Three-Circuit Plug Housing for Mini-Fit Jr 5559 Harnesses
The Molex 0039014033 is the 3-circuit plug housing in the Mini-Fit Jr 5559 series, a wire-to-wire and wire-to-board interconnect family rated for power distribution in equipment enclosures. The 4.20mm pitch gives enough spacing between circuits to handle the current the series is known for — typically 9 A per circuit with the right crimp terminal — without forcing a wide connector footprint.
The male pin terminals for this plug housing are typically the Molex 5558 series (e.g., 55580020 for 20-24 AWG wire), and the female crimp terminals for the mating receptacle are the 5556 series. The housing accepts the standard Mini-Fit Jr terminal position assurance (TPA) retainer to lock each contact in place after insertion.
The panel mount snap-in feature lets you install the housing into a panel cutout without hardware — the locking ramps on the sides engage the panel edge.