50-Position Dual-Row Layout at 1.27 mm Pitch
The 103911-4 is a 50-position, dual-row receptacle from the AMPMODU System 50 series. The 1.27 mm (0.050-inch) mating pitch and 2.54 mm (0.100-inch) row spacing set the PCB footprint: 25 contacts per row in a staggered grid. This pitch is the tightest common spacing for this class, which means the board layout engineer must plan for fine-pitch trace escape between the through-hole posts.
