RJ Press Fit - Compliant Pin


Xmultiple's Engineering Department

Xmultiple press-fit connectors make their connection to a printed circuit board by pressing a pin into a plated-through hole in the printed circuit board. The main feature is the fact that the cross-section of the pin has a larger diameter than the plated-through hole in the PCB. When the pin is pressed into the hole, the excess material must be taken up either by deformation of the hole in the PCB or of the pin. Deformation of the pin (known as "Compliant pin") has become established in the market for press-fit connectors. Compliant pin technology is a solder-free assembly process. The press fit pins are inserted to a ˇ§compliantˇ¨ section of the board that is slightly larger than the plated PCB hole. When the pin is inserted, the compliant sectionis compressed and this is what provides the connection between the PCB and the pin.

Press Fit connectors have some advantages:

1. Flexible response of the press-fit zone on the pin, achieves minimal strain on the plated-through hole.

2. A larger hole tolerance of the plated-through drill holes is permissible in the printed circuit boards.

3. Less press-fit forces are required, thus undesired side effects are reduced
Multiple press-fitting of contacts into the same PCB drill hole is possible.

The suggested drill hole size for press fit connectors is listed on each drawing for your specific connector for your requirment. The drawing below is for XMV press fit for vertical mount RJ45 connectors. The drawing below contains the drill hole size and tolerance so you can determine the proper plating for the PCB. Our engineers do not advise the plating in the hole as this is normally determined by the customer layout based on the drawing and samples.

Tools and Presses for Press Fit Connectors

Press Fit Connectors Application Note


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