Nilight 120A Circuit Breaker Resettable 12-48V DC Manual Reset w/Copper Wire Lugs Surface Mount Overload Protection for Car Audio Sound Amplifier System RV Marine Boat Truck, 2 Years Warranty. Typically used in auxiliary and accessory circuits for trucks, buses, RV’s, ATV winches and marine applications. Also used in battery charges and DC sound amplifier system, vehicle audio video system, boat, marine and all 12V-48V systems.