What This Header Is
The Molex 430451215 is the 12-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, 3.00mm pitch SMT header designed for board-to-wire harness interconnects. It carries tin-plated brass contacts rated 8 A per circuit up to 600 V, housed in a black glass-filled LCP body that survives -40°C to 105°C. The full four-wall shroud, locking ramp, and board-lock feature work together to keep the connector seated under vibration — a common failure mode in automotive and industrial harnesses where wire-side stress loads the header during service.