3.5mm Stack Height, 40 Positions — the DF12 Mezzanine Header
The Hirose DF12D(3.5)40DP0.5V80 is a 40-position, dual-row header from the DF12 series, designed for board-to-board mezzanine stacking at a 3.5mm mated height. The 0.50mm pitch packs the 40 circuits into a compact footprint — typical for space-constrained handheld or portable equipment where the mezzanine card sits close to the main board. Gold-plated contacts on the mating interface handle repeated connect cycles without fretting corrosion, and the outer shroud contacts provide alignment and strain relief during mating. The surface-mount termination suits automated pick-and-place assembly, though the bulk packaging means no tape-and-reel feed for high-volume lines — plan for tray or tube handling.
Obsolete — Sourcing the DF12D(3.5)40DP0.5V80
That means no active factory production — the only channel is surplus inventory or broker stock.
0.50mm Pitch, 40 Circuits — Board Layout Fit
The 0.50mm pitch drives a dense board footprint — each row of 20 contacts sits on that tight centerline, which means trace routing between pads is narrow and requires careful impedance control for high-speed signals. The 3.5mm mated stack height is fixed by the connector body; the mating receptacle (a Hirose DF12 series female) must match this height exactly — swapping to a 3.0mm or 4.0mm stack variant changes the mezzanine spacing and may not align with the board keep-out zones.