0.50mm Pitch, 50-Position Mezzanine Receptacle
The Hirose DF12NB(3.0)-50DS-0.5V(51) is a 50-position receptacle from the DF12 series, a board-to-board mezzanine connector family built for dense parallel stacking. At a 0.020" (0.50mm) pitch with two rows of gold-plated center strip contacts, it packs 50 signal paths into a compact footprint — the kind of density you need when routing a bus between stacked PCBs in a portable device or a compact module. The mated stacking height is 3mm, and the connector sits 0.087" (2.20mm) above the board surface after reflow.
50 vs 40 Positions — Same Footprint, Different Channel Count
The DF12NB(3.0)-50DS-0.5V(51) carries 50 positions against the 40 of the DF12NB(3.0)-40DS-0.5V(51) at the same 0.020" (0.50mm) pitch and 0.087" (2.20mm) height above board. Both are active, gold-plated receptacles with the same 3mm mated stacking height. No difference in footprint class; the extra 10 positions extend the connector body length proportionally.