The MEAN WELL ERP-350-48 is a 48 V, 7.3 A enclosed AC/DC power supply with a catalogue rated output of 350.4 W. Its aluminium case and semi-potted interior are designed against rain splash for LED signs and displays. It requires 180-264 VAC or 254-370 VDC input. Install it upright with the specified ventilation clearances.
Product Datasheet
Download MEAN WELL ERP-350 Datasheet (PDF)
The ERP-350 section is on PDF pages 18, 19, 20, 21, 22. Refer to the complete mechanical drawings and notes when planning installation.
Model and Output Ratings
| Full model |
ERP-350-48 |
| Series |
ERP-350 |
| Output voltage code |
48 V version |
| DC output voltage |
48 V |
| Rated output current |
7.3 A |
| Rated output power |
350.4 W |
| Output current range |
0-7.3 A |
| Output voltage adjustment |
43.2-52.8 V |
| Maximum ripple and noise |
240 mVp-p |
| Voltage tolerance |
±1.0% |
| Line regulation |
±0.5% |
| Load regulation |
±0.5% |
Keep the output within both its current and rated-power limits after voltage adjustment. Voltage tolerance includes set-up tolerance, line regulation and load regulation.
Input and Electrical Performance
| Input voltage |
180-264 VAC; 254-370 VDC |
| Input frequency |
47-63 Hz |
| Temporary surge-input withstand |
300 VAC for 5 seconds |
| Typical efficiency |
90% |
| Typical AC input current |
4 A at 230 VAC |
| Typical inrush current |
90 A at 230 VAC |
| Leakage current |
<1 mA at 240 VAC |
| Set-up / rise time |
1500 / 200 ms at 230 VAC |
| Typical hold-up time |
20 ms at 230 VAC |
Unless otherwise stated, specifications are measured at 230 VAC input, rated load and 25°C ambient. Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with parallel 0.1 µF and 47 µF capacitors.
Protection
| Short-circuit protection |
Listed in the catalogue feature set |
| Overload threshold |
120-160% of rated output power |
| Overload recovery |
Output shutdown and latch-off; reapply input power to recover |
| Overvoltage threshold |
55.2-64.8 V |
| Overvoltage recovery |
Output shutdown and latch-off; reapply input power to recover |
| Overtemperature protection |
Output shutdown and latch-off; reapply input power to recover |
Cooling and Operating Limits
| Cooling |
Free-air convection; fanless |
| Working temperature |
-30 to +60°C, subject to derating |
| Temperature load curve, vertical orientation |
100% through 40°C; reduce linearly to 50% at 60°C |
| Input-voltage load curve, 60 Hz |
80% at 180 VAC; rises to 100% at 200 VAC; 100% at 200-264 VAC |
| Working humidity |
20-90% RH, non-condensing |
| Storage conditions |
-30 to +85°C; 10-95% RH |
| Temperature coefficient |
±0.05%/°C over 0-50°C |
| Vibration |
10-500 Hz, 3 G; 10 minutes/cycle, 60 minutes on each X/Y/Z axis |
Apply the temperature and input-voltage limits together. Full rated output is not available throughout the entire input and temperature ranges.
For operation above 2000 m, reduce the allowable ambient temperature by 3.5°C per additional 1000 m, as specified for fanless models.
Mechanical Installation and Connections
| Overall dimensions, L × W × H |
220.4 × 130 × 48 mm |
| Case drawing |
230; dimensional tolerance ±1 mm |
| Installation orientation |
Upright and vertical; do not tilt forwards/backwards or lay flat |
| Ventilation clearance |
10 cm above, below, left and right; 5 cm on the ventilation-hole side |
| Input terminal pins |
1: AC/L; 2: AC/N; 3: FG / protective earth |
| DC output terminal pins |
4-6: -V; 7-9: +V |
| Mounting-slot detail |
Ø8 mm, as shown in the mechanical drawing |
| Adjustment and indication |
+V ADJ control and LED power-on indicator |
For outdoor use, install the supply in a sheltered location as required by the catalogue. Keep the ventilation openings clear.
Use the exact model drawing for terminal polarity and mounting; similar enclosures do not establish identical pin assignments. The rain-splash design is not a specification for immersion.
Safety and EMC
| Catalogue-approved safety standards |
UL 62368-1; IEC 62368-1; GB 4943.1; EAC TP TC 004 |
| 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, between input-output, input-FG and output-FG |
| EMC emission |
EN 55022 (CISPR 22), Class A; EAC TP TC 020 (catalogue reference) |
| EMC immunity |
EN 61000-4-5, light-industry level; EAC TP TC 020 (catalogue reference) |
Verify the completed equipment and installation against applicable safety and EMC requirements.
Weight and Reliability
| Mass, catalogue PACKING reference per unit |
900 g |
| Catalogue packing |
0.9 kg; 9 units / 11 kg / 0.63 CUFT |
| Minimum MTBF, Telcordia / MIL-HDBK-217F |
2396.7K / 321K hours |
| Manufacturer datasheet warranty reference |
3 years |
| Factory test |
100% full-load burn-in |
MTBF references are Telcordia SR-332 (Bellcore) and MIL-HDBK-217F at 25°C, respectively. The per-unit catalogue packing mass is a reference, not a measured shipping weight.
