The Molex 430452412 is the 24-circuit dual-row member of the Micro-Fit 3.0 43045 header series — a board-to-cable power interconnect with a shrouded 4-wall housing, locking ramp, and through-hole kinked-pin solder tail. Tin-plated brass contacts carry 8 A per circuit at up to 600 V, and the housing insulator is glass-filled LCP rated UL94 V-0 across a -40 to 105 °C operating window. All 24 positions are loaded. The 3.00 mm pitch and dual-row layout place it in the mid-density power-header class, suited for sealed automotive harness take-offs, industrial control modules, and medical device power rails where vibration resistance and mate security are non-negotiable.
What the shrouding and locking ramp mean on the bench
Four-wall shrouding and the locking ramp are the features that keep this header seated in a vibrating harness — they are not cosmetic. The shroud walls protect the pin array from side-load damage during handling and shipping, and the locking ramp catches the receptacle's primary latch so the mated pair stays sealed under mechanical shock. The board guide ribs in the housing help align the header during through-hole solder assembly so the four-wall shroud seats cleanly on the PCB keep-out zone without requiring a dedicated alignment fixture. Match the insulation height of 0.390 inches (9.91 mm) against your board stack-up to confirm clearance under any overmould that will be over the header.
Ratings that drive the layout decision
Pitch is 3.00 mm with 3.00 mm row spacing — the footprint is square-grid, so signal-routing density is the same in both axes. The post length is 0.125 inches (3.18 mm) from — the kinked pin seats the header in the through-hole without a press-fit fixture. Voltage rating of 600 V is well above most low-voltage harness levels; the 8 A per-circuit rating governs wire gauge selection in the mating harness, not the header itself. Operating temperature to 105 °C covers the interior of most sealed enclosures without derating.