The Hirose DF40C-24DP-0.4V(51) is a 24-position plug with outer shroud contacts from the DF40 series of fine-pitch board-to-board connectors. Gold plating on the contacts (2.00µin thickness) suits repeated mating cycles typical in handheld or modular electronics where the connector sees field service.
Stack Height Range — One Connector, Six Z-Height Options
This plug supports mated stacking heights of 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, and 4mm when paired with the matching DF40 receptacle. That range lets a single PCB layout accommodate multiple board-spacing variants by swapping only the receptacle height — useful when the same base board is stacked with different daughter cards in a product family. The 0.045" (1.14mm) height above board on this plug keeps the z-profile low enough for tight enclosures while leaving clearance for trace routing underneath.