The Molex 430451421 is a 14-position, dual-row header from the Micro-Fit 3.0 43045 series, designed for board-to-wire power interconnect in harness assemblies. It uses a 3.00 mm pitch on both the pin-to-pin and row spacing, which sets the PCB footprint and routing density. Rated at 8 A per circuit with a 600 V voltage rating, this is a power-grade header, not a signal-only interconnect—the 8 A rating gives real headroom for DC rail or motor drive connections in automotive, industrial, and telecom equipment.
What the key ratings mean for your fit
The 3.00 mm pitch is the first dimension to match against your existing PCB layout—it dictates the hole pattern and clearance to adjacent components. The tin-on-tin contact finish at 60 µin on the mating side is a workhorse plating for moderate mating cycles (typically 25-50 cycles); it is not intended for high-cycle or corrosive environments where gold would be specified. The locking ramp and board lock together secure the connector against vibration—the board lock holds the header during wave solder and resists shear from cable strain, while the ramp latches to the mating receptacle housing. The right-angle orientation places the mating face parallel to the board, which saves Z-height in a space-constrained enclosure but requires enough clearance on the board edge for the cable exit.
Where it fits in the series
Within the Micro-Fit 3.0 43045 header family, the 430451421 sits at 14 positions in a dual-row configuration. The same 3.00 mm pitch and 8 A per circuit rating carry across the series, so the main selection driver is position count matching your BOM circuit count. The 16-position sibling 430451610 uses the identical footprint and ratings but adds two more circuits—useful if you need extra power or sense lines without changing the connector family or tooling.
The datasheet is available from the manufacturer's documentation portal for the full mechanical drawing and mating interface dimensions.