Board-to-Board Stack-Up and Footprint Fit
The 5-104652-4: This 40-position, dual-row receptacle sits on a 1.27 mm pitch with 1.27 mm row spacing — the tight grid packs 40 circuits into a board footprint roughly 25.4 mm by 5.1 mm. The mated stack height options of 6.35 mm, 8.13 mm, or 9.91 mm let you dial in the board-to-board air gap for mezzanine or parallel stacking.
Housing and Temperature Range
For high-vibration environments, verify that the mating header has a corresponding retention feature.