The 5-102203-2: It is a shrouded 4-wall header with male square pins, through-hole solder termination, and a push-pull fastening type.
The 100.0 µin tin on the solder tail is standard for through-hole wave-solder processes — no special plating needed for the joint. The 3 A rating is per contact at 25°C; derate above that per the AMPMODU Mod II derating curve.
