York S1-FNQR3 Time Delay Cartridge Fuse 3A 600V

The York S1-FNQR3 3A 600V Time Delay Cartridge Fuse is a protective circuit part used to protect low-voltage controls and circuits from overloads and short-circuit conditions in HVAC systems. It has a 3 amp rating with a 600-volt capacity and a time-delay operation that allows current during equipment start-up without tripping. It is placed in furnace and air handler control panels. It helps protect transformers, control boards, and ignition circuits in systems. It is used to maintain electrical operation and consistent system protection in systems.