MEAN WELL Power Supply SDR-480 Series Single Output DIN Rail Mounted with PFC Function

Product Item : SDR-480 series
Category：DIN Rail Power Supplies
Wattage: 480W
Input Voltage: 90 ~ 264VAC or 127 ~ 370VDC
Output Current: 0 ~ 20A
Output Voltage: 24 ~ 48V
Product description：The MEAN WELL SDR-480 series DIN rail power supplies offer a high level of energy efficiency and low power dissipation.
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SDR-480 Series - 480W DIN Rail Power Supply with PFC & 150% Peak — SDR Flagship

✓ In Stock3-Year720W Peak94% EfficiencyDC OK Relay<0.8mA Leakage

				Key Performance at a Glance
			
						480W
					
						Rated Power
					
						720W
					
						Peak Power (3s)
					
						94%
					
						Efficiency (Unified)
					
						PF>0.99
					
						Active PFC (115V)
					
						<0.8mA
					
						Leakage Current
					
						85.5mm
					
						Width

Product Overview

The SDR-480 series is the largest and most powerful SDR model — a 480W DIN rail supply with Active PFC, 150% peak power (720W for 3s), built-in constant current limiting, and the lowest leakage current in the SDR family (<0.8mA). Designed for large industrial control panels, motor drive systems, and high-power factory automation.

The SDR-480 accepts 90~264Vac input (127~370Vdc) with Active PFC (PF>0.99@115V, PF>0.94@230V). Only two voltages: 24V/20A and 48V/10A, both delivering full 480W with 94% efficiency. The 720W peak for 3 seconds handles massive motor starts and contactor bank inrush. A key addition is the constant current limiting circuit for safe motor starting and battery charging applications.

The 8-pin output terminal provides dual +V, dual -V, relay contacts, and NC (normally closed) terminals for flexible field wiring. Leakage current of <0.8mA is the lowest in the SDR family — critical for medical-adjacent and sensitive electronic applications. Overload and OVP use auto-recovery, and the faster peak recovery cycle (50s at rated load vs 100s on SDR-240) enables more frequent peak power bursts. At 85.5x125.2x128.5mm and 1.6kg, the SDR-480 is the most capable SDR for demanding 480W-class applications.

Product Images

Technical Specifications

Parameter	SDR-480-24	SDR-480-48
DC Output Voltage	24V	48V
Rated Current	20A	10A
Rated Power	480W	480W
Peak Current (3s)	30A	15A
Peak Power (3s)	720W	720W
Ripple & Noise	100mVp-p	120mVp-p
Voltage Adj / Accuracy	24~28V / +/-1.2%	48~55V / +/-1.0%
Line / Load Regulation	+/-0.5% / +/-1.0%	+/-0.5% / +/-1.0%
Efficiency (Typ.)	94%	94%

Input Specifications (All Models)

Input Voltage	90~264Vac; 127~370Vdc
Power Factor (Typ.)	PF>0.94/230V \| PF>0.99/115V (Active PFC, full load)
AC Current / Inrush	5A/115V, 2.5A/230V \| 40A/115V, 80A/230V (cold start)
Leakage / Hold-up / Start-up	<0.8mA/240V \| 14ms/230V \| 1500ms/150ms @ 230V; 3000ms/150ms @ 115V
Peak Recovery	50s @ rated load → 150%/3s \| 15s @ 50% load → 150%/3s

Protection & Features

Overload	110~150%: >3s shutdown, auto-recovery \| >150%: 2s CC limiting, auto-recovery, 2s+ shutdown
OVP / OTP / SC	OVP: 29~33V(24V) / 56~65V(48V), auto-recovery or restart \| OTP: auto-recovery \| SC: auto-recovery
Constant Current Limiting	Built-in CC circuit — safe for motor starts, battery charging, and capacitive loads
DC OK Relay	60Vdc/0.3A, 30Vdc/1A, 30Vac/0.5A resistive; 8-pin terminal includes NC contacts (7,8)
Safety	UL508 \| TUV BS EN/EN62368-1 \| AS/NZS 62368.1 \| BSMI CNS15598-1 \| EAC TP TC 004 \| SEMI F47
Isolation / EMC	3KVac I/P-O/P, 2KVac I/P-FG \| Class B + EN61000-6-2 Heavy Industrial + CNS15936
Temp / MTBF / Dimensions	-25~+70C \| 964.2K hrs Telcordia \| 85.5 x 125.2 x 128.5 mm / 1.6 kg / 8pcs/carton

Key Features

480W + 720W Peak — SDR Flagship
Largest SDR with 150% peak power — 720W/3s starts massive motor drives and contactor banks without oversizing

Constant Current Limiting Built-In
Dedicated CC circuit for safe motor starting, battery charging, and capacitive load handling at 480W levels

<0.8mA Leakage — Lowest in SDR
Ultra-low leakage for medical-adjacent equipment, sensitive electronics, and applications requiring minimal ground current

94% Efficiency + PF>0.99
Near-unity PF with industry-leading 94% efficiency at 480W — minimal heat, energy cost, and grid stress

Fast 50s Peak Recovery
50s recovery vs 100s on SDR-240 — handles frequent motor start/stop cycles in production line applications

8-Pin Terminal + DC OK NC Contacts
Dual +V/-V + relay + NC contacts — flexible wiring for 480W industrial distribution and redundant monitoring

Frequently Asked Questions

Why is the hold-up time only 14ms on SDR-480?

At 480W output, the energy stored in the PFC bus capacitors is consumed faster. The 14ms hold-up is still adequate for SEMI F47 compliance and industrial brownout protection. For longer ride-through, consider adding external hold-up modules or using the SDR-240 (20ms) at lower power.

What does the constant current limiting circuit do?

Unlike standard hiccup or latch-off overload, the CC circuit limits output current to a safe maximum without shutting down — ideal for motor starts that draw high inrush, battery charging that requires controlled current, and capacitive loads. Combined with the time-adaptive overload, the SDR-480 handles a wider range of load types than standard DIN supplies.

Why is leakage current <0.8mA important?

Standard DIN rail supplies typically have <1-3.5mA leakage. The SDR-480's <0.8mA is exceptionally low — relevant for medical equipment (reduces patient leakage current), sensitive measurement instruments, and installations where multiple power supplies' cumulative leakage could trip GFCI/RCD breakers.