E. Dold & Söhne GmbH & Co. KG

Tel.: +49 7723 654-0
E-Mail: dold-relays@dold.com

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E-Mail: ab@dold.com

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Reversing contactor

BH 9253


Nominal voltage

Rated continuous current

Switchover delay

Approvals and Markings


  • 0057946
  • BH9253.11 AC400V 12A 100MS
The reversing contactor BH 9253 is used to reverse the direction of 3-phase asynchronuos motors... more

Product description

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.

Technical specifications

Widths: 45, 67,5, 112,5 mm
Number of poles: 3-pole
Load current up to: 20 A
Load voltage up to: 3AC 24 - 480 V
On/Off Input Control: AC, AC/DC
Signalling output: Yes
Temperature monitoring: Yes
Approvals: UL
Enclosure design: Switch cabinet
Type: BH 9253


  • According to IEC/EN 60 947-1, IEC/EN 60 947-4-2
  • Switching at zero-crossing
  • To reverse 3 phase asynchronuos 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
  • 45 mm; 67.5 mm; 112.5 mm width