Fuses are critical electrical safety devices designed to protect electrical circuits and equipment from excessive current flow. These small, cylindrical components are typically made of metal or ceramic materials and come in various current ratings and sizes to suit different applications.

When a circuit experiences an overload or short circuit, the fuse is deliberately designed to melt or blow, interrupting the flow of electricity and preventing damage to the connected devices or wiring. This action effectively isolates the faulty portion of the circuit, safeguarding against potential fires or electrical hazards.