News - Electrical contact components and electrical contact material

Electrical contact materials are very critical contact elements in electrical switches and instruments. The increasing requirements for automation level and sensitivity in low-voltage power distribution and control systems, the development of large-capacity ultra-high voltage between high-voltage transmission and transformation, and even the transformation and upgrading of electronic industrial products all require continuous innovation and upgrading of electrical contact material research. Electrical contact materials include electrical contact materials for switching and sliding contact materials that accompany mechanical sliding while in electrical contact. As far as the specific electrical contact industry is concerned, customers’ requirements for electrical contacts are increasing and higher, especially since the demand for cost reduction is increasing year by year. Traditional medium and low voltage electrical contact materials use precious metal silver as the main component, making the electrical contact industry one with the largest silver consumption.

Material selection has an important impact on its performance and life. The material of the contact should have good conductivity, wear resistance, and corrosion resistance. Silver is a commonly used contact material with excellent conductivity and high thermal conductivity, but it is easily oxidized and worn. Copper has good conductivity and mechanical properties, but is easily affected by oxidation and sulfidation. Gold has good corrosion resistance, but its cost is relatively high, and it is generally used in high-end electronic equipment.