18-position member of the Mini-Fit Jr 5566 line
The 0039299184 is the 18-circuit member of Molex's Mini-Fit Jr 5566 header series, a board-to-cable/wire connector with a 0.165" (4.20mm) pitch. Gold-plated mating contacts, through-hole mounting, and a shrouded 4-wall housing with a locking ramp provide secure retention in industrial and telecom applications.
Board lock and shrouding for vibration resistance
The board lock anchors the header during wave solder and resists shear from cable strain. The 4-wall shroud protects the male pins and guides the mating receptacle, reducing misalignment risk. The locking ramp provides an audible click when mated with the corresponding Mini-Fit Jr receptacle — you should hear it seat before the assembly leaves the bench.