Overview of device circuit breakers

Device circuit breakers

Device circuit breakers protect your equipment against overload and short-circuit currents and selectively shut down just the affected circuit in the event of a fault. To provide the ideal protection, our circuit breakers use various technologies: electronic, thermomagnetic, and thermal. Optimize your production process and minimize downtimes by using our overcurrent protection.

More information

Product Family

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
Various device circuit breakers

Electronic and thermomagnetic device circuit breakers

Various circuit breaker technologies

Based on their function, device circuit breakers can be divided into the following groups:

  • Thermal device circuit breakers for overload protection
  • Thermomagnetic circuit breakers for overload and short-circuit protection
  • Electronic circuit breakers for protection in the event of overload, short circuit, cable attenuation, and high input capacitance

Targeted shutdown

Circuit breakers usually provide individual protection for equipment. In the event of an error, they shut down only the affected actuator or sensor in the faulty circuit.

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

  • Thermal circuit breakers for overload protection
  • Thermomagnetic circuit breakers for overload and short-circuit protection
  • Electronic circuit breakers for protection in the event of overload, short circuit, cable attenuation, and high input capacitance
Tripping time in the event of overload

Tripping time in the event of a short circuit

Your application is optimally protected in the event of

Thermal circuit breakers Suitable Unsuitable Overload
Thermomagnetic circuit breakers Suitable Ideal Overload, short circuit and long cable paths (thanks to SFB tripping characteristic)
Electronic circuit breakers Ideal Ideal Overload, short circuit and long cable paths (thanks to active current limitation)
PTCB – the narrowest single-channel circuit breaker

PTCB – the narrowest single-channel circuit breaker measuring just 6 mm

Miniature circuit breakers or device circuit breakers

Here is a brief explanation of the difference between miniature circuit breakers and device circuit breakers:

Miniature circuit breakers protect power distribution cables in buildings or systems. To protect the power supply line against overload, they safely shut down only in the event of a short circuit in the end device.

In contrast, device circuit breakers are the effective protection stage for end devices and protect against short circuit and overload. They can be optimally adapted to loads. For this reason, their nominal currents start at less than 1 A and they are subdivided into small current increments. If you protect individual loads or small function groups individually, unaffected system parts can continue operating in the event of an error, insofar as the overall process allows this.

Electronic circuit breaker system with PROFINET module, fuses, and potential distributors

Electronic circuit breaker system with PROFINET module, fuses, and potential distributors

CAPAROC – configurator for an electronic circuit breaker system

Design your customized circuit breaker system to meet your requirements. In addition, you will receive all important planning data, such as 2D and 3D models, a system data sheet, and an individual order number. Order your customized system starting from a batch quantity of just 1.