Board-to-Board Plug for Tight Two-Wire Links
Tin-plated contacts are rated 3A per circuit at 300V, which suits internal signal or low-current power duty inside an enclosure.
The 4.00mm pitch is the key board-layout dimension — it sets the pad spacing for the two SMT solder tails. This is wider than the 2.00 mm or 2.54 mm pitch common on dense signal connectors, so the footprint is forgiving for hand-soldering or inspection. The 2-position count means the plug occupies a narrow strip on the board edge, leaving room for other components.