Mean Well HLG-40H-20 Power Supply 40W 20V 2A

Name: Mean Well HLG-40H-20 Power Supply 40W 20V 2A
Brand: Mean Well
SKU: HLG-40H-20
Price: 34.36 USD
Availability: InStock
Rating: 5.0 (4 reviews)

Overview

HLG-40H-20 is the 20V output model of this series: rated current 2A, rated power 40W, typical efficiency 88%. Type Blank: Io and Vo fixed (IP67).

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 ingress protection level allows this series to fit both indoor and outdoor applications.

Features

Constant Voltage + Constant Current mode output
Metal housing with class I design
Built-in active PFC function
Class 2 power unit
IP67 rating for indoor or outdoor installations
Typical lifetime > 62000 hours
7 years warranty

Specifications

HLG-40H-20Specifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 20V
CONSTANT CURRENT REGION^Note.4: 12 ~ 20V
RATED CURRENT: 2A
RATED POWER: 40W
RIPPLE & NOISE (max.)^Note.2: 150mVp-p
VOLTAGE ADJ. RANGE: 17 ~ 22V
CURRENT ADJ. RANGE: 1.2 ~ 2A
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
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.): 88%
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: 23 ~ 30V
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, 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

MODEL ENCODING

Blank (this model): Io and Vo fixed; IP67
A: Io and Vo adjustable through built-in potentiometer; IP65
B: 3 in 1 dimming function (1~10VDC, 10V PWM signal and resistance); IP67
AB: Io and Vo adjustable through built-in potentiometer & 3 in 1 dimming function (1~10Vdc, 10V PWM signal and resistance); IP65
D: Timer dimming function, contact MEAN WELL for details(safety pending); IP67

Test conditions and notes13

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
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-20 BLOCK DIAGRAM — BLOCK DIAGRAM

HLG-40H-20 Illustration (page 5) — Illustration (page 5)

HLG-40H-20 OUTPUT LOAD vs TEMPERATURE(Note.10) — OUTPUT LOAD vs TEMPERATURE(Note.10)

HLG-40H-20 STATIC CHARACTERISTICS — STATIC CHARACTERISTICS

HLG-40H-20 TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

HLG-40H-20 MECHANICAL SPECIFICATION ※Blank/D-Type — MECHANICAL SPECIFICATION ※Blank/D-Type

HLG-40H-20 ‧tc : Max. Case Temperature — ‧tc : Max. Case Temperature

HLG-40H-20 WATERPROOF CONNECTION — WATERPROOF CONNECTION

HLG-40H-20 WATERPROOF CONNECTION (2) — WATERPROOF CONNECTION (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

Datasheet1

HLG-40H-20 datasheetHLG-40H-SPEC.PDF · 2026-02-04 edition PDF Download

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-20)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the HLG-40H-20 to power 20V LED strip lighting outdoors?

Yes. The HLG-40H-20 outputs 20V at up to 2A (40W) and carries an IP67 waterproof rating, making it suitable for outdoor 20V LED strip installations exposed to rain or wet conditions. The metal casing and -40°C to +80°C case temperature (Tcase) working range handle extreme weather well.

Is the HLG-40H-20 suitable for powering a small 20V LED channel letter sign?

It works for small channel letter signs where the total LED load stays under 40W. The HLG-40H-20 delivers a fixed 20V at up to 2A (constant-current region 12-20V), and its IP67 waterproof rating allows mounting inside outdoor sign cabinets without moisture concerns.

Can I run 20V LED panel lights from the HLG-40H-20?

Yes, as long as the panel load does not exceed 40W. The HLG-40H-20 provides 20V at up to 2A in constant-current mode with a 12-20V operating range. Its wide 90-305VAC input supports installation on most mains power worldwide, making it versatile for both commercial and residential panel setups.

How many meters of 20V LED strip can the HLG-40H-20 support?

That depends on the strip's rated power per meter. The HLG-40H-20 provides 40W at 20V. For example, if your strip draws 10W per meter, you could run up to 4 meters (40W / 10W per meter = 4m). Always check your strip's rated power per meter and keep total load at or below 40W.

Is the HLG-40H-20 waterproof enough for an underground or in-ground installation?

The HLG-40H-20 is rated IP67, which means it can handle temporary immersion in water up to 1 meter deep for 30 minutes and is fully dust-tight. It is not rated for continuous submersion, so in an in-ground or below-grade installation keep it out of standing water and follow MEAN WELL's waterproof installation guidance in the user manual.

What are the differences between the HLG-40H-20, 20A, 20AB, and 20B variants?

All four share the same 40W, 20V, 2A core specs. The base HLG-40H-20 has fixed output and an IP67 waterproof rating. The -20A adds adjustable output via potentiometer with an IP65 water-resistant rating. The -20AB adds both adjustable output and dimming at IP65. The -20B offers dimming without adjustable output and retains the IP67 waterproof rating.

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Model	Power	Voltage	Current	IP Rating	Price
Mean Well HLG-40H-12B Power Supply 40W 12V - Dimmable 3.33A	39.96W	12V	3.33A	IP67	$32.24	View
Mean Well HLG-40H-24B Power Supply 40W 24V - Dimmable 1.67A	40.08W	24V	1.67A	IP67	$33.90	View
Mean Well HLG-40H-42B Power Supply 40W 42V - Dimmable 960mA	40.32W	42V	0.96A	IP67	$35.33	View
Mean Well HLG-40H-24A Power Supply 40W 24V - Adjustable 1.67A	40.08W	24V	1.67A	IP65	$37.32	View
Mean Well HLG-40H-15B Power Supply 40W 15V - Dimmable 2.67A	40.05W	15V	2.67A	IP67	$35.33	View
Mean Well HLG-40H-12 Power Supply 40W 12V 3.33A	39.96W	12V	3.33A	IP67	$37.32	View

Customer reviews

5.0 Reviews verified for authenticity

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Reviewed by 4 customers across the HLG series

By Penny C.|2026-10-03✓ Verified Buyer
Model: HLG-480H-24AQuantity: 2
It is a beast!
By T-Rids |2026-09-14✓ Verified Buyer
Model: HLG-480H-24BQuantity: 1
Very good product
By Maxim|2026-08-25✓ Verified Buyer
Model: HLG-320H-24B ×1, HLG-320H-24B ×1Quantity: 1
Excellent product!
By J. Vega|2026-07-20✓ Verified Buyer
Model: HLG-185H-30Quantity: 1
Exactly what I needed to revive my dead Maytronics Dolphin power supply!

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