What this connector is
The FCI (Amphenol) 20021121-00064D4LF is the 64-position member of the Minitek127 1.27mm pitch dual-row board-to-board header series. It is an unshrouded male pin header with square contact shape, surface-mount termination, and push-pull fastening — a fastening mode less common than spring-tab latching in this pitch class, suited to mezzanine or stacked board configurations where the mating direction is axial rather than withdrawn laterally. The contact system uses a split plating grade: the mating interface carries 10.0 µin (0.25 µm) gold, while the solder tail side is 50.0 µin (1.27 µm) tin. The gold on the mating side supports repeated engagement cycles; the tin on the post side is optimised for solderability and shelf life. All 64 circuits are populated in the tube package, and the housing is black thermoplastic rated UL94 V-0.
Ratings that drive the selection decision
Pitch is 0.050 inch (1.27 mm) with the same 0.050 inch row spacing — a 2-row, 64-circuit footprint that demands tight routing discipline around the header on the PCB. The 1A per contact current rating at 125VAC reflects the signal-duty character of this dense header; do not aggregate the 64 contacts into a power bus figure — the 1 A ceiling is per circuit and the limiting factor is contact current density, not the housing. Operating range of -55°C to 125°C covers the full industrial temperature band; the pick-and-place feature accommodates SMT assembly throughput without a dedicated vacuum tool target. The push-pull fastening and unshrouded geometry mean this header is not sealed against side-entry contamination — do not specify it for applications requiring side-seal or panel gasket integration.