Automatic Reset ATC Circuit Breakers from Cooper Bussmann. These circuit breakers fit into a standard ATO or ATC fuse socket and provide automatically resetting circuit protection. These are thermal type 1 breakers that will automatically try to reset themselves after they trip. Auto reset circuit breakers are rated for 12 volts DC use. Available in 10 amp, 15, amp, 20 amp, 25 amp, and 30 amp current capacities. The amperage rating and voltage rating are printed on the circuit breaker for easy identification. A circuit breaker that constantly trips indicates an electrical problem that needs to be addressed right away.