What this 2-pin header does that a plain pin strip won't
Rated 3A per contact at 100V with tin-on-tin plating — adequate for signal and low-power circuits, though the tin finish limits mating cycles compared to gold.
Termination and mounting options
The through-hole termination is listed as both press-fit and solder — the press-fit option suits a solderless backplane assembly, while the solder tail gives a conventional wave-solder joint.
The B03B-PNISK-1A shares the same 2.00mm pitch, 3A rating, latch lock, and 12.25mm mated stack height but adds a third position.