Fuse wire is a piece of wire with a low melting point that breaks when the temperature rises above it due to a surge in power. Fuse wire is typically made from zinc, lead, or tin and is used in electrical circuits to prevent excess current from flowing through the circuit. It is usually fitted in a porcelain casing because porcelain is an insulator.

Additionally, fuse wire is often used by florists to stiffen stems in flower arranging displays and can also be used to pin wires to the arms of chandeliers, as it does not rust or discolor.