Which different coatings should the electronic connector use for different applications? In response to this problem, Xiao Bian summarized the following three types of use environments when the following electronic connectors were selected for plating:

For general applications, tin plating is the most common, because tin is cheaper, but the texture of tin is softer. To ensure good contact, high contact force (at least 100 grams) is required, and the number of insertions and removals is generally low. It has a simple protective anti-corrosion effect, low working temperature, brass or bronze tin plating working temperature can reach 110 ° C, steel tin plating can reach 190 ° C. For high insertion and removal times, gold plating is generally required. For higher operating temperatures, other coatings are required, such as 340 degrees for copper nickel plating and 250 °C for brass or bronze.

For small signal applications with high reliability requirements, applications requiring small contact forces are generally gold plated, while the corrosion resistance of gold is also outstanding. Nickel is generally used as the base layer for gold plating, and most of the steel contacts are nickel plated (copper plating is required). The conductivity of palladium is worse than that of gold, and it is often used in place of electroplated gold in certain limited ranges. At present, the price of gold continues to rise, and the products of palladium-plated nickel alloys are also increasing. Silver-plated contacts have very good electrical conductivity, but silver is easily oxidized and is therefore only used in special cases.

Due to corrosion prevention, improved connection performance, and lower temperature rise, the current connectors basically require electroplating. In some special applications of high current, it is not seen to be electroplated, but it is very rare.

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