Name: MEAN WELL ERP-350 series: enclosed constant-voltage power supply - ERP-350-48
Brand: MEAN WELL
SKU: ERP-350-48
Price: 87.73 USD
Availability: InStock

MEAN WELL ERP-350 series: enclosed constant-voltage power supply - ERP-350-48

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Description

ERP-350-48 enclosed power supply

MEAN WELL ERP-350-48 is a single-output enclosed AC/DC constant-voltage switching power supply for LED signage, channel letters and commercial displays. It provides 48 V DC with a catalog current range of 0–7.3 A and rated output power of 350.4 W. Use the specified 180–264 VAC input range and the model-specific temperature and input derating curves.

Download MEAN WELL ERP-350 Datasheet (PDF)

Catalog pages 6–10; series revision 2025-12-12.

Download MEAN WELL Enclosed-Type Installation Manual

Output and model selection

Parameter	Model-specific information
Model and output type	ERP-350-48; ERP-350 series; single-output constant-voltage AC/DC power supply. The final 48 code identifies the nominal output voltage.
Nominal DC output	48 V
Rated output current	7.3 A; operating current range 0–7.3 A.
Rated output power	350.4 W; voltage, current, power and derating limits must all be observed.
Output-voltage adjustment	43.2–52.8 V DC, via the +V ADJ control; keep output current and power within the model limits.
Ripple and noise	240 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	1500 ms / 200 ms at 230 VAC.
Hold-up time	20 ms typical at 230 VAC.

Input and loading

Parameter	Model-specific information
Input voltage	180–264 VAC; 254–370 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.
Typical efficiency	90% under the catalog measurement conditions.
Typical AC current	4 A at 230 VAC.
Typical inrush current	90 A at 230 VAC.
Leakage current	Less than 1 mA at 240 VAC.
Input/load derating	At 60 Hz: 80% load at 180 VAC, rising along the plotted line to 100% at 200 VAC; 100% through 264 VAC. Also apply temperature derating.

Protection behavior

Parameter	Model-specific information
Short circuit	Short-circuit protection is listed in the series features; the specification table does not give a separate short-circuit recovery sequence.
Overload	120–160% of rated output power. Shuts down and latches the output off; re-power on to recover after correcting the fault.
Overvoltage	55.2–64.8 V. Shuts down and latches the output off; re-power on to recover after correcting the fault.
Overtemperature	Shuts down and latches the output off; re-power on to recover after correcting the overtemperature condition.

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 +40°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	±0.05%/°C over 0–50°C.
Vibration	10–500 Hz, 3G; 10 minutes per cycle, 60 minutes each along X, Y and Z axes.
Altitude derating	The catalog specifies an additional ambient-temperature derating of 3.5°C per 1000 m for this fanless design when operating above 2000 m.

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.
Outdoor location	For outdoor applications, install in a place with shelter as required by the model-specific installation page.
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.
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	900 g: catalog PACKING reference per unit (0.9 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. Outdoor installation requires a sheltered location.
Terminal screw guidance	The enclosed-type installation manual lists #6 terminal screws and a suggested torque of 8–10 for ERP-350, but that table does not print a torque unit. Confirm the unit and supplied terminal hardware with MEAN WELL before tightening.

Standards and catalog conditions

Parameter	Model-specific information
Safety standards	UL 62368-1, IEC 62368-1, GB 4943.1 and EAC TP TC 004 approved, as listed in the catalog.
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 reference basis: EN 55022 (CISPR 22), Class A; EAC TP TC 020.
EMC immunity	Catalog reference basis: EN 61000-4-5, light-industry level; EAC TP TC 020.
MTBF	2396.7 thousand hours minimum, Telcordia SR-332 (Bellcore); 321 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.