The Hirose BM28N0.6-6DP/2-0.35V(51) is a 6-position header from the BM28 series, designed for board-to-board mezzanine stacking at a 0.6 mm mated height.
Board Layout and Stacking Height
With a 0.6 mm mated stacking height and 0.018" (0.46 mm) height above the board, this connector fits into tight z-axis budgets where every tenth of a millimeter counts. The 0.35 mm pitch demands precise PCB layout — the footprint must match the Hirose recommended land pattern to avoid solder bridging between adjacent pads. The solder retention feature anchors the part during reflow, preventing tombstoning and maintaining alignment across the 6 positions.
For a permanent board-stack application where the connector mates once during manufacturing, this plating grade is adequate. If the design requires frequent board separation, a thicker gold option in the BM28 family would be worth evaluating.