The Hirose FX2CA-20S-1.27DSAL(71) is a 20-position board-to-board receptacle from the FX2 series, using a 1.27 mm pitch and a two-row layout with outer shroud contacts. It is designed for parallel board stacking where the shroud provides contact protection during mating and unmating — common in internal signal interconnects for industrial controllers, test equipment, and telecom line cards where board spacing is tight.
The outer shroud contacts on the receptacle side align with the header's pin shroud.