Stack height and board-to-board spacing flexibility
The mated stack height range of 31.00 mm to 32.50 mm gives the board layout engineer a tolerance band for mezzanine spacing. The insulation height of 0.850" (21.59 mm) and post length of 0.150" (3.81 mm) define the z-height budget for component clearance on the secondary side.
The closest functional alternative within the Dynamic D-3200 family is the 1-1871673-2, a 4-position, dual-row, right-angle header on a 2.50 mm pitch with tin-plated mating contacts. The 2-178136-2 offers a wider 5.08 mm pitch for higher voltage spacing (600 V vs 250 VAC/DC) and gold mating finish for more mating cycles, but trades position count and board-space density.