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Mean Well ERP-350-48 Switching Power Supply 350W 48V 7.3A

design against rain splashfanless designeconomical

SKU ERP-350-48

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Overview

ERP-350-48 is the 48V output model of this series: rated current 7.3A, rated power 350.4W, typical efficiency 90%.

ERP-350 series is a 350W single output enclosed type AC/DC power supply . It adopts an aluminum case and the interior is semi-potted, protecting the internal electronic components from rain splash and dust. With the complete protection functions, ERP-350 is suitable for the applications such as outdoor LED channel letters, commercial display , etc.

Features

AC input 180~264VAC
Withstand 300VAC surge input for 5 seconds
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

ERP-350-48Specifications from the official datasheet (2025-12-12 edition)

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 7.3A
CURRENT RANGE: 0 ~ 7.3A
RATED POWER: 350.4W
RIPPLE & NOISE (max.)^Note.2: 240mVp-p
VOLTAGE ADJ. RANGE: 43.2 ~ 52.8V
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±0.5%
SETUP, RISE TIME: 1500ms, 200ms/230VAC
HOLD UP TIME (Typ.): 20ms/230VAC

INPUT

VOLTAGE RANGE: 180 ~ 264VAC 254 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 90%
AC CURRENT (Typ.): 4A/230VAC
INRUSH CURRENT (Typ.): 90A/230VAC
LEAKAGE CURRENT: <1mA / 240VAC

PROTECTION

OVER LOAD: 120 ~ 160% rated output power 12-36V Hiccup mode, recovers automatically after fault condition is removed 48V Shut down and latch off o/p voltage, re-power on to recover
OVER VOLTAGE: 55.2 ~ 64.8V 12-36V Hiccup mode, recovers automatically after fault condition is removed 48V Shut down and latch off o/p voltage, re-power on to recover
OVER TEMPERATURE: 12-36V Shut down O/P voltage, recovers automatically after temperature goes down 48V Shut down and latch off o/p voltage, re-power on to recover

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: ±0.05%/℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: UL 62368-1,IEC 62368-1,GB 4943.1,EAC TP TC 004 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: Refer to EN55022 (CISPR22) class A, EAC TP TC 020
EMC IMMUNITY: Refer to EN61000-4-5;light industry level, EAC TP TC 020

OTHERS

MTBF: 2396.7K hrs min. Telcordia SR-332 (Bellcore) 321Khrs min. MIL-HDBK-217F (25℃)
DIMENSION: 220.4*130*48mm (L*W*H)
PACKING: 0.9Kg; 9 pcs/11Kg/0.63CUFT

Test conditions and notes4

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. 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).

Technical drawings

ERP-350-48 Block Diagram — Block Diagram

ERP-350-48 Mechanical Specification — Mechanical Specification

Typical applications

LED decoration/signage
LED channel letters
LED display

Downloads

Datasheet1

ERP-350-48 datasheetERP-350-SPEC.PDF · 2025-12-12 edition PDF Download

Certificates3

EMC Certificate (ELG-75)(EN) PDF Download

UL Certificate (ERP-350)(EN) PDF Download

CB Certificate (ERP-350)(EN) PDF Download

Test reports1

Test Report (ERP-350-48)(EN) PDF Download

FAQ

Can I use the ERP-350-48 for 48V industrial automation equipment?

Yes, this unit is a 48V constant voltage power supply rated for 350W and 7.3A, which makes it suitable for 48V automation equipment designed for that DC bus. It should be matched only to loads that require constant 48V output and stay within the 7.3A and 350W limits.

Is the ERP-350-48 a good fit for 48V control systems or industrial communication hardware?

It can be used where the equipment requires a regulated 48V constant voltage supply and the total load is within 350W and 7.3A. Note that on the 48V model, overload, over-voltage and over-temperature protection shut down and latch off the output, and the input must be re-powered to recover.

Can this power supply run 48V embedded or OEM electronics?

Yes, it is intended for 48V DC applications that need constant voltage output rather than constant current operation. The unit provides 48V at up to 7.3A with 350W total power, so it fits OEM or embedded systems designed around those ratings.

Would the ERP-350-48 work for 48V industrial test or monitoring systems?

It is suitable for 48V test, monitoring, or process-control systems that need a stable constant voltage source. The 180-264VAC input range supports operation from AC mains in that range while delivering up to 48V, 7.3A, and 350W on the output side.

What are the differences between the ERP-350-48 and the other ERP siblings listed here?

ERP-350-48 is the 350.4W, 48V, 7.3A model in the ERP-350 series. The other models are ERP-350-12 at 320.4W, 12V, 26.7A; ERP-350-24 at 350.4W, 24V, 14.6A; and ERP-350-36 at 349.2W, 36V, 9.7A.

Is the ERP-350-48 appropriate for indoor areas with temperature swings or occasional moisture exposure?

It is specified for operation from -30°C to +60°C (with output load derating), which supports use in environments with a broad temperature range. The datasheet states it is designed for outdoor application but should be installed in a sheltered place, and no IP rating is provided, so it is not defined as a fully weatherproof power supply.

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Model	Power	Voltage	Current
Mean Well ERP-350-36 Switching Power Supply 350W 36V 9.7A	349.2W	36V	9.7A	View
Mean Well ERP-350-24 Switching Power Supply 350W 24V 14.6A	350.4W	24V	14.6A	View
Mean Well ERP-350-12 Switching Power Supply 350W 12V 26.7A	320.4W	12V	26.7A	View

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