0.50 mm Pitch, 50-Position Mezzanine Receptacle — DF12 Series
The Hirose DF12B(3.0)-50DS-0.5V(86) is a 50-position receptacle with center strip contacts from the DF12 series, designed for board-to-board mezzanine stacking. It uses a 0.020" (0.50mm) pitch in a dual-row layout, with a mated stacking height of 3mm — a fixed dimension that sets the z-height budget between parallel PCBs.
What the 3 mm Stack Height and Solder Retention Mean for Assembly
The 3mm mated stacking height is a fixed value — not adjustable — so the board-to-board spacing is locked once this connector is specified. The solder retention features are integrated into the SMT footprint to prevent the connector from lifting off the pad during reflow or under mechanical stress, which is a practical advantage for high-density mezzanine stacks where rework access is limited. The 0.50mm pitch requires careful PCB layout to maintain routing clearance between pads.