Time-delay automotive cartridge fuses are female standard fuses that provide a low voltage drop for protecting high-current circuits. Also called JCASE fuses, these slow-blow cartridge fuses tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups. They open to disconnect an electrical circuit when exposed to sustained loads and short circuits.
Fast-acting automotive cartridge fuses withstand high temperatures to protect high-current circuits such as alternators and starters. They open within seconds of being exposed to overloads and short circuits. Also called fast-blow cartridge fuses, they are highly sensitive to changes in current flow and don't tolerate temporary overload currents or power surges.
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