Overcurrent circuit breaker using bimetal structure, quickly cuts power when overloaded for protection. Rubber protective cover protects terminals from moisture, dust and accidental shorting. Black UL 94V0 thermoplastic body with gray cover; includes one copper post, one plated terminal and a plastic parallel mounting bracket. Suitable for battery chargers, auto, trucks, buses, RVs, trolling motors, etc. Specifications: Material: Metal + Plastic; Rated Current: 20A, 30A, 40A, 50A (Optional); Working Voltage: 12-28V DC; Interrupt Rating: 2.5KA @ 12V DC; Operating Temperature: -40°C to 85°C; Waterproof Rating: IP66; Size: One Size (Length: 5.1cm/2in, Width: 2.1cm/0.82in); Quantity: 1 Pc (other accessories demo in the picture not included). Color: as shown in the picture. Note: Manual measurement may cause 0-1cm error. Monitor differences may affect color display. Package includes: 1 x Manual Reset Breaker (without retail package).