It uses a 5.08 mm pitch, which gives you room to route moderate power alongside signal without crowding the board. A detent lock on the housing gives you an audible click when the connector is fully seated — you should hear it lock.
Board fit and mechanical anchoring
This header mounts through-hole with a 0.150" (3.81 mm) post length, and includes board locks that anchor it to the PCB during wave soldering. The board lock takes the shear force off the signal pins when the cable is tugged or the equipment is vibrated — if it backs out, it's scrap, so those locks matter. The mated stack height range is 31.00 mm to 32.50 mm, which gives you some tolerance in the enclosure's z-height budget. The row spacing is 0.300" (7.62 mm), so the dual-row footprint is wider than a single-row part of the same pitch.
Voltage rating is 600 V, which suits this part for power distribution within control panels where line voltages are 480 VAC or lower.
That part is better for low-voltage signal duty (250 VAC/DC) where you need a right-angle exit from the board. The 3-917657-2 gives you 10 positions at 5.08 mm pitch with gold mating contacts — a different density and voltage class entirely.