A general fuse consists of three parts:

The first part is the melting part, which is the core of the fuse. When it melts, it has the effect of cutting off the current. Fuses of the same type and specification should have the same material, small geometric dimensions, low resistance, and consistent melting function. The commonly used household fuses are made of lead-antimony alloy.

The second part is the electrode part, usually two of them. It is an important part that connects the melting part and the circuit. It must have good conductivity and should not produce obvious installation contact resistance.

The third part is the support, which is used to fix the melting part and make the three parts a rigid whole that is easy to install. When in use, it must have good mechanical strength, insulation, heat resistance, and flame retardancy, and should not produce phenomena such as fracture, deformation, combustion, and short circuit.

The fuse must be made of a metal wire that is easy to melt so that it can melt and cut off the current in a timely manner when the current is too large, thus providing protection. Therefore, lead-antimony alloy wire is usually used for fuses. The material of the fuse is mainly made of low-melting-point alloys, such as aluminum-antimony alloy.

Aluminum-magnesium alloy aluminum plate is the main component of aluminum, and then mixed with a small amount of magnesium or other metal materials to enhance its hardness. Magnesium, as the main additive of aluminum alloy, is also called rust-proof aluminum alloy due to its good corrosion resistance. Because it is a metal, its thermal conductivity and strength are particularly outstanding.

Aluminum-magnesium alloy aluminum plate is sturdy, lightweight, low-density, has good heat dissipation, strong compression resistance, and can fully meet the requirements of high integration, lightweight, miniaturization, impact resistance, electromagnetic shielding, heat dissipation, and other requirements of 3C products. It is several times harder than traditional plastic shells, but weighs only one-third. This structure is commonly used in one-time fuses.