What is a fuse?
A fuse is a protective device that is designed to protect an electrical power system from the harmful effects of over-currents (currents higher than the normal operating current).
Fuses are sacrificial in that they are generally good for one time use and are destroyed in the process of operating. The use of fuses in a circuit provides cheap insurance should there be an accidental or unintentional fault in the system wiring or components.
