Fast fuse is a kind of fuse, which is mainly used for short circuit protection of semiconductor rectifier components or rectifier devices. Because the overload capacity of semiconductor components is very low. It can only bear large overload current in a very short time, so the short circuit protection is required to have the ability of fast fusing. The structure of the fast fuse is basically the same as that of the enclosed fuse with filler, but the material and shape of the melt are different. It is a variable cross-section melt with V-shaped deep groove made of silver sheet< br> In addition to the metal wire with a certain shape, the fuse of the fast fuse also has a solder joint of some material on it. The purpose is to quickly disconnect the fuse under overload. Fast fuse is a kind of fuse, which is mainly used for short circuit protection of semiconductor rectifier components or rectifier devices< br> Because the overload capacity of semiconductor components is very low. It can only bear large overload current in a very short time, so the short circuit protection is required to have the ability of fast fusing. The structure of the fast fuse is basically the same as that of the enclosed fuse with filler, but the material and shape of the melt are different. It is a variable cross-section melt with V-shaped deep groove made of silver sheet< br> In addition to the metal wire with a certain shape, the fuse of the fast fuse also has a solder joint of some material on it. The purpose is to quickly disconnect the fuse under overload< br> Fast fuse highlights "fast", which means it has high sensitivity. When the circuit current is overloaded, the fuse will heat up quickly under the action of solder joint, and quickly disconnect the fuse. A good fast fuse has high efficiency, which is mainly used to protect thyristor and some electronic power components.