Mean Well HLG-40H-48AB Power Supply | Adjustable 40W 48V LED Driver

Name: Mean Well HLG-40H-48AB Power Supply 40W 48V - Adjustable and Dimmable 840mA
Brand: Mean Well
SKU: HLG-40H-48AB
Price: 40.34 USD
Availability: InStock

Overview

HLG-40H-48AB is the 48V output model of this series: rated current 0.84A, rated power 40.32W, typical efficiency 89.5%.

HLG-40H series is a 40W AC/DC LED driver featuring the dual mode constant voltage and constant current output. HLG-40H operates from 90～305VAC and offers models with different rated voltage ranging between 12V and 54V. Thanks to the high efficiency up to 89.5%, with the fanless design, the entire series is able to operate for -40 ~ +80 case temperature under free air convection. The design of metal housing and IP67/IP65 ingress protection level allows this series to fit both indoor and outdoor applications. HLG-40H is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for LED lighting system.

Features

Constant Voltage + Constant Current mode output
Metal housing with class I design
Built-in active PFC function
Class 2 power unit
IP67 / IP65 rating for indoor or outdoor installations
Function options: output adjustable via potentiometer; 3 in 1 dimming; Timer dimming
Typical lifetime > 62000 hours
7 years warranty

Specifications

HLG-40H-48ABSpecifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 48V
CONSTANT CURRENT REGION^Note.4: 28.8 ~ 48V
RATED CURRENT: 0.84A
RATED POWER: 40.32W
RIPPLE & NOISE (max.)^Note.2: 300mVp-p
VOLTAGE ADJ. RANGE: Adjustable for A/AB-Type only (via built-in potentiometer)
VOLTAGE ADJ. RANGE: 44 ~ 53V
CURRENT ADJ. RANGE: Adjustable for A/AB-Type only (via built-in potentiometer)
CURRENT ADJ. RANGE: 0.5 ~ 0.84A
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME^Note.6: 500ms,80ms/115VAC 500ms,80ms/230VAC
HOLD UP TIME (Typ.): 16ms / 115VAC, 230VAC

INPUT

VOLTAGE RANGE^Note.5: 90 ~ 305VAC 127 ~ 431VDC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF≧0.98/115VAC, PF≧0.95/230VAC, PF≧0.92/277VAC @ 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 (THD)" section)
EFFICIENCY (Typ.): 89.5%
AC CURRENT (Typ.): 0.43A / 115VAC 0.24A / 230VAC 0.23A / 277VAC
INRUSH CURRENT(Typ.): COLD START 50A(twidth=210μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 12 units (circuit breaker of type B) / 20 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.75mA / 277VAC

PROTECTION

OVER CURRENT: 95 ~ 108% Constant current limiting, recovers automatically after fault condition is removed
SHORT CIRCUIT: Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 54 ~ 65V
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: Tcase= -40 ~ +80℃ (Please refer to "OUTPUT LOAD vs TEMPERATURE" section)
MAX. CASE TEMP.: Tcase= +80℃
WORKING HUMIDITY: 20 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 60℃)
VIBRATION: 10 ~ 500Hz, 5G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^Note.8: UL8750(type”HL”), CSA C22.2 No. 250.0-08 , BS EN/EN/AS/NZS 61347-1,BS EN/EN/AS/NZS 61347-2-13 independent , GB/T19510.1,GB/T19510.213,EAC TP TC 004,KC61347-1,KC61347-2-13 (except for AB-type), IP65 or IP67 approved ; J61347-1 , J61347-2-13 ; design refer to BS EN/EN60335-1(by request)
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC I/P-FG:2KVAC O/P-FG:1.5KVAC
ISOLATION RESISTANCE: I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION^Note.8: Compliance to BS EN/EN55015, BS EN/EN61000-3-2 Class C (@ load≧60%) ; BS EN/EN61000-3-3,GB/T 17743 , GB17625.1, KS C 9815, KS C 9547, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11; BS EN/EN61547, BS EN/EN55024, light industry level (surge immunity Line-Earth 4KV, Line-Line 2KV), KS C 9815, KS C 9547, EAC TP TC 020

OTHERS

MTBF: 3395.8K hrs min. Telcordia SR-332 (Bellcore) ; 345.8K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 171*61.5*36.8mm (L*W*H)
PACKING: 0.73Kg; 20pcs/15.6Kg/0.9CUFT

Certifications & ratings

Type: HL

Test conditions and notes14

1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Please refer to "DRIVING METHODS OF LED MODULE".
5. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
6. 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.
7. 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)
8. To fulfill requirements of the latest ErP regulation for lighting fixtures, this LED driver can only be used behind a switch without permanently connected to the mains.
9. This series meets the typical life expectancy of >62,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 75℃ or less.
10. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com.
11. 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).
12. 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
13. For A/AB type need to consider build in using to comply with Type HL application.
14. Products sourced from the Americas regions may only have the UL, CE and UKCA logos. Please contact your MEAN WELL sales for more information.

Technical drawings

HLG-40H-48AB BLOCK DIAGRAM — BLOCK DIAGRAM

HLG-40H-48AB DIMMING OPERATION — DIMMING OPERATION

HLG-40H-48AB Illustration (page 5) — Illustration (page 5)

HLG-40H-48AB OUTPUT LOAD vs TEMPERATURE(Note.10) — OUTPUT LOAD vs TEMPERATURE(Note.10)

HLG-40H-48AB STATIC CHARACTERISTICS — STATIC CHARACTERISTICS

HLG-40H-48AB TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

HLG-40H-48AB MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

HLG-40H-48AB ‧tc : Max. Case Temperature — ‧tc : Max. Case Temperature

HLG-40H-48AB H L G - 4 0 H series — H L G - 4 0 H series

HLG-40H-48AB H L G - 4 0 H series (2) — H L G - 4 0 H series (2)

Typical applications

LED street lighting
LED high-bay lighting
Parking space lighting
LED fishing lamp
LED greenhouse lighting
Type “HL” for use in ClassⅠ, Division 2 hazardous (Classified) location.

Downloads

Certificates5

TUV Certificate (HLG-40H)(EN) PDF Download

UL Certificate(HLG-40H)(EN) PDF Download

CB Certificate(HLG-40H)(EN) PDF Download

EMC Certificate(HLG-40H)(EN) PDF Download

PSE Certificate(HLG-40H)(EN) PDF Download

Test reports1

Test Report(HLG-40H-48)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

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 metal casing and -40°C to +80°C case temperature (Tcase) working range also make it durable in environments with temperature fluctuations and airborne particulates.

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Mean Well HLG-40H-48AB Power Supply 40W 48V - Adjustable and Dimmable 840mA

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Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Certifications & ratings

Technical drawings

Typical applications

Downloads

Certificates5

Test reports1

Catalogues1

FAQ

Payment & Security

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Mean Well HLG-40H-48AB Power Supply 40W 48V - Adjustable and Dimmable 840mA

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