Prepare your truck to be ready for all types of conditions with advanced electrical system protection, with the OTR 30V 150-Hi-Amp Circuit Breaker with Expertise Built In. To prevent potential damage or overheating in various devices, this replacement component works to automatically cut the power in a circuit when an excess flow of amps is detected. Fashioned 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.