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Mean Well LPF-40-12 Power Supply 40W 12V 3.34A

Name: Mean Well LPF-40-12 Power Supply 40W 12V 3.34A
Brand: Mean Well
SKU: LPF-40-12
Price: 27.82 USD
Availability: InStock

fully isolated plastic caseIP67Class II design without FG

SKU LPF-40-12

$27.82 USD

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Select model — 8 in this family

LPF-40-12

LPF-16-12 Fixed output Low stock $24.48 USD

LPF-16D-12 Dimmable Backorder $23.34 USD

LPF-25-12 Fixed output In stock $20.37 USD

LPF-25D-12 Dimmable Low stock $27.50 USD

LPF-40-12 Fixed output In stock $27.82 USD

LPF-40D-12 Dimmable Low stock $27.44 USD

LPF-60-12 Fixed output Low stock $33.90 USD

LPF-60D-12 Dimmable Backorder $31.37 USD

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Overview

LPF-40-12 is the 12V output model of this series: rated current 3.34A, rated power 40.08W, typical efficiency 84%.

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-40-12Specifications from the official datasheet (2026-02-09 edition)

OUTPUT

DC VOLTAGE: 12V
CONSTANT CURRENT REGION^Note.2: 7.2 ~12V
RATED CURRENT: 3.34A
RATED POWER^Note.5: 40.08W
RIPPLE & NOISE (max.)^Note.3: 150mVp-p
VOLTAGE TOLERANCE^Note.4: ±4.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±2.0%
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.): 84%
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: 15 ~ 17V 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 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, 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 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: 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. 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-40-12 OUTPUT LOAD vs TEMPERATURE — OUTPUT LOAD vs TEMPERATURE

LPF-40-12 STATIC CHARACTERISTIC — STATIC CHARACTERISTIC

LPF-40-12 TOTAL HARMONIC DISTORTION — TOTAL HARMONIC DISTORTION

LPF-40-12 MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

LPF-40-12 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-40)(EN) PDF Download

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

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

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

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

Test reports1

Test Report(LPF-40-12)(EN) PDF Download

Catalogues1

Mean Well LED Driver Catalog PDF Download

FAQ

Can I use the LPF-40-12 for 12V LED strip lighting?

Yes, it can be used for 12V LED strip lighting as long as the total strip load stays within 40.08W. It provides 12V output at up to 3.34A, so the strip voltage must match 12V and the total wattage must not exceed the driver rating.

Is the LPF-40-12 suitable for 12V LED sign modules?

It is suitable for 12V LED sign modules when the full sign load is 40.08W or less. The 12V output matches 12V signage products, and the IP67 housing makes it a fit for signs exposed to weather.

Can this driver power outdoor 12V accent or landscape lighting?

It can be used for outdoor 12V lighting loads that stay within 40.08W. The unit is rated IP67 Waterproof and specified for a case temperature (Tcase) of -40°C to +80°C, which supports use in wet and demanding outdoor conditions.

How much 12V LED strip can the LPF-40-12 run?

Maximum strip length depends on the strip's watts per meter. The math is 40.08W divided by your strip's rated W/m, and you should also confirm the strip is a 12V product and keep the total load at or below 40.08W.

Is the LPF-40-12 okay for wet locations or outdoor signage?

Yes, the IP67 Waterproof rating means it is intended for wet and outdoor environments. Its case temperature (Tcase) range is -40°C to +80°C, with load derating at high temperatures, so it is suited to both cold and hot conditions when the rest of the system is rated the same way.

How does the LPF-40-12 compare with other LPF-40 models?

Within the LPF-40 series, the fixed-output models are LPF-40-12 at 40.08W, 12V, 3.34A; LPF-40-15 at 40.08W, 15V, 2.67A; LPF-40-20 at 40W, 20V, 2A; LPF-40-24 at 40.08W, 24V, 1.67A; LPF-40-30 at 40.2W, 30V, 1.34A; LPF-40-36 at 40.32W, 36V, 1.12A; LPF-40-42 at 40.32W, 42V, 0.96A; LPF-40-48 at 40.32W, 48V, 0.84A; and LPF-40-54 at 41.04W, 54V, 0.76A. The main selection difference is matching the output voltage and current rating to the load.

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Model	Power	Voltage	Current	IP Rating	Price
Mean Well LPF-40-24 Power Supply 40W 24V 1.67A	40.08W	24V	1.67A	IP67	$31.48	View
Mean Well LPF-40-20 Power Supply 40W 20V 2A	40W	20V	2A	IP67	$29.01	View
Mean Well LPF-40-42 Power Supply 40W 42V 960mA	40.32W	42V	0.96A	IP67	$29.01	View
Mean Well LPF-40-15 Power Supply 40W 15V 2.67A	40.08W	15V	2.67A	IP67	$29.01	View
Mean Well LPF-40-54 Power Supply 40W 54V 760mA	41.04W	54V	0.76A	IP67	$29.01	View

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