What this connector is
The Molex 430450422 is the 4-circuit member of the Micro-Fit 3.0 43045 series — a dual-row right-angle male header rated 8 A per circuit at up to 600 V, terminated via through-hole solder legs. The style is listed as Board to Cable/Wire, which reflects the connector's role as the board-side half of a wire-to-board power interconnect — the male header mates with the matching Micro-Fit 3.0 receptacle housing carrying female crimp terminals on the cable side.
Key ratings and what they mean
8 A per circuit at 3.00 mm pitch is a healthy current density for this form factor — the 8 A figure applies per individual circuit, so a fully loaded 4-position header can carry 8 A on each of its four contacts simultaneously under normal derating conditions. 600 V rating supports industrial and infrastructure distribution applications. The voltage class and creepage/clearance geometry handle common industrial bus voltages. The 15.0 µin (0.38 µm) gold on the mating interface delivers low contact resistance at first mate and significantly better fretting resistance than tin-only finishes — this is what makes the connector viable for field-service or intermittent mating cycles. The 100.0 µin (2.54 µm) tin plating on the solder tails is sized for solderability and long-term board joint integrity, not for repeated mating. The operating window is -40°C to 105°C, and the housing material is UL94 V-0 rated LCP glass-filled — this combination is standard for in-cabinet industrial and automotive under-hood environments where the connector may see thermal cycling without active cooling. The 4-wall shroud and locking ramp protect contacts and provide an audible click on mate — useful in production assembly without visual access to the connector.
Sourcing and compliance
Specified to order against the BOM quantity via RFQ. The pitch, dual-row geometry, and position count are consistent across the Micro-Fit 3.0 43045 series — confirm the 4-position count matches your circuit and that the mating receptacle housing is also specified in the BOM.