What this header is
The Molex 430450629 is a 6-circuit dual-row header in the Micro-Fit 3.0 43045 series, with a 0.118-inch (3.00 mm) pitch and through-hole solder termination. The contact set is split-plated: gold (30.0 µin) on the mating face and tin (100.0 µin) on the solder post — the gold gives durable mate/unmate cycles at the interface while the tin finish optimises the solder joint to the PCB pad. Rated 8 A per circuit at 600 V, the shroud, locking ramp, and board-guide feature on the header face lock the receptacle and protect the contacts during harness assembly and vibration-prone service.
What the key ratings mean for your BOM
Eight amps per circuit is the primary differentiator for wire gauge selection on the harness side. The 600 V rating opens telecom and industrial power distribution as use cases beyond the automotive harness the series is best known for. The dual-plating grades govern two separate process decisions: gold at 30.0 µin on the mating side gives the cycle life for field-service reconnection or production-level mate/de-mate; tin at 100.0 µin on the post determines the reflow or wave-solder profile. Do not assume the tin post plating implies a low-cycle part — the mating interface is the life-limiting surface, and that is gold. The 8 A current is a per-contact figure; the total current through the connector is the sum of circuits loaded, constrained by the wire gauge and harness layout rather than a derating formula. Operating temperature range is -40°C to 105°C with UL94 V-0 flammability rating on the LCP insulator. This combination covers automotive engine-adjacent zones and medical equipment enclosures where the 105°C upper limit and the non-burning, self-extinguishing insulator are both required by the end-use standard.
Where this class of connector is used
Board-to-cable power interconnect in harness assemblies — the shrouded header mounts to the PCB and receives the matching Micro-Fit 3.0 plug housing on the wire side. Applications listed for this series span automotive, industrial automation, medical equipment, and telecommunications, driven by the 600 V rating and the vibration-resistant locking ramp on the header body.
Lifecycle and sourcing
The 430450629 carries an Active product status and is ROHS3 Compliant. No official successor or cross-reference order code is on record. Quoted to order against the BOM quantity — confirm the circuit count, mating-half compatibility, and the locking-ramp orientation before committing a BOM line. The pitch, dual-plating grades, and 8 A rating are all confirmed; the sourcing posture is standard for an Active series member with no supply-chain flag on record.