Hirose BM10NB(0.8)-10DS-0.4V(51) — 10-Position, 0.40mm Pitch, 0.80mm Stack Height
The Hirose BM10NB(0.8)-10DS-0.4V(51) is a 10-position receptacle with center strip contacts from the BM10 series, designed for board-to-board mezzanine stacking at a fixed 0.80mm mated height. The solder retention feature adds a mechanical lock to the SMT pads — that extra hold keeps the joint from lifting under the shear stress of a drop or vibration, which is why you see this feature on connectors destined for compact consumer electronics where the board isn't screwed down.
This 10-position member is the smallest circuit-count option in the BM10NB(0.8) subfamily.