30 amps of circuit protection is what you get with this Automotive circuit breaker. protect higher amperage circuit such as Motors, amplifiers, inverters, flood lights, and work lights from short circuits and excess current draw. Shortstop circuit breakers are known for their durability and long life span. Unlike a fuse, a circuit breaker does not need to be replaced in the event of an electrical failure. This reduces down time, as well as cost when it comes to getting your equipment back up. Because no human intervention is necessary to reset the circuit breaker, it can be installed in locations that are hard to access. This particular bussmann 30 amp circuit breaker has no mounting bracket attached to the body of the breaker, making it suitable for use with the gang mounting brackets available separately. This circuit breaker is called a type 1, or automatic reset breaker, meaning that Indy event of a short circuit, the contacts inside of the breaker will open interrupting the circuit for a short period of time. Once that time has passed, the contacts will automatically close again, and circuit functionality will be restored. If the short circuit still exist after resetting, the circuit breaker will simply trip again. Rated for 12 volts DC use only. Do not use this breaker for higher voltages or for ac voltage.