The Molex 430452028 is the 20-circuit, dual-row member of the Micro-Fit 3.0 43045 series — a shrouded through-hole header with male square pins on a 3.00 mm pitch. It is designed for board-to-wire power and signal interconnects in automotive, industrial, medical, and telecom equipment, where the locking ramp and 4-wall shroud protect the mating interface against vibration and accidental unmating. The through-hole solder tails (0.125" post length) and tin-plated termination side (100.0 µ") are compatible with wave-solder assembly. The board guide aids placement during reflow, and the UL94 V-0 LCP housing handles the temperature profile without distortion.
The locking ramp engages the receptacle latch for positive retention — audible click confirms full mate. Build-to-print requires the receptacle housing, crimp terminals for the wire gauge, and the header itself; all three are separate line items on the BOM.