The Molex 430450407 is a 4-position, 2-row surface-mount right-angle header from the Micro-Fit 3.0 43045 series. It's a board-to-cable/wire interconnect — the male pin header solders to the PCB and mates with the corresponding Micro-Fit 3.0 receptacle housing (sold separately) to complete a wire harness. The 3.00 mm pitch and 0.118" row spacing give enough room for 600 V creepage without forcing an oversized board footprint, and the 8 A per-circuit rating handles moderate power — think an internal DC distribution rail or a multi-wire sensor harness in an automotive or industrial cabinet.
Key Design Features for the Board and Harness
This header mates with the Micro-Fit 3.0 receptacle housing — a 4-circuit, 2-row version like the 430250400 (sold as a housing only; terminals ordered separately). The receptacle accepts 20-24 AWG wire with the matching crimp terminal (Molex 430300001 for 20-24 AWG). For a complete build-to-print BOM, you need the header, the receptacle housing, and the crimp terminals — all three are separate line items.