Dubox™ Dual-Row Receptacle for Board-to-Board Stacking
The 71991-309LF: The push-pull fastening type allows tool-less unmating, which is typical for card-edge or mezzanine connectors where access is limited.
Board Fit and Stack Height Budget
This receptacle accepts a mating header with 0.100" pitch and 0.025" square pins. The 0.118" (3.00mm) solder tail length suits standard 1.6mm-thick PCBs — the tail protrudes below the board for wave-solder fillet formation. The 11.04mm mated stack height is a fixed value — it determines the spacing between the two PCBs in a mezzanine configuration. For a given enclosure z-height, subtract the board thicknesses and component keep-outs to verify clearance. The bottom or top entry style means the receptacle can be mounted on either side of the board, which helps with board orientation in multi-card cages.
It is supplied in tube packaging. The part is RoHS-compliant per the manufacturer's standard declaration.