0.40mm Pitch, 48-Position Shielded Plug for Dense Mezzanine Stacking
The Hirose DF40GB-48DP-0.4V(58) is a 48-position plug from the DF40 series, designed for board-to-board mezzanine connections where signal density and a low z-height budget are the constraints. The 0.016" (0.40mm) pitch packs 48 circuits into a compact footprint, and the shielded outer shroud contacts help contain EMI in tight digital modules — think camera modules, display interconnects, or compact compute stacks. Gold contact finish is standard across the DF40GB variants, giving a corrosion-resistant mating surface suited for repeated assembly in consumer or portable equipment.
Mated Stack Heights and Board Fit
This plug sits 0.045" (1.14mm) above the board after reflow. The datasheet lists mated stacking heights of 1.5mm and 3mm — the actual height depends on which matching DF40 receptacle you pair it with. For a 1.5mm total stack, the board-to-board gap is tight; verify the keep-out zone on the opposing board clears the tallest component. The 0.40mm pitch means trace routing between pads is possible with standard PCB fab capabilities, but the fan-out vias need careful placement to avoid shorting between adjacent pads.