What it is
The Molex 430452400 is the 24-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, right-angle, through-hole header built for board-to-cable power interconnects in harness assemblies. Pitch is 3.00 mm, row spacing matches at 3.00 mm, giving a standard Micro-Fit 3.0 footprint that the board layout engineer will recognise immediately. Voltage rating of 600V sets this above many commodity headers — it will handle industrial mains-adjacent rails, not just low-voltage signal runs.
Plating, retention, and field-service angle
Tin plating covers both the mating face and the solder post — no gold flash here. The stated thickness is 100 µin (2.54 µm) on the mating side, which is substantial for tin and means lower contact resistance at first mate than a thin tin flash, but the plating grade still signals signal-duty or light power-duty rather than high-cycle instrumentation. The locking ramp on the housing face provides a positive retention catch; the board lock feature keeps the header seated during wave-solder transport and in-service vibration — a meaningful combination that makes this connector a reasonable field-replacement candidate rather than a press-fit-only design. Contact material is brass alloy, square pin shape — standard for the series, accepts the matching Micro-Fit 3.0 female crimp terminal.
Housing material and thermal envelope
Insulation body is glass-filled liquid crystal polymer rated UL94 V-0 — the flammability rating clears most industrial and medical enclosure builds where the housing material certification is a design gate. Operating range is -40°C to 105°C, and insulation height is 0.290 inch (7.37 mm) — the board layout engineer should check that the right-angle mated profile clears any adjacent tall components in the enclosure. All 24 positions are populated — no reduced-load option on this part number.
Sourcing and the BOM close
Listed Active with ROHS3 Compliant status — no LTB watch or EOL flag on this part number. Quoted to order against the BOM quantity. The 430452400 mates with the matching Micro-Fit 3.0 receptacle housing and female crimp terminals in the 43045 series — confirm the position count and the wire gauge range match the harness before committing.