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.


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