The 0.039" (1.00mm) pitch and 2-row layout pack 41 circuits into a compact footprint for high-density signal interconnects. Tin-plated contacts keep cost down for applications where mating cycles are limited — think internal harnesses in consumer electronics, LCD panels, or portable devices where the connector mates once and stays.
The mated stacking height of 4.3mm is fixed by the header and its mating receptacle — no adjustment after the board is laid out. The header itself stands 0.130" (3.30mm) above the board surface, so the keep-out zone on the PCB is tight. For a 41-position connector at 1.00mm pitch, the footprint consumes about 20.5mm × 5mm of board real estate per row — plan routing channels accordingly.
This header mates with the DF9 series receptacle, specifically the DF9B-41S-1V(32) — same 41 positions, same 1.00mm pitch, same 4.3mm stacking height. The receptacle uses outer shroud contacts that wrap around the header's center strip contacts. No keying or polarization — the housing is symmetrical, so alignment depends on the PCB layout.