It uses a dual-row, 0.80mm pitch layout with center strip contacts — the male half that mates with a Free Height receptacle. The 0.191" (4.85mm) height above board, combined with the listed mated stacking heights of 5mm, 9mm, 13mm, and 17mm, means the same plug can be paired with different receptacles to span a range of board-spacing requirements.
Mating and Stacking
The 5177986-3 mates with a Free Height (FH) receptacle — the female counterpart with the same 0.80mm pitch and dual-row configuration. The mated stacking heights of 5mm, 9mm, 13mm, and 17mm are achieved by selecting the appropriate receptacle height variant; the plug height (4.85mm) stays constant. The board guide on the plug aligns the pair during board-to-board assembly, and the gold-plated contacts are rated for a standard number of mating cycles typical of this class.