Features: This 30-amp circuit breaker with a manual reset switch is designed for auxiliary DC electrical systems, including automotive and marine use. It automatically disconnects the circuit when the current exceeds the set threshold, providing reliable protection for DC 12V-48V circuit breaker applications. Circuit Protection Function: The high-amp manual reset 30-amp fuse circuit breaker automatically disconnects when the current reaches the predetermined limit, providing powerful protection to protect the circuit from excessive current. It includes overcurrent, overvoltage, residual current, and overcharge protection to prevent damage to electrical equipment, making it an ideal choice for automotive circuit breaker needs. Material and Wiring: This 30-amp marine circuit breaker bracket is made of highly flame-retardant and shock-resistant plastic, which is durable and has a long service life. It is compatible with 0/2/4/8 gauge power cords and comes with an adapter for seamless connection to all 12V and 24V systems, ensuring safe and efficient power management. Easy to Install: No internal fuse needs to be replaced; it also doubles as a battery on/off switch. This 30 amp 12V circuit breaker mounts directly to any flat surface, wall or vehicle, ensuring ease of use in a variety of settings. Applications: Ideal for protecting against overloads and short circuits in high current applications such as automotive, marine, RV, caravans, tractors, sound systems, horns, dual battery isolators and winches. This high amp 30a 12v circuit breaker fuse is ideal for automotive, marine and auxiliary DC electrical systems, providing a versatile solution for automotive circuit breaker and marine circuit breaker needs. Colour:As Shown Material:Plastic Package Contents: 1 * 30A circuit breaker 1 * wrench