The Molex 0003091041 is a 4-position, single-row receptacle from the 1490 series, designed for panel-mount snap-in installation. This is a wire-to-panel interconnect: you crimp terminals onto discrete wires, insert them into the housing, and snap the assembly into a panel cutout. Typical applications include appliance wiring, automotive harness junctions, and control box pass-throughs where a reliable, field-serviceable connection is needed.
The 0.198" (5.03 mm) pitch is wide enough to carry moderate power or signal without crowding the panel cutout — each position has room for a full-size crimp terminal. The locking ramp is the retention mechanism: when the mating plug slides in, the ramp deflects and snaps back, giving an audible click that tells the installer the pair is locked. For environments with vibration, this is more reliable than a simple friction fit. You must order the matching male or female crimp terminals separately. The housing accepts either male or female contacts, giving flexibility depending on whether this receptacle is the fixed panel side or the free-hanging harness side.