The 3-1445093-0: The 3.00 mm pitch on this 10-position single-row header sets the board footprint and the per-contact current ceiling — at the rated current, temperature rise stays within the polyamide housing limit. The 0.125" (3.18 mm) post length gives enough solder-joint standoff for wave-solder cleaning.
Tin on the post keeps the solder-joint cost down without compromising the signal path.
