CO3 and CO4 Series

High-voltage changeover unit for rail vehicles

Sensors and high-voltage controlgear

Schaltbau C03 and CO4 Series change-over units are designed for load-free switching of electrical loads. They are applied in rail vehicles which are used in cross-border service and are operated with different high-voltage power sources.

Required control signals are generated by the corresponding Schaltbau ZH1114 Series voltage selector .


  • Load-free adjustment of electrical configurations to different networks, e.g. various train line voltages in accordance with UIC 550
  • Suitable for all UIC voltages up to 5 kV DC max.
  • Inexpensive high-voltage switch for applications requiring high
    conventional thermal current
  • Various control programmes available in accordance with the
    requirements of the European railway companies
  • Simple adaptation of control programme to new requirements


CO3, CO4
Input voltage range to UIC 5500 ... 3,000 V AC, 16 2/3 ... 50 Hz; 0 ... 5,000 V DC
Conv. thermal current Ith70 A at 70 °C ambient temperature
Control voltage US24/110 V
Power dissipationapprox. 12 W during change-over, otherwise none
Ambient temperature range Tu-40 °C ... +85 °C
StandardsEN 50124, IEC 60077, IEC 61373, UIC 550
Show all data

By selecting this option you finish the configuration.


What do you want to do?

Do you have questions about this product?CO3, CO4 – High-voltage changeover unit for rail vehiclesElectrics for rolling stockDo you have questions about this product?
2035Bookmark product
What can we do for you?*

We gladly inform you about our current privacy policy.

Electrics for rolling stock
CO3, CO4 – High-voltage changeover unit for rail vehicles