The 2-179277-5: This is a 4-position, single-row header from the TE Dynamic D-3200 series, on a 5.08mm pitch that suits power distribution and industrial control wiring.
Board footprint and routing constraints
The 5.08mm pitch is wider than typical signal headers, so the PCB layout has room for wider traces or higher copper weight between pins — useful when the header feeds a power bus or motor drive. The right-angle orientation means the solder tails exit the board edge, not the top. The post length is 0.150" (3.81mm), which dictates the through-hole drill depth and the solder fillet profile on the bottom side. The board lock adds two additional plated through-holes beyond the signal pins — confirm the PCB footprint includes these anchor points before layout sign-off.