What it is and where it sits in the series
The Molex 430451027 is the 10-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, board-mount header with a locking ramp and 4-wall shrouding that takes the matching Micro-Fit 3.0 plug housing off the wire harness and seats it on the PCB at 3.00 mm pitch.
What the key ratings mean for the fit
What this class is for
Micro-Fit 3.0 headers are used as board-to-cable power interconnects in harness assemblies across industrial automation, automotive, medical, and telecom equipment — the locking ramp on the header and the primary latch on the mating plug housing give a redundant mechanical hold that plain friction-fit headers do not provide.
Lifecycle and sourcing
Listed as Active with ROHS3 Compliant status — the series is in normal production and sourced to order against BOM quantities. No official successor or cross-reference is listed for this specific order code.