YGM-125 MCB is such features as delicate appearance, lightweight, excellent and reliable performance, high breaking capacity, rapid tripping and mounted by rail. Its enclosure and components adopt high fire-retarding and shock-resistance plastic of long durability. It mainly serves for protecting the circuits of AC 50/60Hz, 230V of single-pole, 415V of two poles, or three or four poles from overload or short-circuit, and also for infrequent making and breaking electrical apparatus and lighting circuit. It conforms with the standards of IEC60947-2.