DIN-rail power supplies for 3-phase systems
24V, 20A

  • 3AC 380-480V Wide-range Input
  • Also Specified for 2-Phase Operation
  • Extra Long Lifetime
  • 95% Full Load and Excellent Partial Load Efficiencies  
  • Width only 65mm, Weight only 870g
  • 50% BonusPower®, 720W for up to 4s
  • Active Power Factor Correction PFC
  • Active Filtering of Input Transients
  • Full Power Between -25°C and +60°C
  • Extremely Low Input Inrush Current Surge
  • DC-OK Relay Contact
  • Quick-connect Spring-clamp Terminals
DC Output24-28Vdc
Input AC 380-480V  (± 15%)
Size (WxHxD)65 x 124 x 127mm
Product Status Stock item 
Technical Data

Input Data
AC-Input Voltage AC 380-480V  (± 15%)
DC-Input Voltage
EN61000-3-2(PFC-Norm) fulfilled
Harmonic Correctionactive
Power Factor0.94
Input Inrush Current Limitationactive
Peak turn on current3A/3A (J1)
External Input Fuse Recommendationmin. B-6A / C-3A

Output Data
Nominal Voltage24Vdc
Adjustment Range24-28V
Output Current Range20-17.5A
Output Current 17.5A at 28V
20A at 24V
Output Power480W
Power Reserves50% BonusPower®
max. Ripple and Noise Voltage100mVpp

Size (WxHxD)65mm x 124mm x 127mm
Weight per Piece (excluding packing)870g
Operat. Temperature Range-25°C ... +70°C
Derating12W/°C at >+60°C
Mounting Method DIN-Rail
Efficiency, typ.95.0%
Power Losses, typ.25.3W
MTBF SN 29500 @ 40°C (h)690.000h
Connection methodSpring-clamp terminals
DC-OK Signalyes
J1)3x400V, 50Hz/ 3x480Vac, 60Hz, independent of temperature
Commercial Information

Article NumberQT20.241
UPC Code875404000211
Country of originCN
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 bracketZM1.WALL
Side mounting bracketZM14.SIDE
Buffer moduleUF20.241
MOSFET redundancy moduleYR40.241