0.50mm Pitch Mezzanine Receptacle — 10 Positions, 3mm Stack
The Hirose DF12A(3.0)-10DS-0.5V(81) is a 10-position, 2-row receptacle from the DF12 series of board-to-board mezzanine connectors. Surface-mount termination on both rows keeps the footprint compact, but the 0.50mm pitch means the solder paste stencil and reflow profile need to be dialed in for consistent fillet formation — tombstoning is a risk if the pad geometry isn't matched to the land pattern in the Hirose application note.
The DF12A(3.0)-10DS-0.5V(81) is listed as Obsolete. No official successor part number is on record from Hirose for this exact 10-position, 3mm stacking height variant.
The 3mm mated stacking height is the z-height budget between the two boards; the header's own height above board plus the receptacle's height above board (0.087" / 2.20mm for the receptacle) sum to the 3mm total when mated. Gold plating at 8.00µin is a mid-grade finish — it handles the mating cycles typical of a single production build and occasional rework, but if the design calls for frequent board separation (test fixtures, modular assemblies), a thicker gold option in the DF12 family would be worth the swap.