Thermomagnetic device circuit breakers

Protection in the event of overload and short circuit

Protection in the event of overload and short circuit

Always the right choice – whether high starting currents, long cable paths or remote signaling of the operating state.

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Our thermomagnetic device circuit breakers are used in information, communication, and process technology. Due to the various tripping characteristics, the device circuit breakers can be used in diverse applications. Integrated remote signaling enables you to permanently monitor the operating state of your system.

Your advantages

  • Maximum overcurrent protection over long cable paths, thanks to SFB tripping characteristic
  • Integration in remote signaling concepts, thanks to integrated changeover contact
  • Reduced installation costs, due to bridgeable device circuit breakers (in the base element)
  • Protection of 230/240 V AC control voltages, thanks to the M1 characteristic curve

Function and design

CB TM thermomagnetic device circuit breaker  

Thermomagnetic device circuit breakers with push-in connection technology

Thermomagnetic device circuit breakers are triggered both thermally and magnetically. The two systems, bimetal and solenoid, operate independently of one another.

This means that in the event of a short circuit, thermomagnetic device circuit breakers trip faster than thermal device circuit breakers.

Therefore, in the event of a short circuit the trigger mechanism is actuated within 3 - 5 ms.

Use device circuit breakers with optimized SFB (selective fuse breaking) characteristic curve to implement longer cable paths in your system. In conjunction with QUINT POWER power supplies from Phoenix Contact, you can achieve maximum protection for your cables and devices. The device circuit breakers can be switched on again at any time.

Our thermomagnetic device circuit breakers are available in a one-piece and a plug-in design. Choose between screw connection and push-in connection technology.

Areas of application

TMCP thermomagnetic device circuit breakers in the control cabinet of a machine  

Thermomagnetic device circuit breakers in the control cabinet

Thermomagnetic device circuit breakers are used primarily in information and communication technology as well as process control. Due to the various tripping characteristics and the fine nominal current stages, the device circuit breakers can be used in diverse applications.

For example, they are ideal for protecting programmable logic controllers, valves, motors, and frequency inverters.

PHOENIX CONTACT (Ireland) Ltd

C6 The Exchange
Calmount Park
Ballymount
Dublin 12
D12 XE18
Ireland
(01)2051-300

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Protective devices – Device circuit breakers

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Circuit Breakers

Selective protection against overload and short circuit


Device circuit breakers

Learning module on how device circuit breakers work.

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