Manual reset Visible reset lever shows open condition, unique push button reset Can also be used as a kill switch; Button on circuit breaker can act as a master disconnect for circuits Suitable for a wide range of DC system voltages from 12V to 48V; Designed to protect the system from overcurrent as a result of high power draw, shortcircuits, wiring mistakes, equipment faults or any other high current event;With mount cover protective the stud to be isolated, splash and dust proof Straightforward to install 40A DC 12V 48V; Car Audio Inline Breaker Circuit Fuse 40A,use in place of an inline fuse holder; The circuit breaker can be mounted on panel or firewall Application used in auxiliary and accessory circuits for fit to Boat Marine RV Yacht Battery Trailer Bus Truck ATV Winches applications; Also used in battery charges and DC sound amplifier system Professional material The screw inside is made of pure copper; It is also water resistant IP67; Use the waterproof cover to better prevent rust from metal parts