Device circuit breakers

Signal for signal protection

Signal for signal protection

Do not take any chances: 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 through servo motors and indicator lights to PLC inputs or industrial PCs.

Your advantages

  • High system availability, thanks to selective protection
  • Reliable protection of your devices – targeted shutdown in the event of an error
  • Versatile, thanks to the various trigger mechanisms
  • Solutions for many applications, thanks to the comprehensive product range

Targeted shutdown

Device circuit breakers usually protect individual items of equipment. In the event of an error, they only 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 device circuit breakers for overload, short-circuit, cable attenuation, and high input capacitance protection


 Tripping time in the case of overloadTripping time in the case 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 device circuit breakers IdealIdeal
  • Overload
  • Short circuit
  • Long cable paths (thanks to active current limitation)


8240 Parkhill Drive
Milton, Ontario L9T 5V7


Configure products and solutions for your individual application.

Protective devices – Device circuit breakers


Circuit Breakers

Selective protection against overload and short circuit

Device circuit breakers

Learning module on how device circuit breakers work.

Current limitation – what is it?

Behaviors of circuit breakers with or without active current limitation