Sealed 12-Circuit Plug for Harness Builds
The Molex MX150L 0194351212 is a 12-position, 2-row sealed plug from the 19435 series, designed for panel-mount wire-to-wire applications where moisture and vibration are present. The 5.84 mm pitch and 0.236" row spacing give it a stout footprint suited for power distribution in sealed harness assemblies. You order the terminals separately, sized for your wire gauge. The sealing is integral to the MX150L design: the interface seal lives in the plug, and the locking ramp compresses it against the mating receptacle. The IP rating holds only when the pair is fully mated and locked — cap the open half if it sits unmated between shifts.
What the Sealing and Locking Mean on the Line
The sealed feature and locking ramp together define this connector's deployment: it belongs in a harness that sees washdown, road spray, or condensation, and where a vibration-loosened connection would cause a fault. The locking ramp gives a tactile confirmation of full mate — you hear it click. That click is also the moment the interface seal compresses. Without the ramp fully engaged, the seal gap opens and the IP rating is lost.
Panel Mount and Termination Sequence
This plug mounts through a panel cutout — the housing snaps into the hole and the locking ramp faces outward for the receptacle to engage. The MX150L uses a standard terminal position assurance (TPA) feature to confirm full insertion, though the TPA retainer is separate. The crimp termination means no soldering on the line — field-replaceable terminals, reworkable harness.
Sourcing for the BOM Line
The BOM line must account for the separate crimp terminals — the housing alone does not complete the assembly.