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Mean Well

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

fully isolated plastic caseIP67Class II design without FG
SKU LPF-40-20
$32.23 USD
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LPF-40-20
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Overview

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

LPF-40 series is a 40W AC/DC LED driver featuring the dual modes constant voltage and constant current output. LPF-40 operates from 90~305VAC and offers models with different rated voltage ranging between 12V and 54V. Thanks to the high efficiency up to 90%, 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.

Features

  • Constant Voltage + Constant Current mode output
  • Plastic housing with Class II design
  • Built-in active PFC function
  • Class 2 power unit
  • Fully encapsulated with IP67 level
  • Typical lifettime>50000 hours
  • 5 years warranty

Specifications

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

OUTPUT

DC VOLTAGE
20V
CONSTANT CURRENT REGIONNote.2
12 ~ 20V
RATED CURRENT
2A
RATED POWERNote.5
40W
RIPPLE & NOISE (max.)Note.3
150mVp-p
VOLTAGE TOLERANCENote.4
±4.0%
LINE REGULATION
±0.5%
LOAD REGULATION
±1.0%
SETUP, RISE TIMENote.6
1000ms, 80ms / 115VAC 500ms, 80ms / 230VAC
HOLD UP TIME (Typ.)
16ms/230VAC 16ms/115VAC

INPUT

VOLTAGE RANGENote.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 and latch off 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 STANDARDSNote.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, J61347-1, J61347-2-13,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 EMISSIONNote.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
3597.9K hrs min. Telcordia SR-332 (Bellcore) ; 438.9Khrs min. MIL-HDBK-217F (25℃)
DIMENSION
162.5*43*32mm (L*W*H)
PACKING
0.44Kg; 32pcs/15.08Kg/0.93CUFT
Test conditions and notes12
  1. 1. All parameters NOT specially mentioned are measured at 230VAC input, rated current and 25℃ of ambient temperature.
  2. 2. Please refer to "DRIVING METHODS OF LED MODULE".
  3. 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. 4. Tolerance : includes set up tolerance, line regulation and load regulation.
  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. 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. 10. Please refer to the warranty statement on MEAN WELL's website at http://www.meanwell.com
  11. 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. 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-40-20 BLOCK DIAGRAM
BLOCK DIAGRAM
LPF-40-20 OUTPUT LOAD vs TEMPERATURE
OUTPUT LOAD vs TEMPERATURE
LPF-40-20 STATIC CHARACTERISTIC
STATIC CHARACTERISTIC
LPF-40-20 TOTAL HARMONIC DISTORTION
TOTAL HARMONIC DISTORTION
LPF-40-20 LIFETIME(Kh)
LIFETIME(Kh)
LPF-40-20 MECHANICAL SPECIFICATION
MECHANICAL SPECIFICATION
LPF-40-20 Recommend Mounting Direction
Recommend Mounting Direction

Typical applications

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

Downloads

FAQ

Can I use the LPF-40-20 with 20V LED strip or linear lighting?

Yes, if the lighting product is designed for 20V input and the total load stays within 40W. This unit delivers 20V output at up to 2A, so it should only be paired with 20V lighting products that fit inside that power limit.

Is the LPF-40-20 a good fit for 20V sign lighting?

It can be used for 20V sign lighting loads up to 40W. The IP67 Waterproof rating also makes it appropriate for signage installations where the power supply may face outdoor moisture.

Can this power supply run 20V outdoor architectural lighting?

It can support 20V outdoor architectural or accent lighting as long as the connected load is within 40W. Its IP67 rating and -40°C to +80°C case temperature (Tcase) range make the driver itself suitable for exposed conditions.

How much 20V LED strip can the LPF-40-20 support?

The length depends on the strip's rated power per meter. Use 40W divided by the strip's W/m to estimate the maximum length, then confirm the strip is a 20V product and that total demand stays at or below 40W.

Is the LPF-40-20 suitable for wet locations?

Yes, the driver carries an IP67 Waterproof rating, so it is intended for wet and outdoor environments. It is rated for a case temperature (Tcase) of -40°C to +80°C, with load derating at higher temperatures per the sheet's output load vs temperature curve.

How does the LPF-40-20 compare with other LPF-40 voltage versions?

The fixed-output LPF-40 range includes 12V at 40.08W and 3.34A, 15V at 40.08W and 2.67A, 20V at 40W and 2A, 24V at 40.08W and 1.67A, 30V at 40.2W and 1.34A, 36V at 40.32W and 1.12A, 42V at 40.32W and 0.96A, 48V at 40.32W and 0.84A, and 54V at 41.04W and 0.76A. Selection is mainly about matching the required output voltage and current to the load.

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

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

$32.23 USD

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

LPF-40 series is a 40W AC/DC LED driver featuring the dual modes constant voltage and constant current output. LPF-40 operates from 90~305VAC and offers models with different rated voltage ranging between 12V and 54V. Thanks to the high efficiency up to 90%, 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.

Features

  • Constant Voltage + Constant Current mode output
  • Plastic housing with Class II design
  • Built-in active PFC function
  • Class 2 power unit
  • Fully encapsulated with IP67 level
  • Typical lifettime>50000 hours
  • 5 years warranty

Typical applications

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

Model

  • 16W 20V
  • 16W 20V Dimmable
  • 25W 20V
  • 25W 20V Dimmable
  • 40W 20V
  • 40W 20V Dimmable
  • 60W 20V
  • 60W 20V Dimmable
  • 90W 20V
  • 90W 20V Dimmable
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