Overview
The Molex 430450626 is a 6-circuit dual-row header in the Micro-Fit 3.0 43045 series — a 0.118-inch (3.00 mm) pitch family rated for board-to-cable and board-to-board power interconnect up to 600 V and 8 A per contact. The connector ships as a fully loaded all-position part in a shrouded 4-wall housing with a locking ramp that mechanically secures the mating receptacle against vibration. Gold plating on the mating interface (30.0 µin / 0.76 µm) handles repeated engagement cycles; the solder-side posts are tin-plated to 100.0 µin (2.54 µm) for wettable solder joints. Board guides and kinked-pin through-hole tails locate the header during wave or manual soldering and resist post-insertion drift.
Ratings walk-through
At 8 A per circuit the 430450626 clears mid-power duty — the 600 V rating is the binding constraint for many HV industrial and telecom backplane segments, well above what most wire-to-board signal circuits ever demand. The per-contact current is the governing spec; the connector carries no aggregate current derating for the full 6-way bundle. Flammability is UL94 V-0 in glass-filled liquid crystal polymer, which is the standard LCP rating across the 43045 series and sufficient for enclosed equipment compartments in automotive and medical instrument housings. Contact plating is split by interface zone. Gold on the mating face (30.0 µin) resists fretting corrosion and oxide buildup across many reconnect cycles — the thicker the gold flash, the more cycles the interface tolerates before the underlying nickel barrier is compromised. Tin on the solder tail (100.0 µin) is the correct choice for through-hole reflow: it wets reliably and forms a durable intermetallic with the copper pad without the voiding risk that high gold content introduces in solder. This is a deliberate dual-grade finish, not a quality compromise.
Where this class is used
The Micro-Fit 3.0 series is the workhorse in harness-to-board power nodes across industrial automation controllers, medical diagnostic equipment, telecom rack infrastructure, and under-hood automotive modules. The shrouding and locking ramp combination is what distinguishes it from open-pin headers — it is chosen when the connector must survive vibration and accidental cable pull without cycling the mated pair open on its own. The board guide and board-lock features reduce the risk of header tipping during shipping or in-field maintenance. Automotive and medical listings for this series share the same connector footprint, which is why the 43045 family is a common consolidation target for multi-system OEMs looking to cut connector SKUs.