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

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

SKU PWM-120-48

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Overview

PWM-120-48 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
Emergency lighting application is available according to IEC61347-2-13
Built-in active PFC function and class II design
No load power consumption<0.5W/ standby power consumption<0.5W(DA2-type)
Fully encapsulated with IP67 level
Function options: 3 in 1 dimming (dim-to-off); DALI-2
Minimum dimming level 0.2% for DALI-2 type
Typical lifetime>50000 hours and 5 years warranty

Specifications

PWM-120-48Specifications from the official datasheet (2026-07-08 edition)

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 2.5A
RATED POWER: 120W
DIMMING RANGE: 0 ~ 100%
PWM FREQUENCY (Typ.): 1.47kHz for Blank-Type, 2.5kHz for DA2-Type
SETUP, RISE TIME^{Note.2 Note.9}: 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>0.93/277VAC @ 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 DA2-type

PROTECTION

OVERLOAD: 108 ~ 130% rated output power Hiccup mode, recovers automatically after fault condition is removed
SHORT CIRCUIT: 12V/24V hiccup mode and 36V/48V shut down mode(except for DA2-type) Hiccup mode,recovers automatically after fault condition is removed (only for DA2-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” ), CSA C22.2 No. 250.13-12; ENEC BS EN/EN61347-1, BS EN/EN61347-2-13, BS EN/EN62384 independent, IP67,BIS IS 15885(Part2/Sec13)(for 12,24 Blank and DA2 Type), EAC TP TC 004, GB/T19510.1,GB/T19510.213 approved; Design refer to BS EN/EN60335-1; According to BS EN/EN61347-2-13 appendix J suitable for emergency installations(EL)(AC Input: 100-240Vac)(for DA2-Type only)
DALI STANDARDS: IEC62386-101, 102, 207,251 for DA2-Type only, Device type 6(DT6)
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC; I/P-DA:1.5KVAC; O/P-DA:1.5KVAC
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: 2243.7K 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

Certifications & ratings

AC Input: 100-240Vac (for DA2-Type only)

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. 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
9. Based on IEC 62386-101/102 DALI power on timing and interruption regulations, the set up time needs to test with a DALI controller which can support for DALI power on function, otherwise the set up time will be higher than 0.5 second for DA type.

Technical drawings

PWM-120-48 DIMMING OPERATION — DIMMING OPERATION

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

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

PWM-120-48 STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

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

PWM-120-48 Block Diagram — Block Diagram

PWM-120-48 Mechanical Specification — Mechanical Specification

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

Typical applications

LED strip lighting
Indoor LED lighting
LED decorative lighting
LED architecture lighting
Industrial lighting
Type "HL" for use in class I, division 2 hazardous (classified) location.

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-120-48)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the PWM-120-48 to power 48V LED strips outdoors?

Yes. The IP67 waterproof rating allows the PWM-120-48 to be installed in outdoor or exposed locations, and its operating temperature range of -40°C to +90°C accommodates most climate conditions. The Class II isolated design also reduces safety concerns in wet environments.

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

The PWM-120-48 delivers up to 120W at 48V. Divide 120W by your strip's watt-per-meter rating to find the maximum length — for example, a 20 W/m strip allows up to 6 m. Always verify the strip's rated power consumption per meter before sizing.

Is the PWM-120-48 suitable for 48V LED signage with dimming capability?

Yes. The built-in 3-in-1 dimming supports PWM signal, 0–10V, and resistance control, making the PWM-120-48 compatible with most external dimmer controllers used in illuminated signage. Its 120W capacity supports medium-format 48V sign cabinets.

Can the PWM-120-48 be used for long-run linear architectural lighting at 48V?

Yes. 48V systems allow longer cable runs with lower voltage drop compared to 12V or 24V, and the PWM-120-48 provides up to 120W to take advantage of that. It is a good match for linear architectural lighting fixtures or LED channels using 48V strip.

Is the PWM-120-48 appropriate for outdoor landscape uplighting at 48V?

Yes. The IP67 rating and -40°C cold-start performance make the PWM-120-48 reliable in ground-level or buried-enclosure landscape installations. At 2.5A output current it can supply multiple 48V uplights up to a combined 120W load.

How does the PWM-120-48 compare to other PWM-series drivers at 48V?

The PWM-120-48 is the 120W, 48V model in the series. Other 48V models include the PWM-40-48 (40W, 0.84A), PWM-60-48 (60W, 1.25A), and PWM-90-48 (90W, 1.88A). DALI-2 control is available via the DA2-type variant (e.g., PWM-120-48DA2).

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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-120-36DA 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
Mean Well PWM-120-12KN AC-DC Single output LED driver Constant Voltage (CV) 10A	120W	12V	10A	IP67	View

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