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0821-1A1T-43-F Single Port RJ45 Integrated USB 2.0 Computer connector

Although the distinction of RJ connector product types is a bit confusing, from a technical point of view, there are only two basic ways to distinguish connector product categories: ①According to the shape and structure: round and rectangular (cross-section), ②According to the operating frequency: low frequency and High frequency (with 3MHz as the boundary).
According to the above distinction, the coaxial connector is classified as round, and the printed circuit connector is classified as rectangular (historically, the printed circuit connector is indeed separated from the rectangular connector), and it is now popular The cross section of the rectangular connector is trapezoidal, which is approximately rectangular. It is also fundamentally common to distinguish between low frequency and high frequency and the frequency of radio waves with 3MHz as the boundary.
As for other types, many different types can be distinguished according to use, installation method, special structure, special function, etc., and they often appear in publications and manufacturer’s promotional materials, but generally only for the purpose of highlighting a certain feature and use, the basic classification is still Does not exceed the above-mentioned distinction criteria.