Mean Well HLG-40H-54AB 40W 54V Power Supply - Adjustable & Dimmable

Name: Mean Well HLG-40H-54AB Power Supply 40W 54V - Adjustable and Dimmable 750mA
Brand: Mean Well
SKU: HLG-40H-54AB
Price: 40.34 USD
Availability: InStock

Overview

HLG-40H-54AB is the 54V output model of this series: rated current 0.75A, rated power 40.5W, 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-54ABSpecifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 54V
CONSTANT CURRENT REGION^Note.4: 32.4 ~ 54V
RATED CURRENT: 0.75A
RATED POWER: 40.5W
RIPPLE & NOISE (max.)^Note.2: 300mVp-p
VOLTAGE ADJ. RANGE: Adjustable for A/AB-Type only (via built-in potentiometer)
VOLTAGE ADJ. RANGE: 49 ~ 58V
CURRENT ADJ. RANGE: Adjustable for A/AB-Type only (via built-in potentiometer)
CURRENT ADJ. RANGE: 0.45 ~ 0.75A
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: 59 ~ 68V
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-54AB BLOCK DIAGRAM — BLOCK DIAGRAM

HLG-40H-54AB DIMMING OPERATION — DIMMING OPERATION

HLG-40H-54AB Illustration (page 5) — Illustration (page 5)

HLG-40H-54AB OUTPUT LOAD vs TEMPERATURE(Note.10) — OUTPUT LOAD vs TEMPERATURE(Note.10)

HLG-40H-54AB STATIC CHARACTERISTICS — STATIC CHARACTERISTICS

HLG-40H-54AB TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

HLG-40H-54AB MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

HLG-40H-54AB ‧tc : Max. Case Temperature — ‧tc : Max. Case Temperature

HLG-40H-54AB H L G - 4 0 H series — H L G - 4 0 H series

HLG-40H-54AB 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-54)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the HLG-40H-54AB with a building automation system to control 54V LED lighting?

Yes. The AB suffix means it accepts 1-10V, PWM, or resistance dimming signals, making it compatible with most building automation and lighting control systems. The built-in potentiometer also lets you set a baseline output level independently of the automation signal.

Is the HLG-40H-54AB suitable for dimmable 54V accent lighting in a hospitality setting?

Yes. At 40W and 54V with both adjustable output and dimming input, it works well for small-scale accent lighting in hotels, restaurants, or lobbies where 54V LED fixtures need precise brightness control. The adjustable output helps match the driver to specific fixture requirements.

Can the HLG-40H-54AB drive 54V LED linear lights in a museum or gallery?

Yes, provided the total fixture load stays within 40W. The combination of output adjustment and dimming input gives precise control over light levels, which is important for artifact preservation and visitor experience. The constant-current mode with a 32.4-54V range accommodates different LED forward voltages.

How many meters of 54V LED strip can the HLG-40H-54AB support?

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

Can the HLG-40H-54AB be mounted in a semi-outdoor location like a covered porch?

Yes. Its IP65 water-resistant rating protects against dust and splashing water, making it suitable for covered porches, patios, and soffits. For fully exposed outdoor locations with heavy rain or potential flooding, the IP67-rated HLG-40H-54B is a better choice.

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Mean Well HLG-40H-54AB Power Supply 40W 54V - Adjustable and Dimmable 750mA

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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-54AB Power Supply 40W 54V - Adjustable and Dimmable 750mA

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