What it is
The Molex 430451800 is an 18-position, dual-row header in the Micro-Fit 3.0 43045 series, board-to-cable oriented with male pin contacts. It mates at 0.118" (3.00 mm) pitch and mounts right-angle through-hole on the PCB. The 100.0 µin (2.54 µm) tin plating runs on both the mating face and the solder tail, which is thicker than the minimum functional grade — this supports extended reconnect duty compared to thinner flash-tin parts in the same series. Rated 8 A per circuit at up to 600 V, it uses a locking ramp to resist vibration-assisted unmating, and the board-lock feature adds retention in the PCB hole beyond what a press-fit alone provides.
Where this connector type is used
Micro-Fit 3.0 headers are a standard wire-to-board and board-to-cable power interconnect in harness assemblies across automotive, industrial automation, and medical equipment. The shrouding, locking ramp, and 600 V rating make this a preferred choice for inline connections that need positive retention under load cycling and vibration. The 8 A per circuit rating handles mid-range power distribution — above signal-level IDC but below dedicated power terminal blocks — and the dual-row 18-circuit count suits mid-size ECU or subsystem power rails.
What separates it from the series baseline
This 18-position member carries the full-4-wall shroud, locking ramp, and board lock — not all variants in the series include all three features simultaneously. The right-angle through-hole orientation and the tin plating at 100.0 µin (2.54 µm) on both mating and solder-tail sides define the specific fit envelope.