Mean Well HLG-320H-42B Power Supply 320W 42V - Dimmable | HLG Series | Constant Voltage + Constant Current LED Driver

Name: Mean Well HLG-320H-42B Power Supply 320W 42V- Dimmable 7.65A
Brand: Mean Well
SKU: HLG-320H-42B
Price: 103.38 USD
Availability: InStock

Overview

HLG-320H-42B is the 42V output model of this series: rated current 7.65A, rated power 321.3W, typical efficiency 95%.

HLG-320H series is a 320W AC/DC LED driver featuring the dual mode constant voltage and constant current output. HLG-320H operates from 90～305VAC and offers models with different rated voltage ranging between 12V and 54V. Thanks to the high efficiency up to 94%, with the fanless design, the entire series is able to operate for -40℃ ~ +90℃ 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-320H 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
IP67 / IP65 rating for indoor or outdoor installations
Function options: output adjustable via potentiometer; 3 in 1 dimming
Typical lifettime > 62000 hours
7 years warranty

Specifications

HLG-320H-42BSpecifications from the official datasheet (2026-02-04 edition)

OUTPUT

DC VOLTAGE: 42V
CONSTANT CURRENT REGION^Note.4: 21 ~ 42V
RATED CURRENT: 7.65A
RATED POWER: 321.3W
RIPPLE & NOISE (max.)^Note.2: 250mVp-p
VOLTAGE ADJ. RANGE: 38 ~ 45V
CURRENT ADJ. RANGE: 3.8 ~ 7.65A
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME^Note.6: 2500ms,80ms/115VAC 600ms,80ms/230VAC
HOLD UP TIME (Typ.): 15ms / 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≧0.94/277VAC @ full load (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION: THD< 20% (@ load≧50% / 115VAC,230VAC; @ load≧75% / 277VAC) (Please refer to " TOTAL HARMONIC DISTORTION (THD) " section)
EFFICIENCY (Typ.) (230Vac): 95%
EFFICIENCY (Typ.) (277Vac): 95%
AC CURRENT (Typ.): 3.5A / 115VAC 1.65A / 230VAC 1.45A / 277VAC
INRUSH CURRENT(Typ.): COLD START 70A(twidth=1010μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 1 unit (circuit breaker of type B) / 2 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.75mA / 277VAC

PROTECTION

OVER CURRENT^Note.4: 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: 46.5 ~ 53V
OVER TEMPERATURE: Shut down and latch off 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 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: 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; IP65 or IP67 (except for HLG-320H C-type); J61347-1, J61347-2-13 (except for C-type), EAC TP TC 004;KC61347-1,KC61347-2-13(except for AB,C-type), BIS IS 15885(Part2/Sec13) (NOTE 13) approved
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: Compliance to BS EN/EN55015, BS EN/EN55032 (CISPR32) Class B, BS EN/EN61000-3-2 Class C (@ load≧50%) ; 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, BS EN/EN55024, light industry level (surge immunity Line-Earth 4KV, Line-Line 2KV), EAC TP TC 020

OTHERS

MTBF: 1702.2K hrs min. Telcordia SR-332 (Bellcore) ; 157.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 252*90*43.8mm (L*W*H)
PACKING: 1.88Kg; 8pcs/16Kg/0.92CUFT

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. BIS certification is for HLG-320H-A only, but products sourced from Taiwan do not have the BIS logo, please contact your MEAN WELL sales for more information.
14. For A/AB type need to consider build in using to comply with Type HL application.

Technical drawings

HLG-320H-42B BLOCK DIAGRAM — BLOCK DIAGRAM

HLG-320H-42B DIMMING OPERATION — DIMMING OPERATION

HLG-320H-42B Illustration (page 5) — Illustration (page 5)

HLG-320H-42B OUTPUT LOAD vs TEMPERATURE(Note.10) — OUTPUT LOAD vs TEMPERATURE(Note.10)

HLG-320H-42B STATIC CHARACTERISTICS — STATIC CHARACTERISTICS

HLG-320H-42B TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

HLG-320H-42B MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

HLG-320H-42B WATERPROOF CONNECTION — WATERPROOF CONNECTION

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

CB Certificate (HLG-320H)(EN) PDF Download

TUV Certificate (HLG-320H)(EN) PDF Download

EMC Certificate(HLG-320H)(EN) PDF Download

UL Certificate(HLG-320H)(EN) PDF Download

PSE Certificate(HLG-320H)(EN) PDF Download

Test reports1

Test Report (HLG-320H-42)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the HLG-320H-42B to power outdoor 42V LED strip lighting exposed to rain?

Yes. The HLG-320H-42B outputs 42V at up to 7.65A (320W), and the series' IP65/IP67-rated metal housing is designed for both indoor and outdoor applications. Its -40°C to +90°C case-temperature (Tcase) range handles harsh outdoor conditions; check the B-type's IP rating before exposing it directly to rain.

Is the HLG-320H-42B suitable for dimming 42V LED facade lighting?

Yes. The B suffix means this model has a 3-in-1 dimming input (1-10VDC, 10V PWM or resistance) without built-in potentiometers. You can connect it to an external dimming controller for facade lighting scenes, and the series' metal housing is IP65/IP67-rated for outdoor mounting.

Can the HLG-320H-42B drive 42V LED modules for outdoor channel-letter signs?

Yes. With 320W of output at 42V, it can handle large channel-letter arrays or cabinet signs. The IP65/IP67 rating suits outdoor sign installations, and its wide 90-305VAC input accommodates varying commercial mains voltages worldwide.

Can I install the HLG-320H-42B in a below-grade light well or near a fountain?

The HLG-320H series is rated IP65 or IP67 depending on type and suits indoor and outdoor applications, but the datasheet does not state a submersion depth. For light wells, fountain perimeters, or vaults where flooding may occur, check the B-type's rating and the IP installation cautions in MEAN WELL's user manual first.

How many meters of 42V LED strip can the HLG-320H-42B support?

That depends on the strip's rated power per meter. The HLG-320H-42B supplies up to 320W at 42V. For instance, if your strip draws 20W/m you could run up to 16 meters (320W / 20W per meter = 16m). Always check your strip's rated power per meter and keep total load at or below 320W.

What are the differences between the HLG-320H-42, 42A, 42AB, and 42B variants?

All four share the same 320W / 42V / 7.65A core specs. The base HLG-320H-42 has no output adjustment or dimming. The -42A adds built-in potentiometers for output voltage and current adjustment. The -42AB adds current adjustment plus 3-in-1 dimming (1-10VDC, 10V PWM or resistance). The -42B provides dimming input only. The series is rated IP65 or IP67 depending on type.

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Mean Well HLG-320H-42B Power Supply 320W 42V- Dimmable 7.65A

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Overview

Features

Specifications

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INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Technical drawings

Typical applications

Downloads

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Test reports1

Catalogues1

FAQ

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Mean Well HLG-320H-42B Power Supply 320W 42V- Dimmable 7.65A

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