The 77317-403-66LF: The 66 circuits are fully loaded — all positions are present, no skipped pins.
Tin plating is cost-effective for moderate-cycle applications — it mates well with tin or gold receptacles, though repeated mating (over 50 cycles) will wear the tin and increase contact resistance.
Mating and Footprint Compatibility
The right-angle orientation means the receptacle sits perpendicular to the header's mounting plane; verify the stack height and clearance in your enclosure.
