Thermal AC/DC Circuit Breakers are designed to protect an electrical circuit from damage caused by excess current. Vibration and shock resistant these push-to-reset circuit breakers are an economical alternative to magnetic breakers. Unlike sacrificial fuses they have the advantage of being resettable after tripping. Panel mounted compact design. Constructed of molded Bakelite with quick connect, terminal style, stamped brass contacts. Optional Thermal Breaker Boot (420839) provides additional protection in wet environments.