MRB65-100H high breaking capacity miniature circuit breaker is used for AC 50Hz or 60Hz, single pole 240V, 2, 3, 4 poles 415V for protecting the circuit that overload and short circuit may take place. It can be used in lighting and electric motor distribution system. Meantime, it is applicable to an unfrequent switch over the electric apparatus and lighting circuit under normal condition. The products comply with IEC60898.