Board-Stacking Connector for Tight Pitch Mezzanine Designs
The TE Connectivity 1-5177986-5 is a 120-position plug from the Free Height (FH) series, built for parallel board-to-board stacking at a 0.80 mm pitch. It's designed for surface-mount soldering, with a board guide feature that helps align the plug during pick-and-place and reflow. The mated stack height can be 6 mm, 10 mm, 14 mm, or 18 mm — one connector part number covers four different board spacing requirements, which simplifies inventory if your design uses multiple stack heights.
At 0.80 mm pitch and 120 positions, this plug provides 120 circuits in a 2-row layout. The gold plating on the 1-5177986-5 is 8.00 µ" thick, while the 1-120532-2 carries 50.0 µ" gold. That's a real difference in mating cycle life — the thicker plating on the sibling is better for applications that see frequent board swaps or field rework. For a one-time assembly in a controlled environment, the 8.00 µ" gold is adequate.