A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by an overcurrent or short circuit . Its primary function is to interrupt current flow to protect equipment and prevent fire risk. Features: Protects DC circuits from overcurrent and short circuits High-current rating up to 300A Quick and reliable switching operation Durable mechanical and thermal construction Compact design for panel mounting Specifications: Type: Moulded Case Origin: CN(Origin) is_customized: Yes Model Number: TOM7Z-400/4300 Is Smart Device: Yes Certification: CE Certification: RoHS Rated Voltage: 12-500V Rated Current:30 0A isolation voltage: 800V altitude: Less than 2000M Utilization Category: A air temperature: -5 to+40Celsius Protection type: Overload / short circuit protection Uses: Protecting DC circuits in solar power systems Industrial DC load protection DC distribution panel safety Preventing equipment damage from overcurrent Suitable for commercial and renewable energy installations Package Includes: 1 x Tomzn DC-MCCB TOM7Z-400/4300 MCCB DC Circuit Breaker