A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit . Its basic function is to interrupt current flow after a fault is detected. Unlike a fuse , which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Features: Automatically switches off electrical circuits during abnormal network conditions Miniature circuit breakers are ideal for use in new constructions Ideal for use in small-scale industrial buildings that use miniature circuit breakers instead of fuses Safer and easier to handle than fuses Specification: Place of Origin: china Brand Name: MCB AC Circuit Breaker 5SY4263-7 SEIMENS Rated Voltage :380v Type 1: circuit breaker 5SY4263-7 Type 2 : miniature circuit breaker 5SY4263-7 Type 3 :wifi circuit breaker 5SY4263-7 Type 4 :vacuum circuit breaker 5SY4263-7 Type 5 :earth leakage circuit breaker 5SY4263-7 Type 6 :DC circuit breaker 5SY4263-7 Type 7 :RCBO 5SY4263-7 Type 8 :MCCB 5SY4263-7 condition: original and new 5SY4263-7 Rohs : yes Type: Air Poles Number :3 BCD Curve : C Rated Frequency : 50/60h Package Includes: 1 x MCB AC Circuit Breaker 5SY4263-7 SEIMENS