What it is
The Molex 430452407 is the 24-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, 3.00 mm (0.118") pitch board-to-cable header designed for right-angle SMT termination. It carries a 4-wall shroud and a locking ramp on the housing to resist cable pull-out, and the board-lock feature adds retention force at the PCB interface beyond what the solder joint alone provides.
Key ratings and what they mean
Rated 8 A per contact at 600 V — the voltage headline is well above what most harness-level 3 mm power interconnects actually run, so the 8 A current rating is the tighter design constraint. The 8 A figure is per circuit, not a bus-total, so a fully loaded 24-circuit connector can carry that current on every circuit simultaneously within the connector's thermal limits. Contact finish splits across the connector: the mating interface carries gold at 15.0 µin (0.38 µm) over nickel, while the solder-tail/post side is tin at 100.0 µin (2.54 µm). The gold-on-mating is sufficient for the connector's intended cycle life in harness applications — enough to suppress fretting and maintain low contact resistance across multiple mating events — while the thick tin post gives a reliable, wettable solder joint during SMT reflow. Insulation height is 7.37 mm (0.290") mated — this determines the z-height contribution at the board interface and should be verified against the board stack-up and any enclosing chassisdatum before committing the footprint. Housing is glass-filled liquid crystal polymer rated UL94 V-0, spanning −40 °C to 105 °C operating — solid for most industrial and automotive harness environments without sealed connector requirements.
Where this class is used
Board-to-cable Micro-Fit 3.0 headers are a standard mid-power harness connector in industrial automation, automotive module interconnects, medical device cabling, and telecom infrastructure — anywhere a 3 mm dual-row header delivers enough circuit count and current in a compact footprint with a reliable latch-up interface. The locking ramp on this header makes it the cable-side half of the interconnect; the board-side 24-circuit receptacle carries the matching female contacts.
Lifecycle and sourcing
The 430452407 is Active and ROHS3 Compliant per the manufacturer record — quoted to order against BOM quantity. No official successor or cross-reference is listed in the series lifecycle data. Confirm the 24-position count against the BOM line before committing; the Micro-Fit 3.0 series spans 2 to 24 circuits at this same 3.00 mm pitch, so a circuit-count mismatch is the most common ordering error on this family.