The 57102-S02-02LF: The 0.079" mating contact length provides a short engagement depth – the receptacle must be chosen to match this insertion depth. In a production harness that is mated a few times during test and once in the field, that gold layer will outlast the product. The 2A per-contact rating at 200V AC/DC is typical for signal-level interconnects – do not push this above 2A without checking the derating curve.
Push-Pull Fastening and Unshrouded Reality
Unshrouded with push-pull fastening – there is no latch or polarization key. The mating receptacle must supply the retention. The 0.098" post length suits standard through-hole PCB thicknesses.