Fuses, also known as circuit breakers, are defined by the IEC 127 standard as "fusing element (fuse-link)."(Fuse) is an electrical component installed in circuits to ensure the safe operation of the circuit. The role of a fuse is: when a circuit malfunctions or experiences an abnormality, the current continues to rise, and the rising current may damage certain important or valuable components within the circuit, or even cause the circuit to burn and potentially lead to a fire. If a fuse is properly installed in the circuit, it will melt and break the circuit when the current rises abnormally to a certain level and for a certain duration, thereby cutting off the current and protecting the circuit from unsafe operation.