The 10127721-101LF: RoHS compliant per.
Board Layout Fit: 3.00 mm Pitch, 10 Circuits
The dual-row layout saves board space compared to a single-row 10-position header, and the 0.433" (11.00 mm) insulation height provides clearance for wire dress in the mating housing.
Mating and Locking: Shrouded with Locking Ramp
The locking ramp is a mechanical latch, not a friction fit, so it holds even after many mating cycles.
Termination and Contact Plating
The thick 100 µinch plating extends wear life compared to standard 40–80 µinch tin finishes.
RoHS compliant per.
Comparison with 12-Position Sibling 10127721-121LF
The 10127721-121LF is identical in every respect except position count: 12 positions vs 10. Same 3.00 mm pitch, same dual-row layout, same shrouding, locking ramp, tin plating, and UL94 V-0 housing. If your BOM calls for 10 circuits, this 10127721-101LF is the correct part; the 12-position version is a drop-in replacement only if you have two extra circuits to populate.