This 300A AMP Circuit Breaker Fuse is designed for automotive and marine applications. It features a Type A tripping characteristic and is suitable for both interior and exterior use. The fuse block has thermal overload protection and is waterproof with an IP67 rating, making it ideal for use in harsh environments. With a voltage range of 12V-48V DC, this circuit breaker is equipped with two outlets and two ports, controlled by a switch for on/off operation. It is made of ABS/plastic material and has a screw terminal electrical connection for easy installation.