Miniature circuit breaker is designed for overload and short circuit protections. This product is novel in structure, light in weight, reliable and excellent in performance. Its cases and body is adopted with high fire-resistant and shockproof plastics. The product is mainly used in AC 50HZ/60HZ single-pole 240V or two, three, four-pole 415V circuit for protection again overload and short-circuit as well as for infrequent switch over of circuit under normal condition. This product conforms to GB10963, IEC60898.