Manual Reset Circuit Breaker 20A–300A 12V–48V Waterproof DC Fuse for Car Audio, Marine & RV

This heavy-duty manual reset circuit breaker is designed to protect high-current 12V–48V DC electrical systems from overloads and short circuits. Ideal for car audio systems, amps, winches, marine, RV, caravan, and auxiliary power setups, it replaces traditional inline fuses with a safer, reusable solution.

Featuring a waterproof, heat-resistant housing and a manual reset button, this breaker allows fast recovery without replacing blown fuses. It can also be used as a battery isolation or kill switch, making it perfect for off-road, marine, and performance vehicles.

Built with high-quality plastic-metal construction and zinc alloy hardware, this circuit breaker is designed for reliable operation in harsh environments including vibration, moisture, and temperature extremes.

Suitable for surface mounting on firewall or panels. Professional installation is recommended for high-current applications.

✔ Manual reset – no fuse replacement required  
✔ Waterproof design – marine and off-road ready  
✔ Protects amps, batteries, winches, and accessories  
✔ Can be used as an on/off kill switch  
✔ Suitable for car, truck, boat, RV, caravan & 4WD setups  

A must-have upgrade for anyone running serious electrical accessories.