Drop-out Fuse

Cutout fuse is mainly made of copper, silver and their alloys.

Copper fuse:

Features: Copper has good conductivity, allowing current to pass smoothly and ensuring stable transmission of power in power lines. Its melting point is relatively high, about 1083℃, which can maintain the connection of the line under a certain degree of overload current impact, providing a certain tolerance for the system.
Limitations: Copper is easily oxidized in the air, and the generated copper oxide will affect its conductivity to a certain extent. Therefore, the application scenarios of pure copper fuses have certain limitations, and some special anti-oxidation treatments or alloys with other elements are usually used to overcome this drawback.

Silver fuse:

Features: Silver stands out with its excellent conductivity and is one of the ideal conductive materials. The melting point of silver is 961.78℃, which is slightly lower than that of copper. This means that when encountering an overload or short circuit fault, the current increases sharply and generates enough heat, the silver fuse can melt faster, quickly cut off the circuit, and protect the power equipment from damage caused by long-term impact of overload current.
Advantages: Silver has relatively stable chemical properties and is not easy to oxidize. It can maintain good electrical conductivity for a long time, ensuring reliable operation of the fuse.

Copper-silver alloy fuse:

Application: The fuse of the drop-out high-voltage fuse often uses copper-silver alloy wire (such as an alloy of 60% copper and 40% silver). This alloy combines the advantages of copper and silver, has good electrical conductivity, and can reduce the melting point to a certain extent, improving the sensitivity of the fuse.

In summary, the material selection of the drop-out fuse needs to be determined according to the specific application scenario and requirements to ensure the safe operation of the circuit.