MEAN WELL SDR-480P-48 is a convection-cooled industrial DIN rail power supply rated at 48 V DC, 10 A and 480 W. It includes active PFC, adjustable output, a DC OK relay and current sharing. Its 150% peak capability is limited to 3 seconds; average output power must remain within 480 W and all input-voltage and temperature limits apply.
Product Datasheet
Download MEAN WELL SDR-480P Datasheet (PDF)
The SDR-480P section is on PDF pages 13, 14, 15. Refer to the complete mechanical drawings and notes when planning installation.
Model Identification
| Complete model |
SDR-480P-48 |
| SDR-480P family |
480 W family with the P current-sharing designation; retain the complete SDR-480P code. |
| 48 output code |
48 V nominal DC output. |
| Construction |
Active PFC, free-air convection, constant-current limiting, adjustable DC output and DC OK indication/contact. No fan is required by the stated cooling method. |
DC Output
| Nominal output |
48 V DC; 10 A rated, current range 0–10 A; 480 W rated power. |
| Peak output |
15 A / 720 W (150% of rated power), for no more than 3 seconds; average output power must not exceed 480 W. |
| Output-voltage adjustment |
48–55 V DC using +V ADJ. Stay within rated current and power when adjusting. |
| Ripple and noise, maximum |
120 mVp-p. |
| Voltage tolerance |
±1.0%, including setup tolerance, line regulation and load regulation. |
| Line / load regulation |
±0.5% / ±1.0%. |
| Efficiency, typical |
94% under the stated catalogue reference conditions. |
Ripple and noise are measured with 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF parallel capacitors.
Input and Starting
| AC input |
90–264 VAC, full range. |
| DC input |
127–370 VDC. |
| Frequency |
47–63 Hz. |
| Power factor, typical |
0.94 at 230 VAC and 0.99 at 115 VAC, at full load. |
| AC input current, typical |
5 A at 115 VAC; 2.5 A at 230 VAC. |
| Inrush current, typical |
40 A at 115 VAC; 80 A at 230 VAC. |
| Setup / rise time |
1500 / 150 ms at 230 VAC; 3000 / 150 ms at 115 VAC, at full load. |
| Hold-up time, typical |
14 ms at 230 VAC, at full load. |
| Leakage current |
Less than 0.6 mA at 240 VAC. |
Protection and DC OK Relay
| Short circuit / overload |
At 110–150% of rated output power, the specification describes operation for more than 3 seconds followed by output shutdown with automatic recovery. Above 150%, constant-current limiting provides automatic recovery within 2 seconds; a condition persisting beyond 2 seconds may cause shutdown. |
| Overvoltage |
56–65 V; output shutdown with automatic recovery or re-power to recover. |
| Overtemperature |
105 ±5°C at the power-switch heatsink TSW, not an ambient-temperature rating. Output shutdown; automatic recovery after temperature falls. |
| DC OK closed / open |
Closed: PSU on / DC OK. Open: PSU off / DC fail. |
| Relay contact limits |
Resistive load: 60 VDC / 0.3 A, 30 VDC / 1 A or 30 VAC / 0.5 A. Use these voltage/current combinations; the function table also identifies the 30 V / 1 A resistive reference. |
The overload response is protective behavior, not permission to extend the 3-second peak limit. The relay is a contact output; no numeric DC OK trip threshold or logic-output voltage is specified here.
Peak Loading and Derating
| Repeated peak loading |
Limit each peak to 3 seconds and keep the complete-cycle average at or below 480 W. No universal fixed duty-cycle percentage is specified; the permitted duty depends on the intervening load and all derating limits. |
| Lower-baseline waveform example |
The second catalogue waveform shows 240 W for 15 seconds and 720 W for 3 seconds. Apply the separate average-power limit; this example does not authorize a longer peak. |
| Vertical continuous-load curve |
At 230 VAC: 100% from -25°C to 60°C, then reduce to 80% at 70°C. At 100 VAC, reduction starts at 55°C and reaches 80% at 70°C. |
| Vertical peak-load curve |
The 3-second curve is 150% through 60°C and declines to 120% at 70°C. |
| Input-voltage curve, 60 Hz |
90% load at 90 VAC, rising to 100% at 100 VAC; 100% continues to 264 VAC. |
Do not superimpose indefinitely repeated boosts on a continuous rated-power load: lower-load intervals are needed to meet the stated average-power limit. Apply temperature and input-voltage limits together.
Parallel Current Sharing
| Maximum units |
8 units; consult the manufacturer for other configurations. |
| Output-voltage matching |
The difference between outputs must be less than 0.2 V. |
| Maximum total load current |
10 A × number of units × 0.9. With 8 units this gives 72 A before any other required derating; the unadjusted sum of nameplate powers is not the continuous load allowance. |
| Minimum parallel load |
Greater than 3% × rated current per unit × number of units. |
| Sharing connections |
Connect all P+ terminals together and all P- terminals together, with the DC outputs connected in parallel as shown. On TB2, P+ is pin 7 and P- is pin 8. |
Environment and Installation Clearances
| Cooling / operating temperature |
Free-air convection; -25 to +70°C, subject to the vertical derating curves. |
| Humidity / storage |
Working: 20–95% RH, non-condensing. Storage: -40 to +85°C, 10–95% RH. |
| Temperature coefficient |
±0.03%/°C over 0–50°C. |
| Vibration |
Component: 10–500 Hz, 2 G, 10 minutes per cycle and 60 minutes along each X, Y and Z axis. Mounting complies with IEC60068-2-6. |
| Installation clearances |
For permanent full-power loading, the catalogue recommends 40 mm above, 20 mm below and 5 mm on each side. Allow 15 mm next to a device that is a heat source. |
| Altitude derating note |
For this fanless supply, reduce allowable ambient temperature by 3.5°C per additional 1000 m above 2000 m (6500 ft). No maximum operating altitude is specified by this note. |
Dimensions, Terminals and Accessories
| Dimensions / case |
85.5 × 125.2 × 128.5 mm (W × H × D); case 984A, mechanical drawing tolerance ±1 mm. |
| DIN rail |
TS-35/7.5 or TS-35/15; the drawing shows a 35 mm rail profile. |
| AC input TB1 |
Pin 1: FG protective earth; pin 2: AC/N; pin 3: AC/L. |
| DC output TB2 |
Pins 1–2: +V; pins 3–4: -V; pins 5–6: DC OK relay; pin 7: P+; pin 8: P-. |
| Adjustment / indication |
The mechanical drawing identifies +V ADJ and the DC OK indicator. Follow the complete drawing and the unit markings for wiring and installation. |
No separately orderable terminal or connector accessory code is listed for this model; do not assume a DIN rail or additional wiring kit is included.
Safety, Insulation and EMC
| Catalogue-listed safety |
UL508; TUV BS EN/EN62368-1; AS/NZS62368.1; EAC TP TC004; BSMI CNS15598-1. |
| Withstand voltage |
Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC; output–DC OK: 0.5 kVAC. |
| Insulation resistance |
More than 100 MΩ for input–output, input–FG and output–FG at 500 VDC, 25°C and 70% RH. |
| Emissions |
BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC020; CNS15936. |
| Immunity |
BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035; BS EN/EN61000-6-2 (BS EN/EN50082-2); BS EN/EN61204-3, heavy-industry level; EAC TP TC020. SEMI F47 approval is listed. |
This supply is a component for installation in final equipment. Reconfirm compliance of the completed equipment with the applicable EMC directives.
Weight, Reliability and Reference Conditions
| Catalogue unit weight |
1600 g, converted from the explicit 1.6 kg PACKING reference per unit; not a measured net weight, shipping weight or a carton-weight average. |
| MTBF |
969.8 K hours minimum, Telcordia SR-332 (Bellcore); 118.6 K hours minimum, MIL-HDBK-217F at 25°C. These are reliability references, not guaranteed service life. |
| Manufacturer statements |
100% full-load burn-in test and a three-year warranty are listed in the catalogue; applicable manufacturer terms govern warranty coverage. |
| Default test conditions |
Unless otherwise specified: 230 VAC input, rated load and 25°C ambient. |
| Datasheet revision |
SDR-480P-SPEC, 2025-02-17; combined SDR catalogue pages 13–15. |
