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DC-DC converter 110/24 V dc

110/24 V DC, 4,2A

  • Width 40 mm
  • 91,1 % efficiency
  • Acc. to EN 50155 railway application standard
  • 50% bonuspower for 4 seconds
  • Conformal coated PC-boards

Product description

The QS5.241-60 DC/DC converter is designed specifically for railway & transportation applications. It is approved according to the EN 50155 standard, which is an international standard covering electronic equipment used on rolling stock for railway applications. The standard covers aspects such as temperature, humidity, shock, vibration, EMI and other parameters. Because of these requirements, the unit is equipped with conformal coated pc-boards.


The unit features a DC-OK signal contact for remote monitoring, and quick-connect spring-clamp terminals for a reliable connection even when mechanical vibration and shock are involved. The unit also covers an extreme wide temperature range from -25°C up to +70°C with full output current.


This DC/DC converter comes in a very compact housing and requires only 40mm space on the DIN-rail due to the high efficiency and low power losses. The high efficiency is achieved by utilizing cutting edge technology and other unique design techniques.


PSU 110V dc I/P 24V dc 4.2A 100W O/P Railway Compliant

Technical data

Input data

Input voltage dc 110 V
Input voltage dc min 77 V DC
Input voltage dc max 154 V DC
Inrush current Typ. 10 A @ 110 V DC
Max entrance tripple 15 V pp

Output data

Output voltage 24 V DC
Output voltage min 24 V DC
Output voltage max 28 V DC
Output current 4,2 A
Power 100 W

Efficiency / Lifetime / MTBF

Efficiency 91,1 %
Life span 127000 h @ 24 V DC, 4,2 A, 40 °C
MTBF (IEC 61709) 127000 h @ 24 V DC, 4,2 A, 40 °C


Width 40 mm
Height 124 mm
Depth 117 mm
Weight 0,64 kg


Approvals CE, EAC, EN 50155
Keep time Typ. 42 ms @ 4,2 A
IP class IP20
Clamp type Spring-clamp
Material protection Aluminium
Ripple max 50 mV pp
Series Dimension Q
Temperature min without derating -25 °C
Temperature max without derating 60 °C
Conformal coated Yes
DC relay output Yes


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