Durable Material: AR overload protector housing material for the main body of UL rate 94V0 thermoplastic made of rubber protective cover for the PVC flame retardant material, IP64 protection standards, waterproof, oil and dust, durable. Practical Function: This circuit breaker is available in 30A, 40A, 50A for DC 6-28V applications, can be mounted in 4 directions, easily isolates circuits from short circuits by protecting circuits from the elements in power and automotive applications. Tripping Test: Test ambient temperature: 25C 3C, 200% of rated current: decoupled within 4-40s'', 150% of rated current: decoupled within one hour, 100% of rated current: remain uncoupled. Automatic reset, cycling on and off until the fault is corrected. Safe to Use: No need to worry about fuse blowing, with automatic thermal reset function, overload/short circuit power protection is provided by this overcurrent circuit breaker, reliable rustproof plastic case, which can well protect the internal circuit breaker. Wide Compatibility: Suitable for caravan yacht, off-road vehicle winch, control electrics, power tools, power sockets, all kinds of generators, electric motors, electric heating appliances, battery chargers, car engine electric control, etc., make your life more convenient.