What it is — and where it sits in the 43045 series
The Molex 430450829 is the 8-position dual-row member of the Micro-Fit 3.0 43045 header family — a board-mount header rated 8 A per circuit at 600 V, with a 3.00 mm pitch and through-hole solder termination. The 4-wall shroud and locking ramp are built in; the board guide feature helps self-align the header during paste-in-place or press-fit assembly.
Split plating — what the gold/tin system means for your circuit
The mating face carries gold-over-nickel plating at 30.0 µin (0.76 µm), which is the durable surface for repeated mate/de-mate cycles. The solder-post side is thick tin at 100.0 µin (2.54 µm), optimised for solderability and resistance to oxidation in the through-hole barrel. The contact material is brass throughout. The two plating thicknesses exist for different jobs — gold on the face, tin on the post — so do not read the post thickness as a durability signal for the mating interface.
Duty class — current and voltage in context
8 A per circuit is the headline; 600 V is the voltage ceiling. Micro-Fit 3.0 is routinely deployed in wire-to-board power interconnect — the 3.00 mm pitch sits between low-power pin-headers and full-size power connectors, so 8 A at this density is the sweet spot for compact power distribution without going to a dedicated power header. The operating range of -40°C to 105°C covers both underhood-adjacent industrial environments and enclosed medical instrument bays.