80-Position Density in a 1.27mm Pitch SMT Header
The 20021121-00080T4LF: This is the highest circuit-count member of the Minitek127 SMT header family — 80 positions in a dual-row, 1.27mm pitch layout. The gold mating finish at 10 µinch (0.25µm) over copper alloy is a standard signal-grade plating — it prevents oxidation during storage and handles occasional re-mating, but it is not a high-cycle spec. For applications requiring 500+ mating cycles, a thicker gold (15 µinch or more) would be specified.
SMT Termination and Board-Level Fit
In a board-to-board stack, the mated pair is held by the alignment of the two PCBs and any additional standoffs or screws. The 0.120" (3.05mm) mating pin length is short, which limits the stack height to a narrow range — confirm the mating receptacle's pin acceptance depth before committing the BOM. The header ships in a tube (package type: Tube). For high-volume pick-and-place, tube-fed SMT headers require a tube feeder or a tray conversion — plan the assembly line setup accordingly. The black insulation colour aids visual inspection of solder joints after reflow.
The part is RoHS compliant.
Comparing the 80-Position to the 60-Position Sibling
The only parametric difference between the 80-position (20021121-00080T4LF) and the 60-position (20021121-00060T4LF) is the circuit count — 80 vs 60. Everything else is identical: 1.27mm pitch, dual-row, gold mating finish, 1A per contact, 125VAC, SMT, tube, UL94 V-0, -55°C to 125°C. If your BOM calls for 60 positions, the 60-position part saves board space and cost. If you need 80, this is the one.