Thermal protector contact
Gold Au has excellent corrosion resistance and is suitable for small loads. Due to its soft texture (Vickers hardness HV25-65), it is more prone to adhesion (joint adhesion), and the joint is prone to indentation under high contact forces.

A thermal protector is a combination of two different alloys that generate heat after passing through an electric current. Due to the different thermal expansion coefficients of the two different alloys, the alloys are bound to bend in one direction, causing the contacts to leave and cutting off electricity. What are the precautions for installing thermal protectors?