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Mean Well HLG-185H-48B Power Supply 185W 48V- Dimmable 3.9A

4.9 (21 reviews)
premium quality7 years warrantyaluminium casinghigh efficiency
SKU HLG-185H-48B
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HLG-185H-48B
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Overview

HLG-185H-48B is the 48V output model of this series: rated current 3.9A, rated power 187.2W, typical efficiency 94%.

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 IP67/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
  • IP67 / 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-48BSpecifications from the official datasheet (2026-07-24 edition)

OUTPUT

DC VOLTAGE
48V
CONSTANT CURRENT REGIONNote.4
24 ~ 48V
RATED CURRENT
3.9A
RATED POWER
187.2W
RIPPLE & NOISE (max.)Note.2
200mVp-p
VOLTAGE ADJ. RANGE
Adjustable for A/AB-Type only (via built-in potentiometer) 43 ~ 53V
CURRENT ADJ. RANGE
Adjustable for A/AB-Type only (via built-in potentiometer) 1.95 ~ 3.9A
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
54 ~ 63V 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
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-48B BLOCK DIAGRAM
BLOCK DIAGRAM
HLG-185H-48B DIMMING OPERATION
DIMMING OPERATION
HLG-185H-48B Illustration (page 5)
Illustration (page 5)
HLG-185H-48B STATIC CHARACTERISTICS
STATIC CHARACTERISTICS
HLG-185H-48B TOTAL HARMONIC DISTORTION
TOTAL HARMONIC DISTORTION
HLG-185H-48B LIFE TIME
LIFE TIME
HLG-185H-48B MECHANICAL SPECIFICATION
MECHANICAL SPECIFICATION
HLG-185H-48B ※B-Type
※B-Type
HLG-185H-48B Dimensions (mm)
Dimensions (mm)
HLG-185H-48B ※AB-Type
※AB-Type
HLG-185H-48B Dimensions (mm)
Dimensions (mm)
HLG-185H-48B 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-48B with a 1-10V dimmer to control outdoor 48V LED lighting?

Yes. The HLG-185H-48B supports 1-10V, PWM and resistance dimming signals and has a metal housing with IP65/IP67 ingress protection designed for outdoor applications, making it a good fit for outdoor 48V LED installations that need dimming.

Is the HLG-185H-48B suitable for dimmable 48V LED signage mounted outdoors?

Yes. It delivers 187.2W at 48V with dimming input for night-mode or energy-saving brightness reduction. The IP65/IP67-rated housing suits outdoor mounting, and the 90-305VAC input handles varying mains voltages at sign locations.

Can the HLG-185H-48B drive 48V dimmable LED high-bay fixtures?

Yes. The 187.2W output at 48V is sufficient for medium-power high-bay pendants or industrial fixtures. The dimming input allows integration with occupancy sensors or daylight-harvesting controllers that output a 1-10V or PWM signal, and the constant-current mode with a 24-48V CC range accommodates varying forward voltages.

Can I use the HLG-185H-48B for dimmable 48V landscape or pathway lighting?

Yes. The IP65/IP67-rated metal housing, -40°C to +90°C case temperature range, and dimming input make it well suited for ground-level landscape, bollard, or pathway lighting, and waterproof connectors are available for the output cable in wet locations.

How many meters of 48V LED strip can the HLG-185H-48B power?

Divide 187.2W by the strip's rated power per meter. A 48V strip rated at 15W/m could run about 12.5 meters (187.2W / 15W per meter). Always verify your strip's rated power per meter and keep the total load at or below 187.2W.

Can the HLG-185H-48B handle installation in a flooded light well or underground vault?

The datasheet rates the HLG-185H series IP65/IP67 but does not specify a submersion depth or duration, so flooded light wells or underground vaults are not covered by the sheet. For wet locations, MEAN WELL offers waterproof M12/M15 connectors for the output cable and refers installers to the IP installation cautions in its user manual.

Payment & Security

Payment methods

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Customer reviews

4.9 Reviews verified for authenticity
5 ★ (19)
4 ★ (2)
3 ★ (0)
2 ★ (0)
1 ★ (0)

Reviewed by 21 customers across the HLG series

  1. Best outdoor driver we use

    By Hemi K.|2026-06-22✓ Verified Buyer
    Model: HLG-240H-24Quantity: 6

    HLG-240H-24 is IP67 and just keeps going. Powering a car-park flood install, 8 months no issues.

  2. Premium, worth it

    By Bright Spark|2026-06-01✓ Verified Buyer
    Model: HLG-185H-24Quantity: 4

    Built-in PFC, runs cool, DALI option on the B model. Our go-to.

  3. Flawless

    By Olivia D.|2026-05-09✓ Verified Buyer
    Model: HLG-320H-48Quantity: 2

    Drove a 48V architectural run for months, dead silent.

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Mean Well HLG-185H-48B Power Supply 185W 48V- Dimmable 3.9A
Mean Well

Mean Well HLG-185H-48B Power Supply 185W 48V- Dimmable 3.9A

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HLG-185H-48B is the 48V output model of this series: rated current 3.9A, rated power 187.2W, typical efficiency 94%.

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 IP67/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
  • IP67 / 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 48V
  • 185W 48V Adjustable
  • 185W 48V Dimmable
  • 185W 48V Adjustable and Dimmable
  • 240W 48V
  • 240W 48V Adjustable
  • 240W 48V Dimmable
  • 240W 48V Adjustable and Dimmable
  • 320W 48V
  • 320W 48V Adjustable
  • 320W 48V Dimmable
  • 320W 48V Adjustable and Dimmable
  • 480W 48V
  • 480W 48V Adjustable
  • 480W 48V Dimmable
  • 480W 48V Adjustable and Dimmable
  • 600W 48V
  • 600W 48V Adjustable
  • 600W 48V Dimmable
  • 600W 48V Adjustable and Dimmable
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