The Hirose FX2-20P-1.27DSL(71) is a 20-position board-to-board plug from the FX2 series, terminated through-hole at a right angle. It uses a center strip contact arrangement across two rows on a 1.27 mm pitch — a pitch that balances routing density with enough room for reliable solder joints on a standard PCB. The gold contact finish suits repeated mating cycles, and the board lock feature anchors the connector to the board during reflow and resists shear forces from the mating cable assembly. This is the plug half of a mezzanine interconnect; it mates with the corresponding FX2 series receptacle to create a parallel board stack.
What mates with this FX2 plug?
This plug mates with a Hirose FX2 series receptacle of the same 20-position count and 1.27 mm pitch. The board lock on this plug holds it in place during the soldering process, reducing the risk of skew that can misalign the two halves in a mezzanine stack.
Board lock and mounting detail
The board lock is a metal retention feature that snaps into a plated through-hole on the PCB. It holds the connector in position during wave or hand soldering and adds mechanical resistance to the joint once the board is in service — useful in applications where the mated pair sees vibration or the cable is frequently disconnected.