Specification: Waterproof breaker switch compatible with all 12V/48V DC Systems, 30A 40A 50A 60A 70A 80A 100A 120A 150A 200A 250A 300A For Choose. Function: Always protect the safety of automotive electronics, Prevent car currents from being too high and damage automotive electronic equipment. Wide Application: Typically used in solar system, battery charges, inverter, Car audio video system, boat, RV and DC sound amplifier system. save money: Two modes, Current overload disconnection and manual disconnection.After the circuit is repaired, the switch turns ON and the fuse block can be used again.No need to replace the fuse. Easy to use and durable: Good Conductivity, Temperature And Pressure Resistance,Splash and dust proof Water proof.can be mount on panel or firewall. Fit type: Universal