Device circuit breakers

Device circuit breakers

Signal for signal protection

Do not take any risks: When protected effectively, your systems will run without interruption and production will never be stopped.

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Machine failure can result in significant costs. Do not let it come to this. Provide individual protection for your operating equipment with device circuit breakers from Phoenix Contact – from solenoid valves to servo motors and indicator lights to PLC inputs or industrial PCs.

Your advantages

  • High system availability with selective protection
  • Reliable protection of your devices – targeted shutdown in the event of an error
  • Versatile use with various tripping mechanisms and low nominal current levels
  • Solutions for many applications with the comprehensive product range

Targeted shutdown

Device circuit breakers usually protect individual items of equipment. In the event of an error, they selectively shut down the affected actuator or sensor in the faulty circuit.

This means that the production process continues running without interruption.
Based on their function, device circuit breakers can be split into the following groups:

  • Thermal device circuit breakers for overload protection
  • Thermomagnetic device circuit breakers for overload and short circuit protection
  • Electronic circuit breakers to protect against overloading, short-circuiting, cable attenuation, and high input capacitance


 Tripping time in the event of overloadTripping time in the event of short circuitYour application is optimally protected in the event of
Thermal device circuit breakers SuitableUnsuitable
  • Overload
Thermomagnetic device circuit breakers SuitableIdeal
  • Overload
  • Short circuit
  • Long cable paths (thanks to SFB tripping characteristic)
Electronic circuit breakers IdealIdeal
  • Overload
  • Short circuit
  • Long cable paths (thanks to active current limitation)

CAPAROC customizable device circuit breaker system

CAPAROC device circuit breaker system  

CAPAROC device circuit breaker system

Discover CAPAROC, the customizable device circuit breaker system. Create your fully tailored standard in-device protection out of the versatile combination options for the power modules and device circuit breaker modules. Moreover, benefit from the possibilities of integrated potential distribution, the intuitive operation, and strikingly simple design-in. You are perfectly positioned for the future with system.


586 Fulling Mill Road
Middletown, PA 17057
(800) 888-7388


Configure products and solutions for your individual application.

Circuit breaker


Circuit Breakers

Selective protection against overloads and short circuits

Current limitation – what is it?

Behaviors of circuit breakers with or without active current limitation