Do you know why brass is the inner cap in the fuse?

Reasons for brass fuse inner caps:

1. Conductive properties: Brass is an excellent conductive material with low electrical resistance and good electrical conductivity. The use of brass in the inner cap of the fuse can reduce the contact resistance, reduce the heat generated by poor contact, and maintain the stability and efficiency of the circuit.

2. Thermal Conductivity: Brass also has good thermal conductivity and can dissipate heat effectively. In the fuse inner cap, when the current is overloaded, the brass inner cap can quickly conduct heat, accelerate the fusing process and prevent overheating.

3. Corrosion resistance: Brass has good corrosion resistance, which can protect the contact from rust or oxidation, and ensure the stability and reliability of the contact.

Reasons for the outer cap of the copper fuse:

1. Softness: Compared with brass, copper is softer and easier to form and process. Therefore, copper is often used as the outer cap of the fuse, which can be easily manufactured into various shapes and specifications to adapt to different types of fuse shells.

2. Conductivity: Although the conductivity of copper is slightly lower than that of brass, its conductivity is sufficient to meet the demand for parts that are not directly in contact with the current, such as the outer cap.

All in all, brass is used as the inner cap of the fuse mainly because of its excellent electrical conductivity, thermal conductivity and corrosion resistance, while copper is used as the outer cap mainly because of its softness and good processing performance. This design enables the fuse to work efficiently and safely under overload or short circuit conditions, ensuring the safety of equipment and users.