FusesA fuse is a device that is used to protect an electrical circuit from damage due to excessive current. It consists of a strip or wire of fuse material, such as metal or glass, that is connected in series with the circuit. If the current in the circuit exceeds a certain level, the fuse material will melt, breaking the circuit and interrupting the flow of current. This protects the circuit and its components from overheating, short-circuiting, or other forms of damage. Fuses are available in a variety of sizes, ratings, and types, and are used in a wide range of applications, from small electronic devices to large electrical systems.