BH 9253

Reversing Contactor


The reversing contactor BH 9253 is used to reverse the direction of 3-phase asynchronuos motors by switching 2 phases. An electrical interlocking disables the control of both directions at the same time. The reversing contactor has a short on and off delay time. When reversing the phases a switchover delay is guaranteed. To protect the power semiconductors the unit incorporates temperature monitoring. When overtemperature is detected the power semiconductors swith off and an output relay as well as a red LED is activated. This state is stored. When the temperature is back to normal the semiconductors can be activated again by switching off and on the control voltage.


  • According to IEC/EN 60 947-1, IEC/EN 60 947-4-2
  • Switching at zero-crossing
  • To reverse 3 phase asynchronous motors up to
    5.5 kW / 400 V (7.5 HP / 460 V)
  • Electrical interlocking of both directions
  • Temperature monitoring to protect the power semiconductors
  • Measured nominal current up to 20 A
  • LEDs for status indication
  • Galvanic separation between control circuit and power circuit


Width x Height x Depth:

112.5 x 67.5 x 45 mm

Technical Specifications

Model Product Number Switch Delay Switching Capacity Protection Degree
DOLD Reversing Contactors BH 9253 On: Max. 30 msOff: Typically 25 ms

Switch-over: 100 ms

At AC 15:NO: 3 A / AC 230 V (IEC/EN 60 947-5-1)

NC: 1 A / AC 230 V (IEC/EN 60 947-5-1)

Housing: IP 40 (IEC/EN 60 529)

Terminals: IP 20 (IEC/EN 60 529)