What this 60-position mezzanine header does in the board stack
The B4061B7L111260E100 is a 60-circuit, 2-row header with center strip contacts from the B4061B7L series, built for board-to-board mezzanine stacking at a 0.031" (0.80mm) pitch. Gold flash contacts (2.00µin / 0.051µm) are standard for this series; the thin plating works fine for a connector that mates once in the assembly and stays there, but it won't hold up to repeated field disconnect cycles. Board guide and pick-and-place features are built in, so the header handles cleanly on an SMT line — the guide aligns the part during reflow and the pick-and-place pad gives the nozzle a flat target.
60 positions vs 80 or 90 — picking the right circuit count
The B4061B7L series shares the same 0.031" (0.80mm) pitch, 2-row layout, gold flash contacts, and 8.80mm stack height across all position counts. The B4061B7L111260E100 carries 60 positions; the B4061B7L111280E100 carries 80 positions, and the B4061B7L111290E100 carries 90 positions. There is no difference in plating thickness, height, or pitch between these three variants.
Where it fits — board-to-board mezzanine duty
This is a mezzanine plug header, meaning it sits on the bottom board and mates with a receptacle on the top board to create a parallel board stack. The 2-row center strip contact arrangement gives a balanced pin field — no staggered rows to confuse the layout. Surface-mount termination keeps the assembly reflow-compatible, and the board guide prevents skew during placement.