The 77311-124-36: All 36 positions are loaded, giving the full pin count for a dense signal or I/O bus.
Gold Mating Surface and Plating Grade
Note the tin-lead finish — this part is not RoHS-compliant for lead-free assembly lines.
Obsolete Status and Sourcing Path
For BOM continuity, the functional replacement would require a board spin — the pitch and position count are standard, but the unshrouded single-row form factor and gold plating may not be directly matched by a current production part.