When you need 25 amps of circuit protection, it's hard to beat this Bussmann shortstop circuit breaker. Unlike a fuse, a circuit breaker can endure thousands of interruptions, and continue providing protection from short circuits. The shortstop brand is known in the industry for being robust and reliable. these type of circuit breakers have been protecting Automotive electrical circuits for decades, providing a better alternative to traditional fuses. this circuit breaker is rated for 25 amps and is a type 1 Auto reset breaker. It operates based on resistance, and as more current flows through the breaker, the contacts will heat up and separate. Being an auto reset breaker, once the contacts cool back down, they will automatically close themselves allowing electricity to again flow through the circuit. Wires connect to the circuit breaker via #10 - 32 studs. One stud is copper in color and is labeled BAT, the other is labeled AUX. The base of the breaker has an attached parallel mounting bracket to allow the breaker to be easily attached to any surface. Suitable for for providing short circuit protection for automotive, marine, and other 12 volt DC electrical circuits.