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H5020NL 10/100/1000Base-t Eight port Lan Transformer with Magnetics 

The basic structure of the connector：
1. Contacts are the core parts of the connector to complete the electrical connection function. Generally, a touch pair is composed of a male touch piece and a female touch piece, and the electrical connection is completed through the insertion of the female and yang touch pieces.
The positive touch part is a rigid part, and its shape is cylindrical (round pin), square cylinder (square pin) or flat (insert piece). The positive touch element is generally made of brass or phosphor bronze.
The female touch piece is the socket, which is the key part of the touch. It relies on the elastic structure to produce elastic deformation when it is inserted with the pin to generate elastic force to form a tight touch with the positive touch piece, and complete the connection. There are many types of jack structures, including cylindrical (split, necking), tuning fork, cantilever type (longitudinal slot), folding type (longitudinal slot, 9-shaped), box-shaped (square jack) And the hyperboloid wire spring jack and so on.