What it is
The Molex 430452426 is the 24-circuit dual-row member of the Micro-Fit 3.0 43045 series — a board-to-cable header with a 0.118-inch (3.00 mm) pitch and full-position loading across both rows. Shrouding on all four walls wraps the contact array, and a locking ramp on the header body mates with the matching receptacle housing to resist vibration-backed unmating. Through-hole kinked pins stake the unit into the PCB land pattern without a separate press-fit operation.
What the ratings mean
The 8 A per circuit rating reflects the contact's current-carrying capacity — brass contact material and contact geometry set that ceiling. Plating is split: 30.0 microinches of gold on the mating face gives wear resistance across reconnect cycles, while 100.0 microinches of tin on the solder-post side provides reliable wetting during through-hole reflow or hand-solder assembly. The board lock feature reduces peel stress on the through-hole joints under shock and vibration; the board guide ribs align the header to the housing during blind mating. The 600 V rating puts this header into industrial power-distribution territory.
Where this class is used
Micro-Fit 3.0 headers are the board-side half of a board-to-wire power interconnect — they sit on the PCB edge and mate with the matching plug housing that terminates the harness. The dual-plating grade and shrouding make them common in automotive harness junction boxes, industrial actuator drives, and medical device power distributions where the connector sees repeated mating and must survive vibration without supplemental clamping. The UL94 V-0 housing material satisfies flame-retardance requirements in confined enclosures without requiring an additional fire-sleeve over the connector itself.
Mating and termination
This is a male pin header — it mates with the matching Molex Micro-Fit 3.0 receptacle housing accepting discrete wires. The receptacle housing carries the primary latch; the locking ramp on the header body provides the secondary retention that keeps the pair seated when the harness is routed through a vibration-prone channel. The through-hole kinked pin secures it to the board during wave or selective solder assembly. All 24 positions are populated, so there are no open positions to account for in the housing.