Molex Minitek127 20021221-00034T1LF Header 34-Pos 1.27mm Pitch SMT

The Molex 20021221-00034T1LF is the 34-circuit member of the Minitek127® 1.27mm series — a dual-row shrouded board-to-board header designed for mezzanine or stacked PCB interconnection in instrumentation and industrial automation applications. With a 0.050" (1.27mm) pitch and 34 positions across two rows, this header sits at the high-density end of the Minitek127 family — the 34-contact count accommodates larger parallel signal buses or multi-channel acquisition paths where routing density is constrained. All 34 positions are loaded with square male pins, and the four-wall shroud provides polarisation keying to prevent mis-mating during blind board-stacking — the push-pull push-pull fastening type relies on this shrouding for stubbing resistance rather than a screw lock. Contact finish splits across the interface: the mating side carries gold flash, while the solder-post side is tin-plated to 50.0 µin (1.27 µm) for solderability. The flash gold grade is suited to a limited number of mating cycles; if the application requires repeated reconnect, the contact durability is the limiting constraint. Rated 1 A per contact at the stated operating range of -55°C to 125°C — the dual-beam square-pin geometry keeps contact resistance low within that current band, but the rating anchors signal-path budgeting rather than power distribution.