Board-to-Board Mezzanine Plug, 80 Positions, 0.80mm Pitch
It uses a 0.031" (0.80mm) pitch dual-row contact layout with center strip contacts, and terminates via surface mount for reflow assembly. The mated stack height is 8mm, set by the 0.309" (7.85mm) height above board. A built-in board guide aids alignment during board stacking, protecting the fine-pitch contacts from shear damage.
The 8mm mated stack height is the vertical clearance between the two parallel PCBs when this plug is mated with its matching receptacle. At 0.80mm pitch, the routing density is high — two signal traces can typically pass between pads on a standard PCB layer. The board guide on the plug body helps the assembler align the boards before the contacts engage, which matters at this pitch where a misalignment of a few tenths of a millimeter can bend contacts.
For a single-mate permanent stack, the gold is over-specified but adds no downside.
The 1-120532-2 is a different pitch (1.00mm) and position count (84), so it is not a functional equivalent for a 0.80mm footprint.