MEAN WELL Power Supply SDR-120 Series Single Output DIN Rail Mounted with PFC Function

Product Item : SDR-120 series
Category：DIN Rail Power Supplies
Wattage: 120W
Input Voltage: 88 ~ 264VAC or 124 ~ 370VDC
Output Current: 0 ~ 10A
Output Voltage: 12 ~ 48V
Product description：The Mean Well SDR-120 is a compact 120W DIN-rail power supply with high efficiency and universal AC input. It delivers reliable industrial performance with comprehensive circuit protection.
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SDR-120 Series - 120W DIN Rail Power Supply with Active PFC & 150% Peak Power

✓ In Stock 3-Year Warranty Active PFC 150% Peak DC OK Relay SEMI F47

				Key Performance at a Glance
			
						120W
					
						Rated Power
					
						180W
					
						Peak Power (3s)
					
						91%
					
						Max Efficiency
					
						PF>0.96
					
						Active PFC
					
						20ms
					
						Hold-up (115V/230V)
					
						40mm
					
						Width (Slim)

Product Overview

The SDR-120 series is the first SDR model to integrate Active PFC (PF>0.96@115Vac), delivering clean 120W output with 150% peak power (180W/3s) and a built-in DC OK relay for remote status monitoring. Purpose-built for industrial control equipment with UL508 listing, SEMI F47 voltage sag immunity, and BSMI certification.

The SDR-120 accepts 88~264Vac universal input (also 124~370Vdc). Available in three output voltages - 12V, 24V, and 48V - it delivers up to 10A at 12V and 2.5A at 48V with full 120W across all models. Efficiency peaks at 91% (24V), and the PFC stage maintains a solid 20ms hold-up time at both 115V and 230Vac — key for SEMI F47 voltage sag ride-through.

The DC OK relay contact (60Vdc/0.3A, 30Vdc/1A, 30Vac/0.5A resistive) enables direct PLC/SCADA integration for remote status monitoring — a first for the SDR series. Combined with Active PFC, 150% peak power, UL508, SEMI F47, and BSMI CNS15598-1 certification, the SDR-120 is the most feature-complete industrial DIN rail supply at 120W.

Product Images

Technical Specifications

Parameter	SDR-120-12	SDR-120-24	SDR-120-48
DC Output Voltage	12V	24V	48V
Rated Current	10A	5A	2.5A
Rated Power	120W	120W	120W
Peak Current (3s)	15A	7.5A	3.75A
Peak Power (3s)	180W	180W	180W
Ripple & Noise (max)	100mVp-p	100mVp-p	120mVp-p
Voltage Adjustment Range	12~14V	24~28V	48~55V
Voltage Accuracy	+/-1.0%	+/-1.0%	+/-1.0%
Line / Load Regulation	+/-0.5% / +/-1.0%	+/-0.5% / +/-1.0%	+/-0.5% / +/-1.0%
Efficiency (Typ.)	89%	91%	90.5%

Input Specifications (All Models)

Input Voltage Range	88~264Vac (universal); 124~370Vdc
Frequency Range	47~63Hz
Power Factor (Typ.)	PF>0.93/230Vac \| PF>0.96/115Vac (Active PFC, full load)
AC Current (Typ.)	1.4A / 115Vac \| 0.7A / 230Vac
Inrush Current (Typ.)	35A / 115Vac \| 70A / 230Vac (cold start)
Leakage Current	< 1mA / 240Vac
Start-up / Rise Time	1500ms/60ms/20ms @ 230Vac; 3000ms/60ms/20ms @ 115Vac (full load)
Hold-up Time (Typ.)	20ms / 230Vac \| 20ms / 115Vac (full load) — uniform at both voltages via PFC

Protection Features & Environmental Ratings

Overload Protection	110~150%: operates >3 sec then shutdown \| >150%: CC limiting for 3 sec then shutdown (restart to recover)
Overvoltage Protection	12V: 14~17V / 24V: 29~33V / 48V: 56~65V (shutdown output, restart to recover)
Over-temperature Protection	95C +/-5C (TSW, detects power switch heatsink); shutdown output, auto-recovery after temp drops
DC OK Relay Contact	60Vdc/0.3A, 30Vdc/1A, 30Vac/0.5A resistive — relay closes when power OK, opens on fault
Operating Temperature	-25~+70C (refer to derating curve; low Vin derating applies)
Operating Humidity	20~95% RH, non-condensing
Storage Temp / Humidity	-40~+85C, 10~95% RH
Temperature Coefficient	+/-0.03%/C (0~50C)
Vibration Resistance	10~500Hz, 2G, 10 min/cycle, X/Y/Z 60 min each; IEC60068-2-6
Altitude	Up to 2,000m; derate ambient temp by 3.5C/1,000m above
MTBF	>= 1,764.6K hrs (Telcordia SR-332); >= 292.1K hrs (MIL-HDBK-217F, 25C)
Dimensions	40 x 125.2 x 113.5 mm (WxHxD)
Net Weight / Packaging	0.67 kg / 20 pcs per carton / 14.4 kg / 1.0 CUFT

Safety Standards & Certifications

Safety Standards	UL508 (Industrial Control Equipment) \| TUV BS EN/EN62368-1 \| AS/NZS 62368.1 \| BSMI CNS15598-1 \| EAC TP TC 004 \| Meets BS EN/EN60204-1
SEMI F47	Certified — voltage sag immunity for semiconductor manufacturing
Withstand Voltage	I/P-O/P: 3KVac \| I/P-FG: 1.5KVac \| O/P-FG: 0.5KVac \| O/P-DC OK: 0.5KVac
Insulation Resistance	I/P-O/P, I/P-FG, O/P-FG: > 100Mohm / 500Vdc / 25C / 70% RH
EMC Emissions	BS EN/EN55032 (CISPR32) / BS EN/EN61204-3 - Class B \| CNS15936 Class B Harmonic: BS EN/EN61000-3-2 \| Flicker: BS EN/EN61000-3-3 \| EAC TP TC 020
EMC Immunity	BS EN/EN55035, BS EN/EN61000-6-2 (BS EN/EN50082-2), BS EN/EN61204-3 — Heavy Industrial EN61000-4-2,3,4,5,6,8,11 \| EAC TP TC 020 \| SEMI F47

Key Features

Active PFC (PF>0.96) + 20ms Hold-up
SDR's first PFC model: PF>0.96/115V with EN61000-3-2 compliance and 20ms uniform hold-up at both 115V and 230V

150% Peak: 180W for 3 Seconds
Delivers 180W peak power — starts motors, contactors, and capacitive loads without oversizing the supply

DC OK Relay Contact (First in SDR)
60Vdc/0.3A relay for direct PLC/SCADA status monitoring — relay closes on power OK, opens on fault

UL508 + BSMI + SEMI F47
North American industrial control + Taiwan BSMI + semiconductor voltage sag immunity — triple industrial certification

91% Efficiency (24V) with PFC
Excellent efficiency for a PFC-equipped industrial supply — reduces heat and energy costs in 24V control panels

Time-Adaptive Overload Protection
110~150% sustained operation >3s | >150% CC limiting 3s — maximizes uptime during motor starts and load surges

Frequently Asked Questions

What does the DC OK relay do on SDR-120?

The DC OK relay contact closes when the power supply output is normal and opens when a fault occurs (DC failure, overload, over-temperature, etc.). Rated at 60Vdc/0.3A or 30Vdc/1A/30Vac/0.5A resistive, it connects directly to PLC digital inputs for automated system monitoring — no external hardware needed. This is the first SDR model to include this feature.

How does SDR-120 compare to SDR-75?

SDR-120 adds: (1) Active PFC (PF>0.96 vs none), (2) DC OK relay (vs none), (3) 120W unified (vs 75W), (4) 20ms hold-up at both voltages (vs 80ms/20ms), (5) BSMI CNS15598-1 certification, (6) 40mm width (vs 32mm). The SDR-120 is the more feature-complete choice for PFC-required applications with remote monitoring needs.

Is the hold-up time really 20ms at both voltages?

Yes — this is a direct benefit of the Active PFC stage. The PFC boosts and stabilizes the internal DC bus, enabling 20ms hold-up at both 115Vac and 230Vac. This uniform hold-up is critical for SEMI F47 compliance and PLC brownout protection regardless of mains voltage.

Does SDR-120 support parallel operation?

No. The SDR-120 does not support parallel current sharing. For redundancy or higher total power, consider the XDR series with built-in parallel capability.

Related Products

All three models feature Active PFC, 150% peak power, DC OK relay, UL508, SEMI F47, BSMI, and Class B heavy industrial EMC in a 40mm slim DIN rail package.