Pitch, Plating, and Temperature Ceiling
The 1734261-7: At 1.25 mm pitch, the board footprint is compact — each circuit occupies roughly half the width of a 2.54 mm header, which matters when routing traces between pads on a two-layer board.
Position Count Comparison Across the HPI Family
Within the same HPI series and identical form factor, the 1734261-3 offers 3 positions and the 1734261-2 offers 2 positions — all sharing the 1.25 mm pitch, SMT right-angle mounting, tin plating, and 1 A rating. The 1734261-7 at 7 positions is the higher-circuit-count option for designs needing more I/O in the same footprint. The 1734260-8 is a vertical SMT header (not right-angle) with 8 positions and a 3-wall shroud, plus a thicker 150.0 µin tin mating finish — a different orientation for applications where the cable exits perpendicular to the board.