What types of RJ45 connector plating are available?

A. RJ45 connector plating can be divided into which kinds? (1) for general application scenarios, RJ45 connector tin is the most common, because tin is cheaper, but the texture of tin is softer, in order to ensure good contact, the need for higher contact force (at least 100 grams), the number of insertion and extraction is generally lower, can only play a simple protective anti-corrosion effect, the operating temperature is relatively low, the working temperature of the tin-plated brass or bronze can be up to 110 ℃, copper tin-plated can be reach 190 ℃. The general need for gold-plated, mainly for high insertion and extraction times of the RJ45 connector. For higher operating temperatures, the need for other plating, such as nickel-plated copper applications up to 340 degrees, brass or bronze nickel-plated up to 250 ℃. (2) for high reliability requirements of small signals, requires small contact force application scenarios, RJ45 connectors are generally used in gold-plated, gold is the most ideal plating material, has excellent electrical and thermal conductivity. In fact it is corrosion resistant in any environment. Due to these advantages, the main plating in connectors for applications requiring high reliability is gold, but the cost of gold is high. Nickel is generally used as a base layer for gold plating, and most of the steel contacts are nickel plated (copper plating is necessary first). Palladium's conductivity is poorer than gold, and in some limited scope cases most use palladium instead of gold plating. Compared with gold, palladium has high resistance, low heat transfer and poor corrosion resistance, but has an advantage in friction resistance. Palladium-nickel alloys (80~20) are generally used in connector terminals. At present, the price of gold continues to rise, and more and more products are plated with palladium-nickel alloy. Silver-plated contacts have very good electrical conductivity, but silver is easy to oxidize, so only in special circumstances to choose. (3) out of corrosion prevention, improve the electrical properties of the connection, reduce temperature rise and other considerations, now the RJ45 connector basically need to be plated. Not only that, plating can also prevent metal oxidation (such as corrosion), to improve wear resistance, electrical conductivity, reflectivity and enhance the role of aesthetics. In some high-current special applications have seen not to do plating, but has been very rare.

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