Mean Well HLG-40H-48AB Power Supply 40W 48V - Adjustable and Dimmable

Description

Features

Universal AC input (up to 305VAC) / Full range

High efficiency up to 90.5%

Built-in active PFC function, PF> 0.9 for 60% of load or higher

Protections: Short circuit / Over current / Over voltage / Over temperature

IP67 / IP65 design for indoor or outdoor installations

Class 2 power unit

Output current adjustable through output cable or internal potentiometer

Cooling by free air convection

Suitable for dry, damp and wet location

Suitable for LED lighting and street lighting applications

Meet 4kV surge immunity level (IEC61000-4-5)

Multiple models for choice: A-Type: IP65 rated. Output voltage and constant current level can be adjusted through internal potentiometer B-Type: IP67 rated and built-in 3 in 1 dimming function (1~10VDC, PWM signal, or resistance) Blank-Type: IP67 rated. Cable for I/O connection D-Type(option): IP67 rated. Timer dimming function, contact MEAN WELL for details.

7 years warranty

General Specification

AC input voltage range	90~305VAC ; 127~431VDC
AC inrush current (max.)	Cold start, 50A at 230VAC
DC adjustment range	±10% rated output voltage (A-Type only)
Current adjustment range	60%~100% rated output current adjustable by internal potentiometer (A-Type only)
Over current protection	95%~108% constant current limiting, auto-recovery
Over voltage protection	109%~145% rated output voltage, shut off, re-power on to recover
Setup, rise, hold up time	1000ms, 80ms, 16ms at full load and 230VAC
Withstand voltage	I/P-O/P: 3.75kVAC, I/P-FG: 2kVAC, O/P-FG:0.5kVAC
Working temperature	-40~+70ºC (refer to output derating curve)
Safety standards	UL8750, TUV EN61347-1, EN61347-2-13, PSE J61347-1, J61347-2-13 approved; Design refer to UL60950-1, EN60950-1, EN60335-1
EMC standards	EN55015, EN61000-3-2 class C, EN61000-3-3, EN61000-4-2,3,4,5,6,8,11, EN61547
Connection Input	UL rated, SJTW 18AWGx3C (30cm)
Connection Output	A/D/Blank-Type: SVT 18AWGx2C (30cm); B-Type: SVT 18AWGx2C (30cm)+UL2517 18AWGx2C (30cm)
Dimension (LxWxH) (mm)	171x 61.5x 36.8

Specifications

Brand

Mean Well
Series

HLG Series
Power Rating

40 Watt
Output Voltage

48 Volt
Rated Current

0.84 Ampere
Input Voltage

90V~305V
No of Output

1
Dimming Control

10V PWM,1-10V,Built-in Potentiometer,Resistance
Standards Met

CB,CCC,CE,EAC,PSE,RCM,TUV,UL
Operation Mode

Constant Current,Constant Voltage
Operating Temperature

-40°C~80°C
Warranty

7 Year
Length

6.73 in
Width

2.42 in
Height

1.45 in
Weight

1.61 lb

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Frequently Asked Questions

Can I use the HLG-40H-48AB to power 48V LED strip lighting in covered outdoor areas?

Yes. The HLG-40H-48AB outputs 48V at up to 0.84A (40W) and carries an IP65 water-resistant rating, making it suitable for covered patios, canopies, and soffits where splashing water or dust may be present. For fully rain-exposed locations, consider the IP67-rated HLG-40H-48B instead.

Is the HLG-40H-48AB a good driver for small 48V LED signage projects?

Yes. With 40W at 48V, it can power compact 48V LED sign modules or channel letters with low total wattage. The built-in dimming input lets you adjust brightness for day/night cycles, and the adjustable output helps fine-tune voltage to match specific module requirements.

Can I dim the HLG-40H-48AB using a 1-10V or PWM signal?

Yes. The AB suffix means it supports both output voltage/current adjustment via built-in potentiometer and external dimming via 1-10V, PWM, or resistance input. This makes it well suited for applications where you need both precise output trimming and remote brightness control.

How many meters of 48V LED strip can the HLG-40H-48AB drive?

Divide 40W by your strip's power per meter. For example, a 48V strip rated at 8W/m would allow up to 5 meters (40W / 8W per meter = 5m). Always check your strip's rated power per meter and keep the total load at or below 40W.

What is the difference between the HLG-40H-48, 48A, 48AB, and 48B models?

All four share the same 40W / 48V / 0.84A core specs. The base HLG-40H-48 has no adjustment or dimming and is IP67 waterproof. The -48A adds output voltage/current adjustment via potentiometer (IP65). The -48AB adds both adjustment and 1-10V/PWM dimming input (IP65). The -48B adds dimming input only and retains IP67.

Is the HLG-40H-48AB suitable for installation in a dusty warehouse or workshop?

Yes. Its IP65 rating provides complete protection against dust ingress and low-pressure water jets. The aluminium casing and -40°C to +80°C operating temperature range also make it durable in environments with temperature fluctuations and airborne particulates.

Model	Power	Voltage	Current	IP Rating	Price
Mean Well HLG-40H-12B Power Supply 40W 12V - Dimmable	40W	12V	3.33A	IP67	$36.29	View
Mean Well HLG-40H-24B Power Supply 40W 24V - Dimmable	40W	24V	1.67A	IP67	$33.90	View
Mean Well HLG-40H-24A Power Supply 40W 24V - Adjustable	40W	24V	1.67A	IP65	$35.28	View
Mean Well HLG-40H-12 Power Supply 40W 12V	40W	12V	3.33A	IP67	$34.18	View
Mean Well HLG-40H-15B Power Supply 40W 15V - Dimmable	40.5W	15V	2.67A	IP67	$35.33	View