120-Position Mezzanine Receptacle at 0.80 mm Pitch
The 120 circuits fill a high-signal-count mezzanine link, typical for backplane or mid-plane card assemblies that need a compact, surface-mount interconnect.
Stack Height Flexibility and Board Guide
The same part number covers all four heights — the height is set by the plug variant, not the receptacle. A built-in board guide on the receptacle helps align the two boards during assembly, taking shear stress off the fine-pitch contacts before they engage.
Surface-Mount Termination and Tape-and-Reel Packaging
The 5177985-5 is a surface-mount component, terminated by reflow soldering to the PCB. No press-fit or through-hole option exists for this part.