Circuit Breaker DC 100A: The circuit breaker has a manual reset button switch, which can conveniently control the circuit break, equivalent to the effectiveness of the fuse, effectively protect the car electrical appliances, with over-current protection, over-voltage protection, current residual protection and overcharging protection. 12V-48V DC: 48V voltage circuit breaker can significantly improve the safety level of the power supply system, 48v dc power supply is a specific voltage level, it is mainly used for higher safety requirements and smaller power appliances, normal use conditions have higher safety. But at the same time also need to be based on the specific use of the environment and the characteristics of the equipment to carry out a reasonable configuration and the adoption of protective measures. Circuit breaker black shell is ABS anti-drop material, wiring post is pure copper nickel-plated material, with stronger resistance, and of the combination is better. Comes with 3 stainless steel screws and 2 pure copper terminals block 6AWG*5/16. Circuit breaker is easy to install: You can mount the circuit breaker on the panel or firewall. Widely applications: can to protect electrical equipment and wiring.It can be used in car stereos, RVs, trucks, marine boats , trolling motors, stereo audios, battery chargers, solar systems, DC audio systems, etc. Colour:Black Material:Plastic Package Contents: 1 * Circuit Breaker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.