AC Circuit Breaker made in China MINI CIRCUIT BREAKER MRL7-63 Miniature Circuit Breakers Function: Miniature circuit breakers are characterized by advanced structure, reliable performance, strong breaking capacity, and beautiful appearance. They are mainly used for AC 50HZ or 60HZ, with rated voltage less than 440V, and rated current below 63A. It can be used for overload and short circuit protection of lighting, distribution lines and equipment in office buildings, residential buildings and similar buildings, as well as infrequent on-off operation and conversion of lines. I