What it is and where it sits in the series
The Molex 430452411 is the 24-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, right-angle SMT header with a 0.118" (3.00mm) pitch and the full shrouding that defines this family. The style is listed as Board to Cable/Wire, which means the header is the board-side half of a plug-to-board pair — it mates with the matching Micro-Fit 3.0 plug housing carrying crimp terminals. The locking ramp on the housing side is what keeps the pair seated under vibration.
What the key ratings mean
The 8A per contact rating reflects the circuit capacity of the Micro-Fit 3.0 beam — for a 24-circuit header that is a meaningful current ceiling in a dense industrial harness. The dual-plating split is what separates this from a commodity tin header: the mating face carries 30.0µin (0.76µm) gold which gives the reconnect cycles a wear-resistant surface, while the solder-post side is 100.0µin (2.54µm) tin for solder-wetting robustness and shelf-life protection against oxidation. Buyers sometimes look at the gold and assume it is a power-contact grade — it is not; the 8A ceiling comes from the beam geometry, not the plating. The 600V rating and -40°C to 105°C operating window appear in the spec table. The UL94 V-0 LCP glass-filled insulator governs confined-space placement.