Product size: 7.4 * 4.8 * 4.5CM, material: plastic + metal. High ampere thermal trip circuit breaker with manual reset switch, suitable for electrical systems in harsh environments like racing cars, providing protection against overload or short circuits. Protective rubber cap prevents unnecessary short circuits. Commonly used in truck, bus, RV, and marine applications; also for battery and audio systems. Sealed waterproof unit (IP67) for engine compartment and bilge areas. Manual reset switch quickly disconnects circuit in emergency. Connecting bolt size: M6 x 2 nut with integral locking ring to prevent loosening from vibration. Specifications: Circuit rating 30A,40A,50A,60A,70A,80A,100A,120A,150A; Voltage 12-48V; Interrupt rating 3000A @30V; Operating temp -32°C to 82°C; 2 poles; Color: black (as shown). Package includes 1 x Circuit Breaker (OPP packaging). How to use: 1. Open circuit protection: Automatically trips when current exceeds rating, reset by pressing handle after fault removal. 2. Manual power off: Press red button to disconnect, reset by pressing handle.