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Mean Well ERPF-400-12 Switching Power Supply 400W 12V 30A

high efficiency up to 91%design against rain splashlow cost and high reliability

SKU ERPF-400-12

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Overview

ERPF-400-12 is the 12V output model of this series: rated current 30A, rated power 360W, typical efficiency 89%.

ERPF-400 series is a 400W single output enclosed type AC/DC power supply with the active PFC design. It adopts a aluminum case and the interior is semi-potted, protecting the internal electronic components from rain splash and dust. With the complete protection functions, ERPF-400 is suitable for the applications such as outdoor LED channel letters, commercial display, etc.

Features

Universal AC input / Full range (Withstand 300VAC surge input for 5 seconds)
Built-in active PFC function
High efficiency up to 91%
Design against rain splash
Protections: Short circuit / Overload / Over voltage/ Over temperature
Cooling by free air convection
LED indicator for power on
Low cost, high reliability
100% full load burn-in test
3 years warranty

Specifications

ERPF-400-12Specifications from the official datasheet (2025-12-12 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 30A
CURRENT RANGE^Note.5: 0 ~ 30A
RATED POWER: 360W
RIPPLE & NOISE (max.)^Note.2: 150mVp-p
VOLTAGE ADJ. RANGE: 10.8 ~ 13.2V
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 2000ms, 100ms/230VAC; 3000ms, 100ms/115VAC at full load
HOLD UP TIME (Typ.): 10ms/230VAC; 10ms/115VAC at full load

INPUT

VOLTAGE RANGE^Note.4: 90 ~ 264VAC 127 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF≧0.95/230VAC, PF≧0.98/115VAC
EFFICIENCY (Typ.): 89%
AC CURRENT (Typ.): 2.5A/230VAC 3A/115VAC
INRUSH CURRENT (Typ.): cold start 45A/115VAC, 90A/230VAC
LEAKAGE CURRENT: <1mA / 240VAC

PROTECTION

OVER LOAD: 105 ~ 135% rated output power Protection type : Constant current limiting, recovers automatically after fault condition is removed
SHORT CIRCUIT: Protection type : Constant current limiting, recovers automatically after fault condition is removed
OVER VOLTAGE: 13.8 ~ 16.2V Protection type :Shut down O/P voltage, re-power on to recover
OVER TEMPERATURE: Shut down O/P voltage, recovers automatically after temperature goes down

ENVIRONMENT

WORKING TEMP.: -30 ~ +60℃ (Refer to output load derating curve)
WORKING HUMIDITY: 20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -30 ~ +85℃, 10 ~ 95% RH
TEMP. COEFFICIENT: ±0.1%/℃ (0 ~ 35℃ )
VIBRATION: 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC (Note.6)

SAFETY STANDARDS: UL60950-1,IEC/BS EN/EN62368-1, GB 4943.1, EAC TP TC 004, IS13252(Part1)(for 12,24 only) approved
WITHSTAND VOLTAGE: I/P-O/P:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
ISOLATION RESISTANCE: I/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC / 25℃/ 70% RH
EMC EMISSION: Compliance to BS EN/EN55032 (CISPR32) class A, GB17625.1,GB/T 9254.1; BS EN/EN61000-3-2; BS EN/EN61000-3-3, EAC TP TC 020
EMC IMMUNITY: Compliance to BS EN/EN61000-4-2,3,4,5,6,8,11, BS EN/EN55035; light industry level, EAC TP TC 020

OTHERS

MTBF: 1981.2K hrs min. Telcordia SR-332 (Bellcore) 233.4Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 220.4*130*48mm (L*W*H)
PACKING: 1.1Kg; 9pcs / 11Kg / 0.63CUFT

Test conditions and notes6

1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltages. Please check the static characteristics for more details.
5. Please refer to “Static Characteristics".
6. The power supply is considered a component which will be installed into a final equipment. All the EMC tests are been executed by mounting the unit on a 450mm*450mm metal plate with 1mm of thickness. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf)

Technical drawings

ERPF-400-12 Mechanical Specification — Mechanical Specification

ERPF-400-12 Block Diagram — Block Diagram

ERPF-400-12 Derating Curve — Derating Curve

Typical applications

LED decoration/signage
LED channel letters
LED display

Downloads

Catalogues2

Mean Well Catalog (Industrial) PDF Download

Mean Well Inverter Catalog PDF Download

FAQ

What is the Mean Well ERPF-400-12 used for?

The ERPF-400-12 is a 12V enclosed switching power supply designed for higher-power DC applications that need up to 30A output. It is commonly considered for security, control, and other commercial or industrial systems where a robust enclosed AC-DC supply is required.

What are the main output specifications of the ERPF-400-12?

This model provides a 12V DC output with a rated current of 30A. The listed product data shows a 360W power rating, while the product name identifies it as part of the 400W ERPF series. Buyers should use the model-specific published rating shown on the product page when matching load requirements.

What input range does the Mean Well ERPF-400-12 support?

The ERPF-400-12 supports universal input from 90 to 264VAC and also accepts 127 to 370VDC input. Its specification also notes that derating may be needed under low input voltages.

Does the ERPF-400-12 include built-in protection features?

Yes, this power supply includes short circuit, overload, over voltage, and over temperature protection. The specifications state automatic recovery after fault removal for short circuit and overload conditions, while over-voltage protection requires re-powering to recover.

Can the ERPF-400-12 be used in demanding environmental conditions?

This model is rated for operation from -30°C to +60°C, subject to the output load derating curve. It is specified for 20 to 90% RH non-condensing humidity and 3G vibration (10 to 500Hz), which can be useful in enclosed equipment environments where reliability matters.

What efficiency and power quality features does this model offer?

The ERPF-400-12 is specified with a typical efficiency of 89%. It also includes a PFC circuit with a typical power factor of ≥0.95 at 230VAC, which is a useful feature for buyers evaluating power quality and input performance in commercial or industrial applications.

What certifications come with the Mean Well ERPF-400-12?

The listed safety approvals include UL60950-1, IEC/BS EN/EN62368-1, GB 4943.1, EAC TP TC 004, and IS13252(Part1) for 12V and 24V versions. EMC emission complies with BS EN/EN55032 (CISPR32) class A.

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Model	Power	Voltage	Current
Mean Well ERPF-400-48 Switching Power Supply 400W 48V 8.3A	398.4W	48V	8.3A	View
Mean Well ERPF-400-24 Switching Power Supply 400W 24V 16.7A	400.8W	24V	16.7A	View

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