The Molex 430451229 is a 12-circuit, dual-row header from the Micro-Fit 3.0 43045 series, designed for board-to-cable/wire interconnects in applications spanning automotive, general purpose, industrial, medical, and telecommunications equipment. It carries 8 A per circuit at 600 V, with 30.0 µin gold on the mating contacts and 100.0 µin tin on the solder tails — a plating split that gives the mating interface corrosion resistance for repeated cycles while keeping the solder joint cost-effective.
The 3.00 mm pitch and 0.118" row spacing define the board footprint — a 12-position, 2-row layout that matches the standard Micro-Fit 3.0 receptacle. The 8 A per circuit rating is derated from the contact's thermal rise; at the 105 °C upper operating limit, expect to reduce current per the manufacturer's derating curve.