What it is
The Molex 430451626 is the 16-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, 0.118" (3.00 mm) pitch header rated 8 A per circuit at 600 V, terminated via kinked through-hole pins and dressed in a full 4-wall shroud with board lock and locking ramp. All 16 positions are loaded. Gold plating on the mating interface (30.0 µin / 0.76 µm) is paired with tin on the solder tails (100.0 µin / 2.54 µm) — the standard finish split for this series, where the mating-side gold handles repeated engagement cycles and the post-side tin supports solderability and board rework. The housing is black liquid crystal polymer, glass-filled, rated UL94 V-0, with an insulation height of 0.390" (9.91 mm).
What the ratings mean for the fit
At 8 A per circuit the 430451626 sits at the top current rating in the Micro-Fit 3.0 line — the circuit count and current together set whether this member fits a power-distribution BOM position or a lower-current signal row. The gold-plated mating interface with 30.0 µin thickness supports the higher mating-cycle demands of field-service or panel harnesses; the tin-post finish at 100.0 µin is optimised for solder-joint reliability in through-hole assembly and is not the limiting factor on current-carrying capacity. The 600 V rating covers industrial automation and telecom power rails comfortably; the -40 °C to 105 °C window brackets automotive under-hood and factory-floor environments. The 4-wall shroud and locking ramp together resist accidental dismate under vibration — the board lock anchors the header to the PCB during wave or hand-solder thermal excursion.
Where the class is used
Micro-Fit 3.0 headers are used as board-to-cable power interconnects in harness assemblies across automotive, industrial automation, medical, and telecommunications equipment. The shrouded header format and locking ramp make the 430451626 suited to in-cabinet or under-panel power distribution nodes where vibration and repeated mating are design constraints.
Lifecycle and compliance
The 430451626 is Active and ROHS3 Compliant. No official successor or cross-reference is listed in the ledger; the part is quoted to order against the BOM quantity. Confirm the position count and the matching receptacle housing before committing to the line — the mating half is the 16-circuit Micro-Fit 3.0 plug housing that pairs with this header's pin array.