The Hirose DF12D(4.0)40DP0.5V80 is a 40-position header from the DF12 series, designed for board-to-board mezzanine stacking. It uses outer shroud contacts in a 2-row arrangement on a tight 0.020" (0.50mm) pitch, with a mated stacking height of 4mm and a height above board of 0.130" (3.30mm). The gold-plated contacts and surface-mount termination suit it for high-density signal interconnects where repeated mating cycles and reliable contact are needed — think portable electronics, camera modules, or any compact stack-up where the board-to-board gap is tight and the pin count is high.
Board Layout and Stack-Up Fit
Mating and Termination Check
This is a surface-mount header with outer shroud contacts, intended to mate with a DF12 series receptacle of the same 40-position count and 0.50mm pitch. The 4mm stacking height is fixed by the header's own height above board and the mating receptacle's profile — the pair together defines the board-to-board gap.