Principle of operation

In general operation, the current passes through the fuse of FUSE to generate heat, and the heat is transmitted to the shell (Body) through conduction/radiation, and gradually reaches a thermal equilibrium with the environment. In case of overload or short circuit, the high current generates high heat, which cannot be dissipated and breaks the thermal balance, and the fuse gradually heats up, eventually leading to melting.

Structure and Material Composition

Glass fuse has 4 main parts:
1, welding material: tin 2, copper cap: copper nickel-plated 3, body: glass tube 4, fuse: alloy wire

Classification

First, according to the different installation forms
With lead and without lead.
Glass fuses without leads need to be used at the same time as the supporting fuse holder, the advantage of these products is that when the fuse is damaged, troubleshooting, you only need to reinstall the fuse to the inside of the fuse holder, the replacement is very convenient, the shortcomings is that in the production of the time, the need for more than one process, you need to weld the fuse holder after the installation of the fuse once again, so the same specifications, the first time the production of the first time, without leads, the cost of the fuse is higher than that with a lead. Therefore, under the same specifications, the first production, the cost of the fuse without lead is slightly higher than the cost of the fuse with lead.
With the lead of the pre-production costs are lower, only one process and reduce the cost of a fuse holder, but when the fuse is damaged, it needs to be disassembled and then replaced by professionals, the replacement cost is very high.

Second, according to the different breaking capacity
High breaking (H), low breaking (L).

Third, according to the different sizes
Glass fuses can be divided into 3.6 * 10, 4.6 * 16, 5 * 20, 6.3 * 30, etc., the specific size according to each factory, the size of these types of dimensions is the size of the greater use.