The Molex 430451222 is a 12-position dual-row male header in the Micro-Fit 3.0 series — a board-to-cable power header designed to mate with the matching Micro-Fit 3.0 plug housing in harness assemblies. The connector sits at 0.118" (3.00 mm) pitch, right-angle orientation, through-hole solder termination, and carries the shroud-4-wall shrouding with a locking ramp for positive mating retention — the board lock feature adds shear support at the PCB interface. Rated 8 A per circuit at up to 600 V, it runs gold on the mating face (15.0 µin, 0.38 µm) for durability across reconnect cycles, and tin on the solder tail (100.0 µin, 2.54 µm) for reliable solder-wet fill. The LCP glass-filled insulator is UL94 V-0 rated.
Ratings that drive fit decisions
Eight amps per circuit at 600 V puts this squarely in medium-power territory — the dual-row 12-position layout at 3.00 mm pitch gives 12 circuits in a footprint that handles wire-to-board power distribution in industrial controls, medical equipment, and automotive modules without needing a larger connector. The gold-plated mating interface (15.0 µin) is the relevant durability spec — it governs how many insert/withdraw cycles the contact pair sustains before degradation; the tin-plated post is purely a solder-side finish and carries no mating-cycle implication. The shroud-4-wall designation means all four sidewalls are closed, which improves contact protection and EMI shielding in high-density or noisy environments. The board-lock feature is the mechanical anchor that prevents the header from rocking or lifting under vibration at the board surface — critical in any application with thermal cycling or mechanical shock. The 0.290" (7.37 mm) insulation height sets the header standoff from the board surface, which matters when the mated connector pair sits against a chassis panel or when the board assembly has a surface-mount component density constraint near the header footprint.