0.80mm Stack Height, 0.35mm Pitch — the Mezzanine Fit
The Hirose BM23PF0.8-64DS-0.35V(51) is a 64-position receptacle from the BM23PF series, designed for board-to-board mezzanine stacking at a fixed 0.80mm mated height. Gold-plated contacts with 1.97µin thickness on the mating surface suit signal-level interconnects where corrosion resistance matters more than cycle life.
Mating Half and Stack Height Pairing
This receptacle mates with the BM23PF0.8-64DP-0.35V(51) header — same 0.35mm pitch, same 64-position count, but a 0.63mm header height against the 0.80mm receptacle. The mated stack height is the sum of the two: 0.80mm receptacle plus 0.63mm header equals the 0.80mm stack height listed for the pair. If the board-to-board gap in your assembly is not exactly 0.80mm, this pair does not fit — no shimming, no alternate height from the same series. The 40-position sibling (BM23PF0.8-40DS-0.35V(51)) shares the same 0.80mm receptacle height and 0.35mm pitch, so a position-count change keeps the z-axis budget identical.