Miniature Circuit Breakers (MCB)

Miniature Circuit Breakers (MCB)

Protecting electrical equipment against damage

The number of electrical consumers continues to grow – and along with them the load on electrical systems. In the event of overload or a short-circuit, miniature circuit breakers (MCBs) safely cut the connected circuit and thus reliably protect electrical systems and devices against damage. Miniature circuit breakers (MCBs) in the SENTRON portfolio are also easy to assemble and install. The devices feature a uniform design, and can be expanded to include many more functions thanks to an extensive range of accessories. For industries, buildings or infrastructure – our extensive portfolio has the right MCB for every application.

Miniature circuit breakers for all applications

Miniature circuit breakers protect electrical systems against overload and short circuits. With tripping characteristics A, B, C and D, all fields of application in industry, residential and non-residential buildings are covered. The special design of the terminals in Siemens devices also ensures highly-effective touch protection.

A comprehensive portfolio

Siemens offers a complete range of miniature circuit breakers from 0.3 to 125 A in all required A, B, C and D characteristics. This means that all applications are covered.

Maximum conductor protection

With miniature circuit breakers from Siemens, you can expect the highest quality and reliability. The excellent technical properties of the devices mean you are always on the safe side. Apart from that you benefit from the innovative mounting options which enable quick and easy installation

Wide range of additional components and accessories

The miniature circuit breakers from Siemens can be combined as required with a wide range of supplementary components e.g. control current switches, fault signal contacts, shunt releases, undervoltage releases, remote operating mechanisms or with RCCB units to provide protection for persons and against fire.


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