What it is and where it sits in the series
The Molex 430452228 is the 22-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, through-hole header built for board-to-cable power interconnect. All 22 positions are loaded. The 3.00 mm pitch and dual-row layout give a dense footprint for the circuit count, and the shrouding on all four walls keeps the mating face protected against debris in industrial and automotive environments. The locking ramp is the primary retention feature that locks the receptacle housing into the header — without it the latch can back out under vibration. Board guides on the header body align the receptacle during field assembly so the pins seat correctly without bending.
What the ratings mean for your selection
The headline ratings are 8 A per circuit at 600 V — this combination puts the 430452228 in the power-interconnect tier of the Micro-Fit 3.0 family rather than signal-only duty. The contact plating split is the series-defining detail: gold flash on the mating face (, 15.0 µin / 0.38 µm) gives low insertion resistance and good mating-cycle life on the plug side, while the solder tail carries 100 µin (2.54 µm) tin for solderability and long-term oxidation resistance on the board joint. The 8 A rating is per contact, and the LCP housing carries a UL94 V-0 flammability rating — relevant for industrial and automotive enclosures where flame-retardance is specified.