SMT RJ45 Connector Material Selection

General soldering process, because the plug-in RJ45 connector is completed using wave soldering technology, while the SMT RJ45 connector is completed using reflow soldering technology. Therefore, SMT RJ45 connectors are subjected to higher temperatures than plug-in connectors.

Wave soldering requires the pins of the plug-in components to pass through the PCB, and the lead portion that passes through the board at the time of soldering is accomplished by melting the liquid surface of the solder. In the wave soldering process, because of the printed circuit board to separate the solder joint and hard plastic insulator, so only through the board circuit of the metal pin part of the contact with the high temperature of the solder liquid surface. In turn, the printed circuit board separates most of the heat from the part. Therefore, the perforated parts do not require high temperature resistant special raw materials, can still achieve the purpose of welding. While welding SMT RJ45 connectors are different, SMT RJ45JACK parts are completed through the high-temperature furnace. Reflow oven. Soldering SMT RJ45 connectors throughout the circuit board to pass through the high-temperature furnace, and last long enough to make the solder melted after connecting with the SMT pins. The process requires the socket to be subjected to high temperatures up to 260°C to pass the SMT part through the high temperature oven. Oven temperatures that are too hot or too long can cause metal compounds to crack or damage circuit boards and some sensitive components. In order to ensure that the SMT RJ45 connector soldering process on the requirements of the components, many high temperature resistant plastic insulators into the market. For example: LCP, PPS, PCT and other plastics with high temperature resistance and plasticity. Plastic body is now fast heat dissipation, moisture resistance, and easy to injection molding and other aspects. Of particular importance, these plastic insulators have exceptional stability, low warpage, and can be injection molded into tiny shapes, which reduces the size of the connector and thus aids in the distribution of heat during the soldering process. Conventional fiber polyethylene materials are non-temperature resistant plastic insulators that melt when passed through high temperature ovens and are therefore used in perforated connectors and only in wave soldering processes.

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