The 1734829-7: Each contact is rated 1 A at 125 V, which puts this firmly in signal-level duty – sensor inputs, low-power control lines, or data interfaces.
Board Fit and Harness Routing
Right-angle through-hole termination means the header sits flush against the board edge, with the post length 0.091 inch (2.30 mm) – standard for a 1.6 mm PCB, though you'll want to confirm the solder fillet height against your wave-solder profile. The insulation height is 0.126 inch (3.20 mm), so the mated receptacle sits low; good for enclosures with tight lid clearance.
Tin-on-tin contacts are reliable for a few dozen mating cycles; if you expect frequent field reconnections, switch to a gold-plated version in the HPI family.