What this connector is
The Molex 430451428 is the 14-circuit dual-row member of the Micro-Fit 3.0 43045 series — a 3.00 mm pitch board-to-cable header with a 4-wall shroud, locking ramp, and board-guide feature designed for retained, vibration-resistant mating in harness and panel-side board interconnect applications.
Ratings that drive fit decisions
The contact system splits plating by function: gold at the mating interface (15.0 µin / 0.38 µm) delivers the cycle-life and low-resistance performance at the circuit interface, while the post side carries 100.0 µin (2.54 µm) tin for solderability and long-term atmospheric resistance. The current rating of 8 A per circuit and 600 V voltage rating are sized for power-plus-signal hybrid board-to-cable duties common in industrial control and automotive harness nodes. The operating envelope runs from -40 °C to 105 °C, with the LCP housing rated UL94 V-0 for flame-retardant requirements in enclosed equipment. All 14 positions are loaded — no reduced-load option on this part number.
Mating and sourcing check
The locking ramp on the header body engages the primary latch on the receptacle housing; board-guide ribs locate the header during through-hole insertion. Verify the post length of 0.125 in (3.18 mm) clears your PCB stack-up. The connector is Active and ROHS3 Compliant — confirm the 14-position count matches your harness circuit count before quoting.
What this connector is used for
Board-to-cable power and signal interconnect in environments that demand both mechanical retention and flame safety: automotive harness nodes, industrial automation panels, medical equipment power rails, and telecom infrastructure modules all commonly deploy the Micro-Fit 3.0 form factor. The 4-wall shroud, locking ramp, and through-hole mounting handle vibration exposure better than friction-fit headers, making the 43045 series the default choice where harness service access is infrequent and mate security cannot depend on operator force alone.