What this header is
The Molex 430451013 is the 10-circuit member of the Micro-Fit 3.0 43045 series — a dual-row board-to-cable header with a 0.118" (3.00 mm) pitch that carries 8 A per circuit at up to 600 V. Gold plating on the mating face (15.0 µin) meets the contact interface with the matching Micro-Fit 3.0 receptacle; 100.0 µin tin on the solder post gives durable through-hole solderability. The 4-wall shroud, locking ramp, and board-guide feature make this suited for automotive harness and industrial power-distribution applications where vibration and blind-mate alignment are design constraints.
Board layout and footprint
The 10 positions in two rows at 0.118" row spacing define the board footprint — the 4-wall shroud sets the keep-out zone around the header. The 0.125" (3.18 mm) kinked pin gives pull-out resistance in the through-hole and acts as a lead-in during placement. The 0.390" (9.91 mm) insulation height and square contact shape are fixed for the series; routing density around the connector is constrained by the shroud, not the pitch.
What the ratings mean for selection
8 A per circuit at 600 V puts this in power-harness territory — it will carry signal and low-power bus equally, but the headline rating governs wire gauge and harness layout for the circuit. The gold flash on the mating interface (15.0 µin) is functional plating for repeat-mate durability, not just a surface finish. Tin on the solder post (100.0 µin) supports wave or hand-solder assembly without gold embrittlement concerns. The -40°C to 105°C operating window covers automotive under-hood and industrial enclosure environments.