Features: Large current thermal trip circuit breaker with manual reset switch, suitable for auxiliary DC electrical system, when the current reaches a predetermined value, the fuse can be restored to automatically disconnect and protect the circuit. Circuit protection function: When the current reaches a predetermined value, the recoverable fuse will automatically disconnect to protect the circuit. Prevent excessive current and protect electrical appliances. Overcurrent protection, overvoltage protection, residual current protection, overload protection. Simple installation: There is no need to replace the built-in fuse, and it can also be used as an on/off button battery switch. The circuit breaker has simple installation steps and can be installed on any flat panel, or on the wall or in the car. Material and wiring: The shell and parts are made of highly flame-retardant and anti-vibration plastic, with a long service life. It accepts 0/2/4/8 specification power cords with adapters for direct connection with all 12, 24, 48 volt systems. Application: Provide protection against overload or short circuit current when using high current electricity, such as automobiles, ships, trucks, buses, RVs, caravans, tractors, speakers, horns, dual battery isolators for automobiles and winches. Audio Circuit Breakers, Large Current Trip Thermal Circuit Breaker with Manual Reset Switch, Suitable for Auxiliary DC Electrical System. Specifications: Current: 250A Voltage: 12-48V DC Dimensions: 4.01 inch (length) x 2.55 inch (width) x 1.57 inch (height). Material: Plastic and Metal Color: Black Shell + Gray Cover Number of Poles: 2 Features: Manual Reset Suitable Wire Gauge: 0248 AWG Working Temperature: -10 to 50 (-14 to 122). Trigger by current load VS: 100%VS 20-180s; 150% VS 6-40s; 200% 4-25s. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.