The fuse is also called a current fuse, and the IEC127 standard defines it as "fuse (Fuse-link)". Its main function is overload protection. The correct placement of the fuse in the circuit, the fuse will be in the current abnormally elevated to a certain height and heat, the self fuse cut off current, to protect the safe operation of the circuit

The fuse invented by Edison more than 100 years ago was used to protect the expensive incandescent bulbs at the time, and with the development of the times, the fuse protects the power equipment from overheating, avoiding the serious damage caused by the internal failure of the electronic equipment.