BM-100 series miniature circuit breakers are used to protect short circuit and overload of the circuit, for lighting distribution protection system and distribution protection system of motor. Beautiful, light, excellent performance, reliable and high breaking capacity, tripping rapidly, shell use high flame retardant and impact resistant plastic and components, long service life, it is mainly used for ac 50Hz or 60Hz, unipolar 230V, two, three, four 400V circuit overload, short circuit protection, at the same time can also under normal circumstances do not frequent on-off electrical devices and lighting.