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Mean Well XLG-20-M-B 21W 500mA 25.2-42V Constant Current LED Driver, 3 in 1 Dimmable

metal caseeconomical100~305VAC wide range inputefficiency up to 90%

SKU XLG-20-M-B

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Overview

XLG-20-M-B is the model of this series: rated power 21W, typical efficiency 88.5%. Type B: Io fixed with 3 in 1 dimming function (1~10Vdc, 10V PWM signal and resistance) (IP67).

XLG-20 series is a AC/DC LED driver featuring the constant current mode output. XLG-20 operates from 90~305VAC. Thanks to the high efficiency up to 89%, The entire series is able to operate between -40℃ ~+80℃ wide case temperature range with air convection. The design of metal housing and IP67 ingress protection allows this series to fit both indoor and outdoor applications.XLG-20 is equipped with various function options, such as dimming methodologies, so as to provide the optimal design flexibility for LED lighting system.XLG-20 series comply with the latest version of IEC61347/GB7000.1 -2015 and UL8750 international safety regulations. The output and dimming circuit are also completely in accordance with the new regulations with isolation to ensure the safety of both user and luminaire system during installation.

Features

Constant current mode output
Wide input range 90~305VAC (Class Ⅰ)
Built-in active PFC function
Class 2 power unit
No load power consumption <0.5W
IP67 rating for indoor or outdoor installations
3 in 1 dimming function (Isolation design)
Life time>50,000 hours and 5 years warranty

Specifications

XLG-20-M-BSpecifications from the official datasheet (2026-02-04 edition)

OUTPUT

RATED CURRENT (Default): 500mA
CONSTANT CURRENT REGION: 25.2 ~ 42V
RATED POWER: 21W
OPEN CIRCUIT VOLTAGE (max.): 50V
CURRENT TOLERANCE: ±8.0%
OUTPUT CURRENT RIPPLE^Note.13: < 20%
SETUP, RISE TIME^Note.2: 500ms, 150ms/115VAC, 230VAC
LINE REGULATION: < ±3%

INPUT

VOLTAGE RANGE^Note.3: 90 ~ 305VAC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR: PF≧0.97/115VAC, PF≧0.95/230VAC, PF≧0.91/277VAC@full load (Please refer to "POWER FACTOR (PF) CHARACTERISTIC" section)
TOTAL HARMONIC DISTORTION: THD< 20%(@load≧50%/115VC,230VAC; @load≧75%/277VAC) (Please refer to “TOTAL HARMONIC DISTORTION(THD)” section)
EFFICIENCY (Typ.): 88.5%
AC CURRENT: 0.3A / 115VAC 0.2A / 230VAC 0.2A/277VAC
INRUSH CURRENT(Typ.): COLD START 5A(twidth=350μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 42 units (circuit breaker of type B) / 42 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.75mA / 277VAC
NO LOAD POWER CONSUMPTION: No load power consumption <0.5W

PROTECTION

SHORT CIRCUIT: Hiccup mode, recovers automatically after fault condition is removed.

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.: -40 ~ +80℃
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. 250.13-12; ENEC AS/NZS IEC BS EN/EN61347-1, AS/NZS BS EN/EN61347-2-13 independent, BS EN/EN62384; IP67; GB/T19510.1, GB/T19510.213, J61347-1(H29), J61347-2-13(H29), EAC TP TC 004, IS 15885(Part 2/Sec13) , KC61347-1,KC61347-2-13 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: Parameter Standard Test Level

Conducted BS EN/EN55015(CISPR15) ,GB/T 17743,J55015(H29)
Radiated BS EN/EN55015(CISPR15) ,GB/T 17743,J55015(H29)
Harmonic Current BS EN/EN61000-3-2 ,GB17625.1 Class C @load≥50%
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN61547

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact
Radiated BS EN/EN61000-4-3 Level 3
EFT/Burst BS EN/EN61000-4-4 Level 3
Surge BS EN/EN61000-4-5 2KV/Line-Line 4KV/Line-Earth
Conducted BS EN/EN61000-4-6 Level 3
Magnetic Field BS EN/EN61000-4-8 Level 4
Voltage Dips and Interruptions BS EN/EN61000-4-11 >95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

Parameter	Standard	Test Level
Conducted	BS EN/EN55015(CISPR15) ,GB/T 17743,J55015(H29)
Radiated	BS EN/EN55015(CISPR15) ,GB/T 17743,J55015(H29)
Harmonic Current	BS EN/EN61000-3-2 ,GB17625.1	Class C @load≥50%
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact
Radiated	BS EN/EN61000-4-3	Level 3
EFT/Burst	BS EN/EN61000-4-4	Level 3
Surge	BS EN/EN61000-4-5	2KV/Line-Line 4KV/Line-Earth
Conducted	BS EN/EN61000-4-6	Level 3
Magnetic Field	BS EN/EN61000-4-8	Level 4
Voltage Dips and Interruptions	BS EN/EN61000-4-11	>95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

OTHERS

MTBF: 5721.2K hrs min. Telcordia SR-332 (Bellcore) 747.1Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 95*63*30mm (L*W*H)
PACKING: 0.34Kg;24pcs/ 8.67Kg/0.81CUFT for blank-type 0.35Kg;24pcs/ 8.88Kg/0.\81CUFT for B-type

Certifications & ratings

Type: HL

MODEL ENCODING

Blank: Io fixed; IP67
B (this model): Io fixed with 3 in 1 dimming function (1~10Vdc, 10V PWM signal and resistance); IP67

Test conditions and notes13

1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
2. 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.
3. De-rating may be needed under low input voltages. Please refer to “STATIC CHARACTERISTIC” sections for details.
4. 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)
5. This series meets the typical life expectancy of >50,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 80℃ or less.
6. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com
7. 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).
8. Products sourced from the Americas regions may not have the CCC/PSE/BIS/KC logo. Please contact your MEAN WELL sales for more information.
9. 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
10. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
11. To fulfill requirements of the latest ErP regulation for lighting fixture, this LED driver can only be used behind a switch without permanently connected to the mains.
12. If you need the NOM (Mexico) certificate, Please contact MEAN WELL sales representative for details.
13. Output current ripple is meansured at 230VAC input, full load and 25℃ of ambient temperature.

Technical drawings

XLG-20-M-B OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

XLG-20-M-B STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

XLG-20-M-B TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

XLG-20-M-B DIMMING OPERATION — DIMMING OPERATION

XLG-20-M-B Mechanical Specification ※ B-Type — Mechanical Specification ※ B-Type

XLG-20-M-B Recommend Mounting Direction — Recommend Mounting Direction

Typical applications

Street lighting
Architectural lighting
Low bay lighting
Floodlight lighting
Industrial Lighting
Type "HL" for use in Class I, Division 2 hazardous (Classified) location.

Downloads

Datasheet1

XLG-20-M-B datasheetXLG-20-SPEC.PDF · 2026-02-04 edition PDF Download

Certificates2

Mean Well IDLC Series UL Certificate PDF Download

Mean Well IDLC Series EAC Certificate PDF Download

FAQ

Can the XLG-20-M-B drive LED downlights in a dimmable ceiling installation?

Yes. The XLG-20-M-B provides 21W at 500mA constant current (25–42V range) with 3-in-1 dimming support via PWM, resistance, or 1–10V analog signal. This makes it compatible with standard 0–10V dimmer systems used in commercial LED downlight installations.

Is this driver suitable for dimmable outdoor LED signage?

Yes. The IP67 waterproof rating and –40°C to +80°C operating range allow outdoor deployment in sign cabinets. The 3-in-1 dimming feature enables brightness scheduling or daylight-responsive control for illuminated sign modules whose forward voltage falls within 25–42V.

Can I use the XLG-20-M-B in a museum or gallery LED accent array that requires dimming?

Yes. Its constant current output at 500mA with analog 1–10V dimming makes it suitable for gallery LED accent fixtures where smooth, flicker-free dimming is required. Ensure the LED array's total forward voltage is within the 25–42V CC range.

What dimming methods does the XLG-20-M-B support?

The XLG-20-M-B supports 3-in-1 dimming: PWM signal, resistance dimming, and 1–10V analog input. All three methods are built into the same driver, so only one control signal type is used at a time depending on the connected controller.

Can the XLG-20-M-B be installed in an outdoor enclosure in a cold climate?

Yes. With an operating range of –40°C to +80°C and IP67 waterproof certification, it withstands outdoor environments including freezing temperatures and direct rain exposure. The 90–305VAC wide input range accommodates global mains voltages.

How does the XLG-20-M-B compare to the XLG-20-H-B and XLG-20-L-B?

All three share the 3-in-1 dimmable, IP67, 20W-class design. The XLG-20-H-B delivers 700mA over an 18–30V range at 21W; the XLG-20-M-B delivers 500mA over a 25.2–42V range at 21W; the XLG-20-L-B delivers 350mA over a 32.4–54V range at 18.9W. Match the variant to your LED string's required drive current and forward voltage.

How many LEDs can the XLG-20-M-B drive in a series string?

The constant current output range is 25–42V at 500mA. The number of series-connected LEDs depends on each LED's individual forward voltage — no single LED count applies universally. Verify the full string's total forward voltage sits within 25–42V.

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