What this 50-position 0.50mm pitch receptacle does
The DF12A-50DS-0.5V(80): This is a Hirose DF12 series receptacle with 50 positions on a 0.50mm pitch, dual-row layout, and center strip contacts — a tight-pitch mezzanine connector for board-to-board stacking. The 0.106" (2.70mm) height above board and mated stacking heights of 3.5mm, 4mm, or 5mm let you pick the board spacing, but you need to match the mating plug's stack height exactly. Gold contact finish and a board guide feature help with alignment during SMT assembly — the guide takes some shear off the signal pins when boards are mated.
No stock-holding claim; each order is a fresh sourcing check.
Mating and stacking height check
The mated stacking height is determined by the plug variant — 3.5mm, 4mm, or 5mm — so confirm the plug's stack height matches your board-to-board gap.