15 amp short-circuit and overcurrent protection in a small package. Shortstop brand 15 amp Automotive Auto reset circuit breaker with a right angle mounting bracket, allowing the circuit breaker to be easily attached to any surface. Rated for use in 12 volt DC electrical systems only. Suitable for protecting wire sizes such as 16 gauge and 14 gauge from catastrophic electrical failure such as fire. All shortstop circuit breakers are thermal, and have a temperature de-rating curve of around 30%. This means that the circuit breaker trip threshold could vary by up to 3 amps, depending upon the outside temperature. This is fine for almost all automotive type circuits as the circuit breakers primary function is to protect against direct shorts to ground. Why use a circuit breaker instead of a fuse? The first time you can't find a 15 amp fuse to get your circuit working again, you'll wish you had used a 15 amp circuit breaker instead.