DIN-rail power supplies for 3-phase systems
48V, 20A

  • 380-480V Wide-range input and active PFC
  • Efficiency up to 95,4%
  • Negligibly low input inrush current
  • 50% Power reserves available up to 4s
  • Full output power between -25 and +60°C
  • DC-OK Contact; Shut-down Input
DC Output48-54Vdc
Input AC 380-480V  (-15%/+20%)
Size (WxHxD)110 x 124 x 127mm
Product Status Stock item 
Technical Data

Input Data
AC-Input Voltage AC 380-480V  (-15%/+20%)
DC-Input Voltage
EN61000-3-2(PFC-Norm) fulfilled
Harmonic Correctionactive
Power Factor0.88
Input Inrush Current Limitationactive
Peak turn on current4.5A/4.5A (J1)
External Input Fuse Recommendationmin. B-6A / C-6A

Output Data
nominal Voltage48Vdc
Adjustment Range48-54V
Output Current Range20-17.8A
Output Current 17.8A at 54V
20A at 48V
Output Power960W
Power Reserves50% BonusPower®
max. Ripple and Noise Voltage150mVpp

Size (WxHxD)110mm x 124mm x 127mm
Weight per Piece (excluding packing)1500g
Operat. Temperature Range-25°C ... +70°C
Derating24W/°C at >+60°C
Mounting Method DIN-Rail
Efficiency, typ.95.4%
Power Losses, typ.46.3W
MTBF SN 29500 @ 40°C (h)375.000h
Connection methodScrew terminals
DC-OK Signalyes
J1)3x400V, 50Hz/ 3x480Vac, 60Hz, independent of temperature
Commercial Information

Article NumberQT40.481
UPC Code875404001478
Country of originCZ
Product Status Stock item 
E ClassificationeClass 5.1 27049002
eClass 6.x 27049002
eClass 7.x 27049002
eClass 8.0 27049002
eClass 9.0 27040701
ETIM 4.0 EC000599
ETIM 5.0 EC002540
HS Code HS 85044082
Warranty Period (Month)36
Packaging Unit1pc
Accessories / Complementary Units

Wall / panel mount bracketZM2.WALL
Adapter for Siemens S7-300 railSLZ14
Diode redundancy moduleYR2.DIODE