CH715, CH815 – Contactors up to 3,000 V for rail

Single-pole NO contactors for AC and DC (unidirectional). Rated insulation voltage 3,000 V; conventional thermal current 50 A.

Contactor up to 3 kV DC and 1.5 kV AC with attached electric arc chamber and S800 snap-action switch as auxiliary contact.

The CH715 and CH815 series have been designed for a nominal switching capacity of 16 kW (AC and DC). They are used for the activation of power supply systems and as a main and auxiliary contact of heating registers in heating and air-conditioning systems. The electric arc is extinguished in the attached electric arc chamber.


Unidirectional switching of up to 3,000 V DC

The DC design boasts blowout magnets which drive the electric arc to the attached arcing chambers.

Switchgear in rail carriages
  • Activation contactor of power supply systems
  • Main and auxiliary contactor of heat registers in heating and air-conditioning systems
Auxiliary contact for CH815: Snap-action switch with positive opening operation

The design of the CH815 boasts an S800-series snap-action switch which reports the state of the main contacts reliably to the higher-level control system.

Ambient temperatures: –50°C to +70°C

Due to their approval for rail applications, the contactors can also be used in extreme temperatures.

By selecting this option you finish the configuration.



Type of voltageDC, AC
Main contacts, configuration1 x NO
Nominal voltage Un3 kV DC, 1.5 kV AC
Rated insulation voltage Ui3 kV
Test voltage at 50 Hz for 10 s10 kV
Rated switching capacity atU = 3,000 V DC5 A L/R = 1 ms
Rated switching capacity atU = 1,500 V AC 50 Hz10 A cos φ = 1.0
Switching cycles per hour(under rated load)120/h
Max. breaking capacity atU = 3,000 V DC30 A L/R = 0 ms
Conv. thermal current Ith50 A
Aux. contactCH815: 1 x SPDT
Coil voltage Us24, 36, 110, 120 V DC
Coil tolerance-30% ... +25%
IP rating (IEC 60529)IP00
Mechanical endurance1 million operating cycles
Temperature range-25 °C ... +70 °C
Storage temperature-40 °C ... +80 °C
Weightapprox. 3,300
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CH715, CH815 – 3 kV contactors