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Mean Well LDC-55B Linear LED Driver 55W 500~1600mA Adjustable Output - Dimmable

constant powerflicker freeultra slim design30mm width

SKU LDC-55B

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Overview

LDC-55B is the model of this series: rated power 55W, typical efficiency 90%(230VAC@Full load). Type B: 3 in 1 dimming function (0~10Vdc and10V PWM signal and resistance).

LDC-55 series is a 55W AC/DC LED driver featuring the Constant Power mode output. LDC-55 operates from 180~295VAC and output current can be adjust between 500mA to 1600mA. Thanks to the efficiency up to 90%, with the fanless design, the entire series is able to operate -25℃~+80℃ case temperature under free air convection.LDC-55 is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for LED lighting system.

Features

Constant Power mode output
Metal housing design
Full Power at 70~100% max Current
Built-in active PFC function
Flicker Free design
Class 2 power supply
No load / Standby power consumption <0.5W
Output current level pre-settable
Function options: 3 in 1 dimming (dim-to-off)
Typical lifetime>50000 hours
SELV and Isolated
5 years warranty

Specifications

LDC-55BSpecifications from the official datasheet (2026-02-09 edition)

OUTPUT

OUTPUT CURRENT REGION: 500 ~ 1600mA(1050mA default)
RATED POWER^Note.2: 55W
CONSTANT CURRENT REGION^Note.2: 27 ~ 56V
FULL POWER CURRENT RANGE: 980 ~ 1600mA
OPEN CIRCUIT VOLTAGE(max.): 60V
LOW FREQUENCY CURRENT RIPPLE: 3.0% max. @rated current
CURRENT TOLERANCE: ±5.0%
SET UP TIME^Note.4: 500ms/230VAC

INPUT

VOLTAGE RANGE^Note.3: 180 ~ 295VAC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF≧0.95/230VAC@load≧50%; PF≧0.9/277VAC@load≧75% (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION: THD< 10%(@load≧50%/230VAC; @load≧75%/277VAC) (Please refer to “TOTAL HARMONIC DISTORTION(THD)” section)
EFFICIENCY (Typ.)^Note.6: 90%(230VAC@Full load)
AC CURRENT (Typ.): 0.35A / 230VAC 0.25A / 277VAC
INRUSH CURRENT(Typ.): COLD START 30A(twidth=300μs measured at 50% Ipeak)/230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 17 units (circuit breaker of type B) / 29 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.75mA / 277VAC

PROTECTION

SHORT CIRCUIT: Hiccup mode or constant current limiting ,recovers automatically after fault condition is removed
OVER VOLTAGE: 61 ~ 80V Shut down o/p voltage with auto-recovery or re-power on to recovery
OVER TEMPERATURE: Shut down o/p voltage, with auto-recovery

FUNCTION

DIMMING: Please refer to“DIMMING OPERATION”section
TEMP. COMPENSATION: By external NTC, please refer to“TEMPERATURE COMPENSATION OPERATION”section

ENVIRONMENT

WORKING TEMP.: Tcase=-25 ~ +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, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^Note.5: Ul8750, CSA C22.2 No. 250.13-12; ENEC BS EN/EN61347-1, BS EN/EN61347-2-13, AS/NZS 61347.1, AS/NZS IEC 61347.2.13; BS EN/EN62384; GB/T19510.1,GB/T19510.213, EAC TP TC 004, BIS IS15885 approved
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC I/P-FG:2.0KVAC 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.5: Compliance to BS EN/EN55015,BS EN/EN61000-3-2 Class C (@load≧50%) ; BS EN/EN61000-3-3;GB/T17743, GB17625.1,EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11; BS EN/EN61547, light industry level(surge immunity:Line-Earth: 2KV,Line-Line:1KV),EAC TP TC 020

OTHERS

MTBF: 2521K hrs min. Telcordia SR-332 (Bellcore) 226.1Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 320*30*21mm (L*W*H)
PACKING: 0.255Kg;48pcs/13.24Kg/0.92CUFT

MODEL ENCODING

Blank: Non dimming
B (this model): 3 in 1 dimming function (0~10Vdc and10V PWM signal and resistance)
DA: DALI,push dimming
DA2: DALI-2,push dimming

Test conditions and notes9

1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
2. Please refer to " OUTPUT CURRENT SETTING ".
3. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
4. Length of set up time is measured at first cold start. Turning ON/OFF the power supply may lead to increase of the set up time.
5. 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)
7. This series meets the typical life expectancy of >50000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 70℃ or less.
8. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com.
9. 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).
10. To fulfill requirements of the latest ErP regulation for lighting fixtures, this LED power supply can only be used behind a switch without permanently connected to the mains.

Technical drawings

LDC-55B OUTPUT CURRENT SETTING — OUTPUT CURRENT SETTING

LDC-55B DIMMING OPERATION — DIMMING OPERATION

LDC-55B TEMPERATURE COMPENSATION OPERATION (2) — TEMPERATURE COMPENSATION OPERATION (2)

LDC-55B STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

LDC-55B TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

LDC-55B MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

Typical applications

LED panel lighting
Indoor LED lighting
Linear LED lighting

Downloads

Datasheet1

LDC-55B datasheetLDC-55-SPEC.PDF · 2026-02-09 edition PDF Download

Certificates10

Mean Well LDC-35 UL Certificate PDF Download

Mean Well LDC-35 BIS Certificate PDF Download

Mean Well LDC-55 EAC Certificate PDF Download

Mean Well LDC-55 CB Certificate PDF Download

Mean Well LDC-55 CCC Certificate PDF Download

Mean Well LDC-55 CE Certificate PDF Download

Mean Well LDC-55 EMC Certificate PDF Download

Mean Well LDC-55 ENEC Certificate PDF Download

Mean Well LDC-55 SAA Certificate PDF Download

Mean Well LDC-55 UK Certificate PDF Download

Test reports1

Mean Well LDC-35 Test Report PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can the LDC-55B be used for dimmable higher-power LED downlights?

Yes, if the fixture is built for constant current operation at a current within the 500-1600mA adjustable range and the LED load is within the 27-56V constant current range. This is a 55W driver with 3-in-1 dimming (0-10VDC, 10V PWM or resistance), meant for LED loads that need regulated current instead of constant voltage input.

Is the LDC-55B suitable for dimmable signage modules?

It can be suitable for signage modules designed as a constant current load within 27-56V at a current set between 500 and 1600mA. It should not be selected for signage products that expect a constant voltage source, because this model regulates output current.

Can I use the LDC-55B on a small LED array where dimming is needed?

Yes, if the array is specified for constant current drive within the 500-1600mA range and its combined forward voltage stays within the 27-56V CC range. Dimming is applied between DIM+ and DIM- by 0-10VDC, 10V PWM or resistance, down to a minimum level of about 8%.

How do I check LED compatibility with the LDC-55B?

The LED load needs to be a constant current design rated for a current within 500-1600mA (1050mA default), with a total forward voltage inside the 27-56V range. The number of LEDs depends on the forward voltage of each LED, so compatibility should be evaluated from the full LED load voltage rather than a fixed LED count.

What operating conditions is the LDC-55B rated for?

The listed working temperature is Tcase -25°C to +80°C (see the output load vs temperature derating curve), with 20-95% RH non-condensing humidity. No IP rating is shown in the provided specs, so wet-location or exposed-environment use should be evaluated at the fixture or enclosure level.

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Model	Power	Voltage	Current	IP Rating
Mean Well LDC-80DA2 Linear LED Driver 80W 700~2100mA Adjustable Output - DALI2	80W	60V	1400 Milliampere	IP20	View
Mean Well LDC-80DA Linear LED Driver 80W 700~2100mA Adjustable Output - DALI	80W	60V	700 Milliampere	IP20	View
Mean Well LDC-80B Linear LED Driver 80W 700~2100mA Adjustable Output - Dimmable	80W	60V	700 Milliampere	IP20	View
Mean Well LDC-80 Linear LED Driver 80W 700~2100mA Adjustable Output	80W	60V	700 Milliampere	IP20	View
Mean Well LDC-55DA2 Linear LED Driver 55W 500~1600mA Adjustable Output - DALI2	55W	60V	1050 Milliampere	IP20	View
Mean Well LDC-55DA Linear LED Driver 55W 500~1600mA Adjustable Output - DALI	55W	60V	500 Milliampere	IP20	View
Mean Well LDC-55 Linear LED Driver 55W 500~1600mA Adjustable Output	55W	60V	500 Milliampere	IP20	View
Mean Well LDC-35DA Linear LED Driver 35W 300~1000mA Adjustable Output - DALI	35W	60V	300 Milliampere	IP20	View
Mean Well LDC-35B Linear LED Driver 35W 300~1000mA Adjustable Output - Dimmable	35W	60V	300 Milliampere	IP20	View
Mean Well LDC-35 Linear LED Driver 35W 300~1000mA Adjustable Output	35W	60V	300 Milliampere	IP20	View

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