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

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

New products

CAPAROC – power modules with communication interface
CAPAROC circuit breaker system
Power modules with communication interface

The customizable circuit breaker system protects your loads and creates end-to-end transparency in your 24 V supply. Due to the various power modules, integration into the system is implemented quickly and easily.

These are the main features

  • Can be used in a wide range of applications thanks to various power modules
  • Complete transparency of the 24 V supply system through a common PROFINET interface
  • Easy integration in machine building and systems manufacturing thanks to the IO-Link interface

These are the advantages

  • PROFINET with system interface to QUINT Power
  • IO-Link communication
  • Supply voltage: 12 V DC … 24 V DC

TCP – Optimal protection in the event of overload
Thermal circuit breakers for higher nominal currents
Optimal protection in the event of overload

The product range of the TCP thermal circuit breaker is being expanded to include the new 16 A and 20 A variants. This means that loads with higher nominal currents can now also be thermally protected and switched off during maintenance.

These are the main features

  • Reconnection options for fast, replacement part-free recommissioning after a fault
  • Easy to retrofit in existing systems with vehicle flat-type fuses with identical pin connector pattern
  • System disconnection for maintenance actions via the integrated device switch

These are the advantages

  • Overall width: 10.2 mm
  • Rated voltage: 250 V AC or 72 V DC
  • Individual marking options
  • Optical detection in the event of a fault

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)
Title CAPAROC brochure

Further information about device circuit breakers in our e-paper

You will find more information about our device circuit breakers in digital form here. Take a look at the e-paper or download our brochures as PDF files.

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.