What it is
The Molex 430450421 is the 4-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, right-angle board-to-cable header with a 0.118" (3.00 mm) pitch. Rated 8 A per circuit at 600 V with tin-plated contacts (60.0 µin / 1.52 µm on the mating face), it uses a solder termination and mounts through-hole with an integral board lock to resist vibration pull-out.
What the ratings mean
Tin plating at 60.0 µin (1.52 µm) is the standard commercial grade for the series — adequate for high-cycle industrial mating. Operating range is -40°C to 105°C with UL94 V-0 insulation — the temperature ceiling is set by the LCP material, which is glass-filled and handles the higher end of the industrial envelope without going soft. For anything above 105°C sustained, the series thermal limit is the gating factor.
Sourcing and lifecycle
Active and ROHS3 compliant — quoted to order against the BOM quantity. No official successor order code exists for this position count; confirm the mating half and circuit count match your BOM line before committing to the RFQ.