The FCI 75844-115-72LF is a 72-position unshrouded breakaway header from the BERGSTIK® series, built on the standard 0.100" (2.54mm) pitch that has been a workhorse for board-to-board and cable interconnects for decades. This is the fully loaded, 2-row version — all 72 positions are populated, so the BOM line matches the pin count one-to-one.
The 0.100" pitch and 0.100" row spacing mean this header drops onto a standard 0.100" grid — the same footprint as legacy BergStik, Samtec, and 3M headers. No board respin needed if you're replacing a similar part. The unshrouded design means there's no polarization key — the mating receptacle relies on the board layout for alignment, so confirm the mating half's orientation before you commit the BOM.