What is a Connector and how many categories are there?

Connectors are also called connectors, which generally refer to electrical connectors. That is, a device that connects two active devices, carrying current or a signal.
The male end and the female end can transmit information or current after contact, also called a connector.

Although the division of connector product types is somewhat confusing, from a technical point of view, there are only two basic division methods for connector product categories: ① According to the shape structure: circular and rectangular (cross-section), ② According to the operating frequency: low frequency and high frequency (bounded by 3MHz).
According to the above division, the coaxial connector belongs to the circle, and the printed circuit connector belongs to the rectangle (from a historical point of view, the printed circuit connector is indeed separated from the rectangular connector into a class), and the current popular The cross section of the rectangular connector is trapezoidal, which is approximately rectangular. The division of low frequency and high frequency with 3MHz as the boundary is basically the same as the frequency division of radio waves.
As for other types, they can be divided into many different types according to use, installation method, special structure, special performance, etc., and often appear in publications and manufacturer's publicity materials, but generally only to highlight a certain feature and use, the basic classification is still The above-mentioned division principle is not exceeded.
Considering the technical development and actual situation of connectors, from their versatility and related technical standards, connectors can be divided into the following categories (categories): ① low-frequency circular connectors; ② rectangular connectors; ③ printed circuits Connector; ④ RF connector; ⑤ Optical fiber connector.

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