6 Way/12 Way Blade Fuse Box Block Holder ATO ATC for Car Marine Boat WaterproofFunction of fuse: When the circuit fails or is abnormal, the current continues to rise, and the increased current may damage some important or valuable components in the circuit, and may also burn the circuit or even cause a fire. Fuses protect electronic equipment from overcurrent and also protect electronic equipment from serious injury caused by internal faults. Therefore, there is a rating on each fuse, and when the current exceeds the rating, the