Review on 🔊 WOHHOM 150A Audio Circuit Breaker For Car Stereo, Inverter & Marine Boat Audio System Protection - Manual Reset, 12V-24V DC, Automotive Compatibility by Brian Edwards

There are many ways to protect an electrical circuit in a car and the simplest is a fuse. I like switches like this because they give you the ability to turn off the circuit when not in use, much like a switch. Current is supplied at one pole and disconnected at the other. It is so easy. Note that they're not all the same: this one is rated for 30 amp tripping, so you'll need to know what's in your circuit to choose your breaker size.