Board-to-Board FPC Receptacle for Tight Stack Heights
The DF37NC-10DS-0.4V(51): The 0.016" (0.40mm) pitch and 0.038" (0.97mm) height above board let it fit into a 0.98mm mated stack height — that's the z-height budget for the pair, so the mating header needs to match that same stack height spec. Gold-plated contacts at 2.00µin (0.051µm) thickness handle the occasional mate cycle during production test or field swap, but this is flash plating, not heavy-duty gold for repeated reconnection.
Pitch and Position Count — Matching the BOM Line
At 10 positions and 0.40mm pitch, this receptacle matches a 10-circuit FPC or rigid-flex tail. The DF37 series also offers a 16-position variant (DF37NC-16DS-0.4V(53)) at the same 0.016" (0.40mm) pitch and 0.038" (0.97mm) height — so if the board design needs more I/O without changing the stack height or footprint pitch, that sibling is a straight scale-up. The 24-position DF37NC-24DS-0.4V(51) follows the same pattern. No change in the mated stack height across the family; the footprint just grows in length.