The Hirose DF9-41S-1V(32) is a 41-position receptacle with outer shroud contacts from the DF9 series, a 1.00 mm pitch board-to-board interconnect family. The 0.039" (1.00 mm) pitch and 2-row layout suit dense mezzanine applications where board real estate is tight — think portable electronics, LCD driver boards, or internal module interconnects where the z-height budget is under 5 mm.
The 41 positions match a 41-circuit BOM line exactly; the 2-row arrangement keeps the connector width manageable at about 10 mm. If your design sees frequent reconnection or a corrosive environment, the gold-plated sibling DF9-41S-1V(69) with 8.00 µin gold is the better call — same footprint, same stacking height, just a different contact metallurgy.
This receptacle mates with the DF9 series header, specifically the DF9-41P-1V(32) — a 41-position, 2-row, tin-plated header with center strip contacts, same 1.00 mm pitch and 4.3 mm stacking height. The header is also surface-mount with board guide and solder retention. Termination is SMT only; no through-hole option exists in this series. The tin-on-tin contact interface is adequate for static or infrequent mating — expect reliable contact resistance under 50 mOhm per circuit at first mate, but derate mating cycles to below 50 for consistent performance.