1Auto Shutdown: This mini circuit breaker will automatically shutdown circuit when the working current exceeds the rated current, or short circuit and voltage loss occur, etc. 2Arc Extinction: This miniature circuit breaker has inbuilt rapid arc extinction device, quickly provide automatic circuit breaker function when there's short circuit at home. 3Easy Installation: This mini NC circuit breaker can be easily installed via guide rail type, saving your time and effort. 4High Safety: This 3P circuit breaker is used for distribution and protection the facilities from damages caused by overload and short circuit. 5Durable Material: This 100A circuit breaker is made of premium ABS and copper material, strong and durable.1 xMini Circuit BreakerItem Type: Mini Circuit BreakerMaterial: ABS, CopperVoltage: 400VRated Current: 100APole Number: 3PProtection Type: Short Circuit Overload ProtectionInstallation Mode: Guide Rail TypeProduct Size: Approx. 8.2 x 7.5 x 8.2cm / 3.2 x 3.0 x 3.2in ( Manual Measurement, Slight Error May Exist )Weight: Approx. 445g / 15.70oz