What This Connector Does in the Board Stack
The TE 2-5177986-2 is a 60-position plug from the Free Height (FH) series, designed for parallel board-to-board mezzanine connections. The 0.80 mm pitch keeps the footprint compact for dense routing, while the dual-row arrangement gives 60 circuits in a board area that a single-row 0.80 mm pitch connector would need nearly double the length to cover.
Stacking Heights and Board Spacing Flexibility
That range covers the common mezzanine gaps — from a tight 7 mm stack for compact handheld gear up to 19 mm for boards that need airflow clearance or component keep-out zones underneath. The closest supported heights are 7 mm and 11 mm.