What kind of material are fuses made of?

Fuses must be easily melted metal wire in order to melt in time when the current is high, play a protective role, so usually use lead antimony alloy wire. Fuse materials are mainly made of aluminum antimony alloy and other low melting point alloys.

Aluminum-magnesium alloy aluminum plate is the main element of aluminum, mixed with a small amount of magnesium or other metal materials to strengthen its hardness. Aluminum alloy with Mg as the main added element is also known as rust-resistant aluminum alloy because of its good corrosion resistance.

Because it is a metal itself, its thermal conductivity and strength is particularly outstanding. Aluminum-magnesium alloy aluminum plate is firm and lightweight, low density, better heat dissipation, compression resistance, can fully meet the 3C products highly integrated, thin, light, miniaturized, anti-drop and electromagnetic shielding and heat dissipation requirements. Its hardness is several times that of traditional plastic chassis, but its weight is only one-third of the latter.

Expanded Information:

Fuse Working Principle:

1, when the current flows through the When the current flows through the conductor, because the conductor has a certain resistance, so the conductor will heat up. And the amount of heat follows the formula: Q = 0.24I2RT; where Q is the amount of heat, 0.24 is a constant, I is the current flowing through the conductor, R is the resistance of the conductor, T is the current flow through the conductor time; according to this formula, we are not difficult to see the simple principle of the work of the fuse.

2, when the material and shape of the fuse is determined, its resistance R is relatively certain (if you do not take into account its resistance temperature coefficient). When the current flows through it, it generates heat, and its heat generation increases with time.

3, the current and the size of the resistance to determine the rate of heat generation, the construction of the fuse and its installation to determine the rate of heat dissipation, if the rate of heat generation is less than the rate of heat dissipation, the fuse will not blow. If the rate of heat generation is equal to the rate of heat dissipation, it will not blow for a long time.

4, if the rate of heat generation is greater than the rate of heat dissipation, then the heat generated will be more and more. And because it has a certain specific heat and mass, the increase in heat is manifested in the increase in temperature, when the temperature rises above the melting point of the fuse fuse. This is how a fuse works.

5, we should know from this principle, you in the design and manufacture of fuses must carefully study the physical properties of the materials you choose, and to ensure that they have consistent geometry. Because these factors play a critical role in the proper functioning of the fuse. Likewise, when you use it, you must install it correctly.

Baidu Encyclopedia - Fuse