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Mean Well HLG-185H-42AB Power Supply 185W 42V - Adjustable and Dimmable 4.4A

premium quality7 years warrantyaluminium casinghigh efficiency
SKU HLG-185H-42AB
$59.88 USD
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HLG-185H-42AB
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Overview

HLG-185H-42AB is the 42V output model of this series: rated current 4.4A, rated power 184.8W, typical efficiency 94%. Type AB: Io and Vo adjustable through built-in potentiometer & 3 in 1 dimming function (1~10Vdc, 10V PWM signal and resistance) (IP65).

HLG-185H series is a 185W AC/DC LED driver featuring the dual mode constant voltage and constant current output. HLG-185H 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 IP65 ingress protection level allows this series to fit both indoor and outdoor applications. HLG-185H 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
  • IP65 rating for indoor or outdoor installations
  • Function options: output adjustable via potentiometer; 3 in 1 dimming
  • Typical lifetime > 62000 hours
  • 7 years warranty

Specifications

HLG-185H-42ABSpecifications from the official datasheet (2026-07-24 edition)

OUTPUT

DC VOLTAGE
42V
CONSTANT CURRENT REGIONNote.4
21 ~ 42V
RATED CURRENT
4.4A
RATED POWER
184.8W
RIPPLE & NOISE (max.)Note.2
200mVp-p
VOLTAGE ADJ. RANGE
Adjustable for A/AB-Type only (via built-in potentiometer) 38 ~ 46V
CURRENT ADJ. RANGE
Adjustable for A/AB-Type only (via built-in potentiometer) 2.2 ~ 4.4A
VOLTAGE TOLERANCENote.3
±1.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±0.5%
SETUP, RISE TIMENote.6
1000ms,200ms/115VAC 500ms,200ms/230VAC
HOLD UP TIME (Typ.)
16ms / 115VAC, 230VAC

INPUT

VOLTAGE RANGENote.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≧50% / 115VAC,230VAC; @ load≧75% / 277VAC) (Please refer to " TOTAL HARMONIC DISTORTION (THD) " section)
EFFICIENCY (Typ.)
94%
AC CURRENT (Typ.) 12V
1.8A / 115VAC 0.8A / 230VAC 0.7A / 277VAC
AC CURRENT (Typ.) 15V ~ 54V
2.1A / 115VAC 0.9A / 230VAC 0.8A / 277VAC
INRUSH CURRENT (Typ.)
COLD START 65A(twidth=445μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER
4 units (circuit breaker of type B) / 7 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
Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE
47 ~ 53V Shut down o/p voltage with auto-recovery or re-power on to recovery
OVER TEMPERATURENote.9
Shut down o/p voltage, recovers automatically after temperature goes down

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 ~ 60℃)
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 61347-1, BS EN/EN 61347-2-13，AS/NZS 61347-1, AS/NZS 61347-2-13 independent;GB/T19510.1,GB/T19510.213 (except for D-type) ; IP65 or IP67; J61347-1, J61347-2-13(except for D-type) , EAC TP TC 004, KC61347-1,KC61347-2-13 (except for D-type) 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(except for D-type) ,EAC TP TC 020, KSC 9815(except for D-type)
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, KSC 9547(except for D-type)

OTHERS

MTBF
2184.8K hrs min. Telcordia SR-332 (Bellcore) ; 197.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
228*68*38.8mm (L*W*H)
PACKING
1.15Kg; 12pcs/14.8Kg/0.8CUFT

Certifications & ratings

Type
HL

MODEL ENCODING

Blank
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 (this model)
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 notes15
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
  2. 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. 3. Tolerance : includes set up tolerance, line regulation and load regulation.
  4. 4. Please refer to "DRIVING METHODS OF LED MODULE".
  5. 5. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
  6. 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. 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. 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. 9. For OTP which triggered at light load/no load condition, proceed AC repower on to recovery.
  10. 10. 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.
  11. 11. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com.
  12. 12. 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).
  13. 13. 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. 14. For A/AB type need to consider build in using to comply with Type HL application.
  15. 15. 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-185H-42AB BLOCK DIAGRAM
BLOCK DIAGRAM
HLG-185H-42AB DIMMING OPERATION
DIMMING OPERATION
HLG-185H-42AB Illustration (page 5)
Illustration (page 5)
HLG-185H-42AB STATIC CHARACTERISTICS
STATIC CHARACTERISTICS
HLG-185H-42AB TOTAL HARMONIC DISTORTION
TOTAL HARMONIC DISTORTION
HLG-185H-42AB LIFE TIME
LIFE TIME
HLG-185H-42AB Dimensions (mm)
Dimensions (mm)
HLG-185H-42AB ※AB-Type
※AB-Type
HLG-185H-42AB Dimensions (mm)
Dimensions (mm)
HLG-185H-42AB 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

FAQ

Can I use the HLG-185H-42AB with a building automation system to dim 42V LED fixtures?

Yes. The HLG-185H-42AB accepts 1-10VDC, 10V PWM or resistance dimming signals, so it works with building automation and lighting management systems that output one of these signals. At 184.8W and 42V with adjustable output, it provides both centralized dimming control and manual brightness calibration for 42V LED installations.

Is the HLG-185H-42AB suitable for dimmable 42V LED office or conference room lighting?

Yes. The 1-10V/PWM dimming input enables smooth brightness adjustment for 42V LED panels or troffers in offices and meeting rooms. The built-in potentiometer sets the maximum output level, and at 184.8W it can power substantial LED fixtures for general illumination.

Can the HLG-185H-42AB power 42V LED accent lighting in a hospitality or retail environment?

Yes. With 184.8W at 42V, dimming capability, and adjustable output, it works well for accent, display, or ambient lighting in hotels, restaurants, and retail stores where scene control matters. The 1-10V/PWM input pairs with standard dimming controllers for smooth transitions.

Can I use the HLG-185H-42AB for 42V LED grow lights in a greenhouse?

Yes, provided the total LED load stays within 184.8W. The dimming input allows daylight-responsive brightness control, and the adjustable output fine-tunes the drive level. The IP65/IP67-rated metal housing suits greenhouses within its 20-95% RH non-condensing humidity rating, though cable ends should be protected from direct water spray.

How many meters of 42V LED strip can the HLG-185H-42AB drive?

Divide 184.8W by your strip's wattage per meter. A strip rated at 20W/m would allow about 9.2 meters (184.8W / 20W per meter = 9.24m). Always check your strip's rated power per meter and keep total load at or below 184.8W.

Can the HLG-185H-42AB be used in a damp or semi-exposed environment like a covered loading dock?

Yes. The HLG-185H series has a metal housing with IP65/IP67 ingress protection that the datasheet says suits indoor and outdoor applications, including covered loading docks, open-sided warehouses, and other semi-exposed commercial spaces. Waterproof connectors are available for the output cable.

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Mean Well HLG-185H-42AB Power Supply 185W 42V - Adjustable and Dimmable 4.4A
Mean Well

Mean Well HLG-185H-42AB Power Supply 185W 42V - Adjustable and Dimmable 4.4A

$59.88 USD

HLG-185H-42AB is the 42V output model of this series: rated current 4.4A, rated power 184.8W, typical efficiency 94%. Type AB: Io and Vo adjustable through built-in potentiometer & 3 in 1 dimming function (1~10Vdc, 10V PWM signal and resistance) (IP65).

HLG-185H series is a 185W AC/DC LED driver featuring the dual mode constant voltage and constant current output. HLG-185H 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 IP65 ingress protection level allows this series to fit both indoor and outdoor applications. HLG-185H 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
  • IP65 rating for indoor or outdoor installations
  • Function options: output adjustable via potentiometer; 3 in 1 dimming
  • Typical lifetime > 62000 hours
  • 7 years warranty

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.

Model

  • 185W 42V
  • 185W 42V Adjustable
  • 185W 42V Adjustable and Dimmable
  • 185W 42V Dimmable
  • 240W 42V
  • 240W 42V Adjustable
  • 240W 42V Adjustable and Dimmable
  • 240W 42V Dimmable
  • 320W 42V
  • 320W 42V Adjustable
  • 320W 42V Adjustable and Dimmable
  • 320W 42V Dimmable
  • 480W 42V
  • 480W 42V Adjustable
  • 480W 42V Adjustable and Dimmable
  • 480W 42V Dimmable
  • 600W 42V
  • 600W 42V Adjustable
  • 600W 42V Adjustable and Dimmable
  • 600W 42V Dimmable
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