selection of fuses

DELAY FUSES allow surge currents without opening. They are used to  protect motors, solenoids, and transformers.

STANDARD FUSES have neither a time delay nor a fast acting characteristic. They are used in automobiles, lighting  circuits and electrical power circuits.


FAST FUSES open very quickly with any current above the current rating of the fuse. They are used to protect delicate instruments or semiconductor devices such as UPS power devices