Board-Stacking Selection for the 40-Position Mezzanine
The key selection parameter here is the mated stack height: this single receptacle supports four heights — 9mm, 10mm, 11mm, and 12mm — depending on which plug height you pair it with. That means one BOM line covers multiple board-gap requirements, which simplifies inventory if your build uses different mezzanine spacings across variants.
At 0.80mm pitch, the 7-5179180-1 occupies a tighter board footprint than the 1.00mm pitch of the 1-120532-2 plug from the same family. If your layout is already routed for 0.80mm, the 1-120532-2 won't fit without a board respin — the 0.20mm pitch difference changes the pad pattern and routing channel width. The 40 positions here match a 40-signal mezzanine bus; the 84-position 1-120532-2 serves a wider data path but requires more board real estate.
Mounting and Assembly Notes
Surface-mount termination with a board guide. The guide posts align the receptacle to the PCB footprint before reflow, which is useful if you're placing it alongside other fine-pitch SMT parts. The Tape & Reel packaging suits automated pick-and-place lines; Cut Tape is available for prototype or low-volume builds.