Miniature circuit breakers (MCB) are primarily designed to protect cables and lines against overload (thermal) and short-circuit (electromagnetic). They thus care for protecting this electrical equipment against excessive temperature rises and destruction in the event of a short-circuit. Miniature circuit breakers are used in distribution networks in homes and in industrial applications. They meet the requirements for different applications by various designs and with the aid of a comprehensive range of accessories (for example auxiliary and signal contacts etc.).
3-pole plus neutral MCB , In=2A, Characteristic curve C(SOURCE: ABB)