What are the advantages of gold contacts over tin contacts in the connection of connectors?

In a connector connection, whether it is through a board-to-board connection or a wire-to-board connection, there is a point of contact. The contact may be small and not easy on the eye, but this insignificant contact is one of the most important components of any connector. Speaking of contacts, it is necessary to talk about the contacts of the plating, in a metal on the deposition of another layer of metal to achieve the protection of the connector conductivity. At present, the coating material for gold, silver, tin, the use of more common for gold and tin, corresponding to the connection of the contacts, we distinguish between gold contacts and tin contacts. Gold as a precious metal, will not react with other materials, and gold in the atmosphere will not oxidize or discoloration, in harsh environments, but also long-term durability, very suitable for contact plating; silver-plated with better electrical conductivity, but the chemical properties of silver is unstable, prone to produce silver sulfide, which affects the contact of contact parts of the contact discoloration, welding, and other properties; the general connector will be used to plating of tin, tin, tin is cheaper, has anti-corrosion features. Cheap, anti-corrosion function, the texture of tin is relatively soft, conducive to coordination between the plug and socket, but because of the texture is relatively soft, many times after insertion and extraction, easy to make the plating surface wear and tear, resulting in the deformation of the contact end, up to the design of the contact force. Therefore, gold contacts have the following three advantages: 1. Gold plating can improve the corrosion resistance of the contacts, which means that they are more suitable for use in harsh environments. 2. These contacts are more resistant to insertion and removal and less prone to wear and tear, so in the case of frequent need for insertion and removal of the gold contacts is a better choice. 3. The contact resistance of the gold contacts is lower. Therefore, compared to tin contacts, gold contacts have better continuity and thus are in low voltage circuits (5V and below).-4、About Evergrande Electronic Products Network platform related to the introduction and sales of products briefly: Evergrande Electronic Products Network - a professional agent / production / sales of a variety of {connectors | wiring harness | wire and cable products }; if you have a related [connectors | wiring harness | wire and cable products] purchasing / sourcing needs or would like to buy / to understand what connectors | harness | wire and cable products we can provide solutions, please contact the following Division I business personnel; If you have related [connectors | wire harness | wire and cable products] sales / resources and promotion needs, please click on the "¡¡ Business Cooperation ←" with the person to discuss!