DIN-Rail Power Supplies for 1-phase Systems
24V, 20A

  • 200-240V Input
  • Efficiency up to 94,5%
  • Negligibly low input inrush current
  • 50% Power reserves available up to 4s
  • Full output power between -25 and +60°C
  • Quick-connect spring-clamp terminals

Output 24-28Vdc
Input AC 200-240V  (± 15%)
Size (WxHxD) 70 x 124 x 127mm
Weight 880g
Order information Stock Item 
Product Description
The most outstanding features of this DIMENSION Q-series DIN-rail power supply are the high efficiency and the small size, which are achieved by a synchronous rectification and further novel design details. The Q-series is part of the DIMENSION family, existing alongside the lower featured C-series. With short-term peak power capability of 150 % and built-in large sized output capacitors, these features help start motors, charge capacitors and absorb reverse energy, and often allow a unit of a lower wattage class to be used. High immunity to transients and power surges as well as low electromagnetic emission makes usage in nearly every environment possible. The integrated output power manager, a wide-range input voltage design and virtually no input inrush current make installation and usage simple. Diagnostics are easy due to the dry DC-OK contact, a green DC-OK LED and red overload LED. Unique quick-connect spring clamp terminals allow a safe and fast installation and a large international approval package for a variety of applications makes this unit suitable for nearly every situation.
Technical Data
Input Data
AC-Input Voltage AC 200-240V  (± 15%)
DC-Input Voltage
EN61000-3-2(PFC-Norm) not fulfilled
Power Factor0.5
Input Inrush Current Limitationactive
Peak turn on current40A
External Input Fuse Recommendationmin. B-10A / C-6A
Output Data
nominal Voltage 24Vdc
Adjustment Range 24-28V
Output Current Range 20-17A
Output Current 17A at 28V
20A at 24V
Output Power 480W
Power Reserves50% BonusPower®
max. Ripple and Noise Voltage100mVpp
Size (WxHxD) 70mm x 124mm x 127mm
Weight per Piece (excluding packing) 880g
Operat. Temperature Range-25°C ... +70°C
Derating12W/° at >+60°C
Mounting Method DIN-Rail
Efficency, typ.94.5%
Power Losses, typ.28.3W
MTBF SN 29500 @ 40°C (h)577.000h
Connection methodSpring-clamp terminals
DC-OK Signalyes
V1) Peak current at 230Vac, independent of temperature
Commercial Information
Article Number QS20.244
UPC Code 875404001317
Country of origin CZ
Order information Stock Item 
E Classification eClass 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 Unit 1pc
Accessories / Complementary Units
Wall/Panel Mount Bracket ZM1.WALL
Adapter for Siemens S7-300 Rail SLZ13
MOSFET redundancy module YR40.242
DC-UPS Control Unit UB20.241