Housing for a 18-Circuit Power Harness
The Molex 0039012181 is the 18-position plug housing from the Mini-Fit Jr 5559 series, a dual-row panel-mount shell with a 4.20mm pitch. This is the housing only; you order the crimp contacts separately to populate the 18 cavities.
What It Takes to Populate It
The 18 cavities accept the standard Mini-Fit Jr male crimp terminal.
The 18-position 0039012181 sits alongside the 12-position 0039012081 in the same Mini-Fit Jr 5559 family. Both share the 4.20mm pitch, dual-row layout, locking ramp, and panel-mount snap-in. The difference is the circuit count — 18 positions vs 12 — which changes the harness width and the number of terminals you need to crimp. If your BOM calls for 12 circuits, the 0039012081 is the direct fit; for 18, this is the one.