0.60mm Pitch Mezzanine Header, 80 Positions, 10.85mm Board Height
The header stands 0.427" (10.85mm) above the board and supports mated stacking heights of 11mm and 16mm, giving two z-height options from a single board footprint.
Height Variant — FX8C-80P-SV4(92) at 8.45mm
The closest functional sibling is the FX8C-80P-SV4(92), which shares the same 0.60mm pitch, 80 positions, gold plating, and dual-row layout but stands 0.333" (8.45mm) above the board. That 2.4mm difference in board height shifts the mated stack range downward — the SV4 variant suits tighter z-height envelopes. Both are active parts, so the choice comes down to the stack height your enclosure allows. No other spec differs between them.