Board-to-board receptacle, 4 positions, 2.54 mm pitch
The 71609-402LF is the 4-circuit member of the Amphenol ICC (FCI) Dubox board-to-board receptacle line, a dual-row female socket with a 0.100" (2.54mm) pitch. Tin-plated mating contacts carry the signal path; the surface-mount right-angle orientation suits board-edge placement where the receptacle sits parallel to the PCB.