The Hirose FX6-50S-0.8SV(71) is a 50-position receptacle with center strip contacts, part of the FX6 series of board-to-board mezzanine connectors. It uses a 0.80mm pitch and two rows, giving a dense signal path for parallel PCB stacking.
Mated Stack Heights and Board Layout
This receptacle supports mated stacking heights of 5mm, 6mm, and 7mm — the height above board is 4.00mm, so the matching header height determines the total stack. The 0.80mm pitch demands a controlled-impedance footprint if the signal edges are fast; the board designer should route traces between the pads with a ground plane reference to keep crosstalk within budget. Surface mount termination means the part is placed by pick-and-place and reflowed — no through-hole solder or press-fit tooling required.