What this connector is
The Molex 430451225 is the 12-circuit member of the Micro-Fit 3.0 43045 series — a dual-row 3.00 mm pitch header rated 8 A per circuit at 600 V, with gold-plated mating contacts and 100.0 µin (2.54 µm) tin on the solder-post side. The housing is UL94 V-0 rated glass-filled LCP in black, with board-lock and board-guide features and a locking ramp that audibly snaps the mating receptacle into place.
Plating grade governs the duty
Where this connector goes
Micro-Fit 3.0 headers are a standard board-to-wire power and signal interconnect in harness assemblies across automotive, industrial automation, medical equipment, and telecom infrastructure — the 600 V rating gives headroom for AC mains-adjacent power rails, while the shrouded four-wall body protects the contacts during shipping and in high-vibration service.
Sourcing and lifecycle posture
The 430451225 carries an Active product status and ROHS3 Compliant designation — no official successor or cross-reference variant is listed in the ledger. Being a mainstream Micro-Fit 3.0 member, the series has broad second-source availability, but the exact order code should be confirmed with your distributor against your BOM quantity before committing to a quote request.