The Molex 430451622 is the 16-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, right-angle male header with a full four-wall shroud, locking ramp, and board-lock feature designed for board-to-cable interconnects in automotive, industrial, medical, and telecom applications.
Ratings that drive the fit decision
Current is rated 8 A per circuit. For a 3.00 mm pitch header that is solid headroom — the limiting factor in this form factor is more often the housing thermal limit than the contact rating itself, but 8 A per circuit gives meaningful power-path flexibility without derating to tin-plated levels. Voltage is rated 600 V — a specification aligned with the higher-voltage end of the applications listed for this series. The graded plating is the key selection detail in this series. The mating face carries 15.0 µin (0.38 µm) gold; the solder tail carries 100.0 µin (2.54 µm) tin. Gold on mating preserves low contact resistance and reconnection life; the thick tin on the post end aids solder wetting and long-term oxidation resistance at the board interface. Operating temperature range is -40°C to 105°C and the housing material is glass-filled liquid crystal polymer rated UL94 V-0 — a standard industrial/automotive thermal envelope with no unusual derating requirements within that window.
Mating and termination
This is a male pin header — it mates with the matching Micro-Fit 3.0 receptacle housing (the female housing that accepts the corresponding crimp terminals). The locking ramp on the header body engages the housing latch for positive retention under vibration — the shroud and four-wall design keeps the mated pair mechanically stable and protects the pin array from side load. Termination is through-hole solder. The 0.125" (3.18mm) post length suits standard PCB thickness; the board-lock feature provides lateral retention in the hole before solder fills the barrell, which matters on wave-solder assembly lines where gravity can shift an unshrouded header before the solder wets.
Sourcing and compliance
The product status is Active and the part is ROHS3 Compliant. No official successor or cross-reference order code appears in the record. Quoted to order against BOM quantity — confirm your position count, mating half compatibility, and the graded plating configuration. The 16-position count, board-lock feature, and locking ramp are the series identifiers to cross against the mating housing and terminal BOM lines.