The DF12C-20DS-0.5V(81): This is a Hirose DF12C series receptacle with 20 positions arranged in two rows at 0.50 mm pitch — the footprint matches standard DF12C headers for board-to-board mezzanine stacking. Gold-plated center strip contacts (8.00 µin finish) suit repeated mating cycles in compact consumer or industrial electronics where signal integrity matters more than raw current. Mated stacking heights of 3.5 mm, 4 mm, or 5 mm let you choose the board spacing without changing the connector footprint — useful when the same PCB pair fits multiple enclosures.
Sourcing this obsolete part
Fit check for layout and mating
Confirm the header's stacking height matches your required board spacing.