The 1-1827876-4: The 0.098-inch (2.50mm) pitch and 0.130-inch (3.30mm) row spacing match the standard D-1200 footprint for board-to-board stacking or wire-to-board cable assemblies.
Board lock and shroud keep the connection secure
The 4-wall shrouded housing and detent lock prevent mis-mating and hold the cable plug in place under vibration.
The closest peer in the Dynamic D-1200 series is the 1-1871673-2, which shares the same 2.50mm pitch, right-angle orientation, board lock, and shrouded housing. The key difference is circuit count: 8 positions here versus 4 on the sibling. The 1-1871673-2 also uses tin-on-tin contacts (31.5 µin) instead of the gold-mating finish on this part, so it is suited for fewer mating cycles or cost-sensitive builds.