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Why 50 micron RJ45 plug?

Why 50 micron gold plated RJ45 plug?

The contact of RJ45 plug used for Ethernet cable is gold plated to maintain optimum conductivity with RJ45 jack (receptacle). There are several kinds of gold plating thickness available in the market. The lowest grade is called flash gold, and the thickness is mere 3 to 6 micron. The highest is 50 micron. 

The difference the thickness makes is the aging. Contacts of RJ45 plug are exposed to moisture in the air that causes corrosion on metal surface. Gold is well known as high conductive and non-corrosive material. Thicker gold plating better protects contact material from corrosion (thus keeps stable Ethernet connection speed) for longer years. Especially when the patch cable is used in high humidty or not-clean air environment, 50 micron gold plating is recommended.

SF Cable patch cables use 50 micron gold plated RJ45 plug.