The cartridge style fuses are for providing both increased time delay and low voltage drop to protect high current circuits and handle inrush currents. Coming in two different sytles of "female" to bolt on, Jcase cartridge fuses are designed and patented by LittleFuse Inc, and can handle (based of which fuse you choose) up to 120 Amperes. Please browse our selections and give us the chance to save you money with our always low and competitive pricing at All Battery Sales and Service.