Right-angle 40-position board-to-board receptacle
The 5-103911-5 is a 40-position female socket header from the AMPMODU System 50 series, configured as a right-angle through-hole receptacle for board-to-board stacking. The 0.050-inch (1.27 mm) mating pitch and 0.100-inch (2.54 mm) row spacing define the board footprint — a tight-pitch layout that keeps the routing density up on the PCB.
Right-angle orientation means the receptacle sits perpendicular to the PCB, with a 0.100-inch (2.54 mm) post length for through-hole soldering. A built-in board guide on the housing helps align the pair during assembly — takes the shear off the signal pins.