The Amphenol FCI 61082-101402LF is a 100-position receptacle from the BergStak® 0.80mm series, built for high-density board-to-board mezzanine stacking. It uses a dual-row layout on a 0.031" (0.80mm) pitch, which keeps the board footprint tight — you're routing 50 pairs per row, so the trace escape under the body needs care. The connector sits 0.146" (3.70mm) above the board and mates with a BergStak header to achieve stacking heights of 5mm, 6mm, 7mm, or 8mm. That range means one receptacle covers several board-spacing requirements in the same design.
Stacking Height Flexibility
The mated stacking heights span 5mm, 6mm, 7mm, and 8mm — four options from one receptacle. That's the main selection parameter for a mezzanine interconnect: pick the header height that matches your board gap, and the 61082-101402LF stays the same. The 0.146" (3.70mm) board profile is fixed, so the header side carries the height variation. Compare with the 61082-102402LF, which is the same 100-position receptacle but at a 0.303" (7.70mm) height — that part is for a taller stack-up where you want the receptacle itself to stand higher off the board. For most designs, the standard 3.70mm version gives you the widest header selection.