Get your semi truck Ready for the Road Ahead™ with advanced electrical system protection, with the Littelfuse 30V 150-Hi-Amp Thermo Plastic Circuit Breaker. This replacement component automatically cuts the power in a circuit when an excess flow of amps is detected, preventing potential damage or overheating in various devices. Engineered with simple controls that allow for manual resetting unlike traditional fuse boxes that require new components each reset. FleetPride is your First Click in Heavy Duty®.