Mean Well LPF-40D-20 Power Supply 40W 20V - Dimmable

Name: Mean Well LPF-40D-20 Power Supply 40W 20V - Dimmable 2A
Brand: Mean Well
SKU: LPF-40D-20
Price: 34.57 USD
Availability: InStock

Overview

LPF-40D-20 is the 20V output model of this series: rated current 2A, rated power 40W, typical efficiency 86%.

LPF-40D series is a 40W AC/DC LED driver featuring the constant current output. LPF-40D operates from 90~305VAC and offers models with different rated voltage ranging between 12V and 54V. Thanks to the efficiency up to 89%, with the fanless design, the entire series is able to operate for -40℃ ~ +80℃ case temperature under free air convection. The entire series is rated with IP67 ingress protection level and is suitable to work for a variety of applications at dry, damp or wet locations. LPF-40D is equipped with the 3 in 1 dimming function so as to provide the design flexibility for LED lighting system.

Features

Constant current mode output
Plastic housing with Class II design
Built-in active PFC function
Class 2 power unit
IP67 rating for indoor or outdoor installations
Function: 3 in 1 dimming
Typical lifettime>50000 hours
5 years warranty

Specifications

LPF-40D-20Specifications from the official datasheet (2026-02-09 edition)

OUTPUT

DC VOLTAGE: 20V
RATED CURRENT: 2A
RATED POWER^Note.5: 40W
CONSTANT CURRENT REGION^Note.2: 12 ~ 20V
CURRENT RIPPLE: 5.0% max. @rated current
CURRENT TOLERANCE: ±5.0%
SETUP, RISE TIME^Note.6: 1000ms, 80ms / 115VAC 500ms, 80ms / 230VAC
HOLD UP TIME (Typ.): 16ms/230VAC 16ms/115VAC

INPUT

VOLTAGE RANGE^Note.5: 90 ~ 305VAC 127 ~ 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≧60%/115VC,230VAC; @load≧75%/277VAC) (Please refer to “TOTAL HARMONIC DISTORTION(THD)” section)
EFFICIENCY (Typ.): 86%
AC CURRENT: 0.6A / 115VAC 0.3A / 230VAC 0.25A/277VAC
INRUSH CURRENT(Typ.): COLD START 50A(twidth=210μs measured at 50% Ipeak) at 230VAC; Per NEMA 410
MAX. No. of PSUs on 16A CIRCUIT BREAKER: 12 units (circuit breaker of type B) / 20 units (circuit breaker of type C) at 230VAC
LEAKAGE CURRENT: <0.75mA / 240VAC

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: 23 ~ 27V Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover

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., HUMIDITY: -40 ~ +80℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 5G 12min./1cycle, period for 72min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^Note.8: UL8750, CSA C22.2 No. 250.0-08, ENEC BS EN/EN61347-1, BS EN/EN61347-2-13 independent, BS EN/EN62384 , EAC TP TC 004 , IP67, GB/T19510.1,GB/T19510.213 approved ; design refer to UL60950-1
WITHSTAND VOLTAGE: I/P-O/P:3.75KVAC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION^Note.8: Compliance to BS EN/EN55015,BS EN/EN61000-3-2 Class C (@load≧60%) ; BS EN/EN61000-3-3, GB/T 17743 , 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-Line 2KV),EAC TP TC 020

OTHERS

MTBF: 3439.0K hrs min. Telcordia SR-332 (Bellcore) ; 394.9Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 162.5*43*32mm (L*W*H)
PACKING: 0.45Kg; 32pcs/15.4Kg/0.93CUFT

Test conditions and notes12

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. 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. 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. This series meets the typical life expectancy of >50,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 75℃ 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

Technical drawings

LPF-40D-20 BLOCK DIAGRAM — BLOCK DIAGRAM

LPF-40D-20 DIMMING OPERATION — DIMMING OPERATION

LPF-40D-20 Illustration (page 5) — Illustration (page 5)

LPF-40D-20 OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

LPF-40D-20 STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

LPF-40D-20 TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

LPF-40D-20 MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

LPF-40D-20 Recommend Mounting Direction — Recommend Mounting Direction

Typical applications

LED panel lighting
LED downlight
LED decorative lighting
LED tunnel lighting
Moving sign

Downloads

Certificates5

UL Certificate (LPF-40D)(EN) PDF Download

CB Certificate (LPF-40D)(EN) PDF Download

EMC Certificate (LPF-40D)(EN) PDF Download

ENEC Certificate (LPF-40D)(EN) PDF Download

PSE Certificate (LPF-40D)(EN) PDF Download

Test reports1

Test Report(LPF-40D-20)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the LPF-40D-20 with a 20V LED strip for illuminated displays?

Yes, if the display lighting is a constant-current LED load within the 12-20V CC region, 2A and 40W total. The built-in 3 in 1 dimming is useful for display applications that need brightness adjustment.

Is this a good choice for 20V signage lighting that needs dimming?

It is suitable for 20V signage lighting loads that stay within the driver's 40W output and 2A current limit. The 12-20V CC range and dimmable design make it appropriate for controlled 20V LED lighting applications.

Can the LPF-40D-20 power 20V linear lighting in a damp environment?

Yes, for constant-current linear lighting products within the 12-20V CC region, 2A and 40W total. Its IP67 waterproof rating supports use in damp or wet environments where a sealed driver is needed.

How do I estimate the maximum 20V LED strip length for this driver?

This is a constant-current driver, so size by current and voltage: the strip must be designed for 2A constant current with a voltage within 12-20V. Check your strip's rated current and voltage, and make sure the full load stays within 40W.

Can this driver be used outdoors?

The LPF-40D-20 has an IP67 waterproof rating, so it is designed for outdoor and wet-location use where that protection level is appropriate. It is rated for a case temperature (Tcase) of -40°C to +80°C, with load derating at higher temperatures.

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Mean Well LPF-40D-20 Power Supply 40W 20V - Dimmable 2A

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