What this connector is
The 65823-043LF is the 50-circuit member of Amphenol FCI's Quickie series — a dual-row shrouded board-to-cable header with a push-pull friction-lock that seats into the matching IDC or ribbon-cable receptacle without threaded hardware. At 0.100 inch (2.54 mm) row and mating pitch per and, the dual-row header aligns with standard ribbon-cable conductor layouts so the insulation displacement lands cleanly on each conductor rather than between them. The shroud is 4-wall full enclosure per; the mounting flange with through-hole anchors the header to the PCB before and during the cable-termination press operation, and the keying slot at pin one prevents mis-indexing the ribbon.
Key ratings for the BOM decision
50 positions loaded all, dual row, 0.100 inch pitch per, and — confirm your ribbon has exactly 50 conductors and that your receptacle is also the 50-position Quickie member. Contact finish is gold or Gold GXT at 30.0 µin (0.76 µm) on the mating interface — a substantial gold thickness that gives the push-pull contacts reliable multiple-mate cycle life compared to tin-only IDC headers. Insulation body is glass-filled polyester rated UL94 V-0, which matters in enclosed equipment where the header sits near the board edge in a confined harness envelope. Right-angle through-hole termination with a post length of 0.105 inch (2.67 mm) and a mating pin engagement of 0.230 inch (5.84 mm) — the right-angle orientation puts the board entry at the PCB surface while the mating face sits parallel to the board plane, suitable for edge-entry ribbon routing.
Where it is used
Quickie headers are the standard ribbon-cable interconnect in industrial automation control racks and instrumentation backplanes — the press-fit mounting flange and push-pull lock make them suited for field-serviceable harness nodes where the cable assembly must be pulled and re-seated repeatedly. The 0.305 inch (7.75 mm) insulation height and full shrouding protect the pin array during cable-routing over adjacent components in dense panel builds.
Lifecycle and sourcing
Listed Active — quoted to order against BOM quantity. Confirm with the sourcing desk whether any same-series variant carries a different position count that might serve as a functional cross-reference for your harness count.