Mean Well ELG-240-42DA Power Supply 240W 42V - DALI | ELG Series | Constant Voltage + Constant Current LED Driver

Name: Mean Well ELG-240-42DA Power Supply 240W 42V - DALI 5.71A
Brand: Mean Well
SKU: ELG-240-42DA
Price: 65.91 USD
Availability: InStock

Overview

ELG-240-42DA is the 42V output model of this series: rated current 5.71A, typical efficiency 92.5%.

ELG-240 series is a 240W AC/DC LED driver featuring the dual mode constant voltage and constant current output. ELG-240 operates from 100～305VAC and offers models with different rated voltage ranging between 24V and 54V. Thanks to the high efficiency up to 93%, 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. ELG-240 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 design with functional Ground
Built-in active PFC function
No load / Standby power consumption <0.5W
IP67 / IP65 rating for indoor or outdoor installations
Function options: output adjustable via potentiometer; 3 in 1 dimming (dim-to-off) ; Smart timer dimming; DALI
Typical lifetime>50000 hours
5 years warranty

Specifications

ELG-240-42DASpecifications from the official datasheet (2026-07-06 edition)

OUTPUT

DC VOLTAGE: 42V
CONSTANT CURRENT REGION^Note.2: 21 ~ 42V
RATED CURRENT: 5.71A
RATED POWER 200VAC ~ 305VAC: 239.82W
RATED POWER 100VAC ~ 180VAC: 179.76W
RIPPLE & NOISE (max.)^Note.3: 250mVp-p
VOLTAGE ADJ. RANGE: Adjustable for A/AB-Type only (via built-in potentiometer) 39 ~ 45V
CURRENT ADJ. RANGE: Adjustable for A/AB-Type only (via built-in potentiometer) 2.86 ~ 5.71A
VOLTAGE TOLERANCE^Note.4: ±2.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME^Note.6: 500ms, 100ms/230VAC, 1000ms, 100ms/115VAC
HOLD UP TIME (Typ.): 10ms/ 230VAC 10ms/ 115VAC

INPUT

VOLTAGE RANGE^Note.5: 100 ~ 305VAC 142 ~ 431VDC (Please refer to "STATIC CHARACTERISTIC" section)
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR: PF≧0.97/115VAC, 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%/115VC,230VAC; @load≧75%/277VAC) (Please refer to “TOTAL HARMONIC DISTORTION(THD)” section)
EFFICIENCY (Typ.): 92.5%
AC CURRENT: 2.2A / 115VAC 1.5A / 230VAC 1.2A/277VAC
INRUSH CURRENT(Typ.): COLD START 60A(twidth=510μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 4 units (circuit breaker of type B) / 6 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.75mA / 277VAC
NO LOAD / STANDBY POWER CONSUMPTION^Note.7: No load power consumption <0.5W for Blank / A -Type Standby power consumption <0.5W for B / AB / DA-Type

PROTECTION

OVER CURRENT: 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: 47 ~ 54V Shut down output voltage, re-power on to recover
OVER TEMPERATURE: Shut down output 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 ~ +90℃, 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. 250.13-12;IEC/BS EN/EN/AS/NZS 61347-1, IEC/BS EN/EN/AS/NZS 61347-2-13 independent, BS EN/EN62384; EAC TP TC 004;BIS IS15885(for 24/24A/24B/24DA/36/36A/36B/42/42A/42B/48/48A/48B/54/54A/54ADA/54B only); GB/T19510.1,GB/T19510.213; IP65 or IP67;KC61347-1,KC61347-2-13 approved
DALI STANDARDS: Compliance to IEC62386-101,102,(207 by request) for DA Type only
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: Compliance to BS EN/EN55015,BS EN/EN61000-3-2 Class C (@load≧50%) ; BS EN/EN61000-3-3; GB/T 17743, GB17625.1;EAC TP TC 020; KC KN15,KN61547
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 6KV, Line-Line 4KV);EAC TP TC 02; KC KN15,KN61547

OTHERS

MTBF: 2391.4K hrs min. Telcordia SR-332 (Bellcore) ; 190.7K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 244*71*37.5mm (L*W*H)
PACKING: 1.22Kg; 12pcs / 15.2Kg / 0.72CUFT

Certifications & ratings

Type: HL

Test conditions and notes14

1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
2. Please refer to "DRIVING METHODS OF LED MODULE".
3. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
4. Tolerance : includes set up tolerance, line regulation and load regulation.
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. No load/standby power consumption is specified for 230VAC input.
8. 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)
9. This series meets the typical life expectancy of >50,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 70℃ 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. 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.
14. For A/AB type need to consider build in using to comply with Type HL application.

Technical drawings

ELG-240-42DA Block Diagram — Block Diagram

ELG-240-42DA DIMMING OPERATION — DIMMING OPERATION

ELG-240-42DA OUTPUT LOAD vs TEMPERATURE(Note.10) — OUTPUT LOAD vs TEMPERATURE(Note.10)

ELG-240-42DA STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

ELG-240-42DA TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

ELG-240-42DA MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

ELG-240-42DA Dimensions (mm) — Dimensions (mm)

ELG-240-42DA ※ 3Y Model (3-wire input) — ※ 3Y Model (3-wire input)

ELG-240-42DA Recommend Mounting Direction — Recommend Mounting Direction

Typical applications

LED street lighting
LED architectural lighting
LED bay lighting
LED floodlighting
Type “HL” for use in Class I, Division 2 hazardous (Classified) location.

Downloads

Certificates4

CB Certificate (ELG-240)(EN) PDF Download

UL Certificate (ELG-240)(EN) PDF Download

EMC Certificate (ELG-240)(EN) PDF Download

ENEC Certificate (ELG-240)(EN) PDF Download

Test reports1

Test Report (ELG-240-42)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Does the ELG-240-42DA support DALI lighting control?

Yes. The 'DA' suffix designates DALI (Digital Addressable Lighting Interface) dimming control, compliant with IEC62386-101 and 102. The ELG-240-42DA can be addressed and dimmed individually or as part of a DALI group (16 groups, 64 addresses) within a building management system.

Can the ELG-240-42DA be used for outdoor LED strip lighting in a commercial facade project?

Yes. The IP65/IP67 rating makes it suitable for outdoor facades, and it delivers 239.82W at 42V with 5.71A output current. The -40°C to +90°C case temperature range (max. ambient 60°C at rated current in constant-current mode) accommodates harsh outdoor climates.

How much 42V LED strip can the ELG-240-42DA drive?

The driver's maximum output is 239.82W at 42V on 200–305VAC input (179.76W on 100–180VAC). For a 42V strip rated at 15W per meter, that yields up to 15.9 meters (239.82 ÷ 15 ≈ 15.9 m). If you want 20% headroom, about 192W covers roughly 12.8 meters at that density; check your strip's rated watts per meter to verify.

Is the ELG-240-42DA suitable for wet indoor environments such as swimming pool surrounds?

The IP65/IP67 rating means the enclosure is dust-tight and water-resistant, making it appropriate for wet indoor areas like pool surrounds or car wash facilities when mounted in an accessible but protected position. Note that the working humidity is specified as 20–95% RH non-condensing.

Can the ELG-240-42DA be used in a smart building project that uses DALI for scene control?

Yes. The DALI interface allows integration with DALI-compatible controllers and scene management systems. It provides 239.82W at 42V, which is sufficient for large-area LED installations that need zone-level or fixture-level address control.

How does the ELG-240-42DA differ from the ELG-240-42B?

Both are 239.82W, 42V, 5.71A units in the same 244 × 71 × 37.5 mm IP65/IP67-rated ELG-240 housing. The ELG-240-42B uses 3-in-1 dimming (0–10V, PWM, resistance) on its DIM+/DIM- leads; the ELG-240-42DA has a DALI interface (DA+/DA-) for addressable digital control. An ELG-240-42D2 is not listed on this datasheet.

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Model	Power	Voltage	Current	IP Rating
Mean Well ELG-240-54 Power Supply 240W 54V 4.45A	240.3W	54V	4.45A	IP67	View

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Mean Well ELG-240-42DA Power Supply 240W 42V - DALI 5.71A

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Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Certifications & ratings

Technical drawings

Typical applications

Downloads

Certificates4

Test reports1

Catalogues1

FAQ

Payment & Security

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Mean Well ELG-240-42DA Power Supply 240W 42V - DALI 5.71A

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