What it is and where it sits in the series
The Molex 430452027 is the 20-circuit member of the Micro-Fit 3.0 43045 series — a dual-row shrouded header designed for board-to-cable interconnects in automotive, industrial, medical, and telecom applications. The 3.00 mm pitch and 2-row layout match every other member of the 43045 series, so the board footprint and any in-series mating half are shared across the full range.
Ratings that drive the fit decision
8 A per circuit at 600 V gives this header headroom for inline power distribution beyond simple signal duty. Tin plating at 1.52 µm on the mating interface is the standard grade for the 43045 series — adequate for multiple mating cycles in production or field service, but if the application demands more than a few hundred cycles the gold-plated option in the same series would be the move. The shrouding is four-wall — all four sides enclosed — which prevents mis-mating and gives the locking ramp a solid cage to pull against. The locking ramp itself holds the mated pair against vibration; the TPA board guide feature keeps the header seated during wave or reflow assembly. All 20 positions are loaded, so the full dual-row footprint is present — verify the cable-side receptacle carries the matching 20-circuit load before specifying the mating half.
Lifecycle and compliance
Listed Active with ROHS3 Compliant status — no successor or cross-reference is listed for this order code. For sourcing, quote against the BOM quantity; confirm the mating half and pitch before committing.