Diagram — Block Diagram

PWM-120-48DA Mechanical Specification — Mechanical Specification

PWM-120-48DA Recommend Mounting Direction — Recommend Mounting Direction

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

Datasheet1

PWM-120-48DA datasheetpwm_120_spec.pdf · 2019-12-26 edition PDF Download

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-120-48)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can the PWM-120-48DA be controlled by a DALI building automation system?

Yes. The PWM-120-48DA has a DALI interface that allows it to be individually addressed and dimmed by any IEC 62386-compliant DALI controller or building management system. This makes it a standard choice for commercial 48V LED installations requiring centralised control.

Is the PWM-120-48DA waterproof enough for outdoor use?

Yes. The IP67 rating certifies protection against dust and temporary submersion up to 1 metre, making it suitable for outdoor signage cabinets, building facade lighting, and covered wet-area installations. Operating temperature range is -40°C to +90°C.

How many meters of 48V LED strip can the PWM-120-48DA power?

The driver supplies up to 120W at 48V and 2.5A. To find the maximum strip length, divide 120W by the strip's rated watt-per-meter figure — a 15 W/m strip, for example, allows up to 8 m. Confirm your strip's rated power per meter before planning the run.

Is the PWM-120-48DA suitable for DALI-controlled museum or gallery display lighting at 48V?

Yes. Museum and gallery lighting often requires precise, programmable dimming scenes, which DALI supports natively. The PWM-120-48DA's DALI interface integrates into such systems, and the PWM-style output produces smooth, artifact-free dimming on 48V LED strips.

Can I use the PWM-120-48DA in a DALI Zone controlling multiple fixtures?

Yes. DALI allows up to 64 individually addressed devices per bus, and the PWM-120-48DA is DALI-addressable. Multiple drivers can operate in the same DALI zone while responding to individual addressing or group commands from the controller.

What is the key difference between the PWM-120-48DA and PWM-120-48?

Both are 120W, 48V, 2.5A drivers with IP67 rating and identical physical dimensions. The PWM-120-48 uses built-in 3-in-1 dimming (PWM signal, 0–10V, resistance); the PWM-120-48DA replaces that with a DALI interface for addressable DALI network integration.

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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
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Mean Well PWM-120-48 Power Supply 120W 48V - Dimmable 2.5A	120W	48V	2.5A	IP67	View
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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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