The Molex 430451206 is a 12-circuit, dual-row header from the Micro-Fit 3.0 43045 series, designed for board-to-wire power and signal interconnects. This is a surface-mount, right-angle version with a full 4-wall shroud and a locking ramp, so the mated connector stays put under vibration.
For a harness that gets mated once in production and stays, this is the right call.
The 12-position 430451206 sits alongside the 6-position 430451206 in the same Micro-Fit 3.0 right-angle SMT family. The decision between them is purely circuit count — same 3.00 mm pitch, same 8 A rating, same board lock and shrouding. Match the position count to your BOM line and the footprint stays the same.