Name: MEAN WELL ERPF-400 series: enclosed constant-voltage power supply - ERPF-400-12
Brand: MEAN WELL
SKU: ERPF-400-12
Price: 87.24 USD
Availability: InStock

MEAN WELL ERPF-400 series: enclosed constant-voltage power supply - ERPF-400-12

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Description

ERPF-400-12 enclosed power supply

MEAN WELL ERPF-400-12 is a single-output enclosed AC/DC constant-voltage switching power supply for LED signage, channel letters and commercial displays. It provides 12 V DC with a catalog current range of 0–30 A and rated output power of 360 W. Universal AC input and active power factor correction are provided. Below 200 VAC, observe the 50% load limit.

Download MEAN WELL ERPF-400 Datasheet (PDF)

Catalog pages 11–14; series revision 2025-12-12.

Download MEAN WELL Enclosed-Type Installation Manual

Output and model selection

Parameter	Model-specific information
Model and output type	ERPF-400-12; ERPF-400 series; single-output constant-voltage AC/DC power supply. The final 12 code identifies the nominal output voltage.
Nominal DC output	12 V
Rated output current	30 A; operating current range 0–30 A.
Rated output power	360 W; voltage, current, power and derating limits must all be observed.
Output-voltage adjustment	10.8–13.2 V DC, via the +V ADJ control; keep output current and power within the model limits.
Ripple and noise	150 mVp-p maximum. Measured at 20 MHz bandwidth with a 12-inch twisted pair terminated in parallel 0.1 µF and 47 µF capacitors.
Voltage tolerance	±1.0%, including setup tolerance, line regulation and load regulation.
Line / load regulation	Line: ±0.5%; load: ±0.5%.
Setup / rise time	At full load: 2000 ms / 100 ms at 230 VAC; 3000 ms / 100 ms at 115 VAC.
Hold-up time	10 ms typical at 230 VAC and 10 ms typical at 115 VAC, at full load.

Input and loading

Parameter	Model-specific information
Input voltage	90–264 VAC; 127–370 VDC.
AC frequency	47–63 Hz.
Short-duration input withstand	300 VAC for 5 seconds, as stated in the catalog; this does not extend the continuous input-voltage range.
Power factor correction	Built-in active PFC; typical PF ≥0.95 at 230 VAC and ≥0.98 at 115 VAC.
Typical efficiency	89% under the catalog measurement conditions.
Typical AC current	2.5 A at 230 VAC; 3 A at 115 VAC.
Typical inrush current	Cold start: 45 A at 115 VAC; 90 A at 230 VAC.
Leakage current	Less than 1 mA at 240 VAC.
Input/load derating	At 60 Hz: 50% load from 90 VAC to below 200 VAC; the plotted limit steps to 100% at 200 VAC and remains 100% through 264 VAC. Also apply temperature derating.

Protection behavior

Parameter	Model-specific information
Short circuit	Constant-current limiting; recovers automatically after the fault is removed.
Overload	105–135% of rated output power. Constant-current limiting; recovers automatically after the fault is removed.
Overvoltage	13.8–16.2 V. Shuts down the output; re-power on to recover after correcting the fault.
Overtemperature	Shuts down the output; recovers automatically after the temperature falls.

Operating environment

Parameter	Model-specific information
Cooling and ambient temperature	Free-air convection; operating ambient −30 to +60°C, subject to derating.
Temperature/load derating	For the catalog VERTICAL installation: 100% load from −30 to +35°C, then follow the declining curve to 50% at +60°C. Do not treat the +60°C operating limit as a full-load rating.
Working humidity	20–90% RH, non-condensing.
Storage	−30 to +85°C; 10–95% RH.
Temperature coefficient	±0.1%/°C over 0–35°C.
Vibration	10–500 Hz, 3G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes.

Dimensions, wiring and installation

Parameter	Model-specific information
Enclosure	Aluminum case with a semi-potted interior designed to protect internal components against rain splash and dust. The catalog does not assign a numeric IP rating.
Dimensions	220.4 × 130 × 48 mm (L × W × H); mechanical drawing tolerance ±1 mm.
Mounting drawing	Case No. 230. The main case body length is 200 mm; the complete length above includes the mounting extension. The end mounting slot has a Ø8 mm circular entry and a 20.4 mm extension. Use the actual model drawing to lay out mounting points.
Terminal assignment	1 = AC/L; 2 = AC/N; 3 = FG (earth); 4–6 = DC output +V; 7–9 = DC output −V.
Mounting torque	The mechanical drawing specifies a maximum mounting torque of 8 kgf·cm.
Controls and indicator	+V ADJ output-voltage adjustment and a power-on LED indicator are located beside the terminal block; terminal pitch is 9.5 mm.
Installation orientation	Install upright in the catalog vertical position. Do not lean the unit forward or backward, and do not lay it flat.
Ventilation clearance	Keep at least 10 cm above, below, to the left and to the right, and retain the illustrated 5 cm clearance at the ventilation-hole side. Keep the ventilation openings unobstructed.
Unit mass	1100 g: catalog PACKING reference per unit (1.1 kg × 1000). This is not a measured shipment weight.

Installation manual requirements

Parameter	Model-specific information
Installation isolation	Disconnect the utility supply and prevent inadvertent reconnection before installation or maintenance. Have faults examined by a qualified technician; do not open the power-supply case yourself.
Mounting screws	Maintain adequate insulation between mounting screws and internal components. Confirm the permitted screw length and supplied mounting hardware with MEAN WELL before installation.
Ventilation and nearby heat sources	Keep ventilation openings unobstructed. Maintain 10–15 cm clearance when the adjacent device is a heat source, in addition to this model’s specified installation clearances.
Conductor and terminal installation	Select conductors for the actual current and temperature conditions. The installation manual requires each wire to carry no more than 80% of its suggested wire-table current when five or more wires are connected to the unit. Keep every strand inside its terminal and secure all terminal connections.
Protective earth and system verification	Connect AC/L to live, AC/N to neutral and FG to protective earth according to the model’s terminal diagram. Verify EMC again in the completed equipment.
Environment and load limits	Do not install the unit in high-moisture locations or near water, fire, or temperatures above its specified ambient limit. Keep output current and power within this model’s rated and derated limits.
Specified installation position	Install upright; forward tilt, backward tilt and flat mounting are not permitted. Keep at least 10 cm clearance above, below, left and right, and 5 cm at the ventilation-hole side.

Standards and catalog conditions

Parameter	Model-specific information
Safety standards	UL 60950-1, IEC/BS EN/EN 62368-1, GB 4943.1 and EAC TP TC 004 approved. IS 13252 (Part 1) also applies to this 12 V model.
Withstand voltage	Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC.
Isolation resistance	100 MΩ at 500 VDC, 25°C and 70% RH, for input–output, input–FG and output–FG.
EMC emission	Catalog compliance: BS EN/EN 55032 (CISPR 32), Class A; GB 17625.1; GB/T 9254.1; BS EN/EN 61000-3-2 and 61000-3-3; EAC TP TC 020.
EMC immunity	Catalog compliance: BS EN/EN 61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN 55035, light-industry level; EAC TP TC 020.
Final equipment EMC	Catalog EMC tests used a 450 × 450 mm metal plate, 1 mm thick. This supply is a component for final equipment; verify that the complete installation still meets the applicable EMC requirements.
MTBF	1981.2 thousand hours minimum, Telcordia SR-332 (Bellcore); 233.4 thousand hours minimum, MIL-HDBK-217F at 25°C.
Specification conditions	Unless otherwise stated, parameters are measured at 230 VAC input, rated load and 25°C ambient. Typical figures describe the stated conditions, not every operating point.
Factory and warranty statement	The manufacturer catalog states 100% full-load burn-in testing and a 3-year warranty. Warranty coverage is subject to the manufacturer’s applicable terms.