What it is
The Molex 430451213 is the 12-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, shrouded male header rated 600V with 8A per circuit at 3.00mm pitch (0.118 in). It mounts through-hole with a kinked solder pin and a locking ramp that secures the mating half against vibration. The board guide feature on the housing wall aids alignment during plug-in, which matters in dense panel layouts where visibility at the connector face is limited.
Plating split and what it means for your circuit
The contact finish is split across the two functional zones: gold at 15.0µin (0.38µm) on the mating interface, tin at 100.0µin (2.54µm) on the solder post. The gold on the mating side gives the cycle life needed for field reconnects and test-fixture use; the thick tin on the solder tail handles the board-level solder joint reliably and resists whiskers better than thinner tin deposits. If you are routing this as a power rail, the 8A per circuit rating is the governing figure — the 600V rating gives substantial headroom for most industrial bus voltages.
Sourcing and compliance
The 430451213 carries an Active product status and is ROHS3 Compliant, so it is in standard production and quotable against BOM quantity. No official successor or cross-reference is listed in the record — if your design is evolving to a different position count, the same series at another circuit density is the natural migration path, but an explicit L* successor has not been published. Quoted to order against your RFQ.