The Molex 1511000004 is a 4-position receptacle housing from the Milli-Grid 151100 series, built for wire-to-board or wire-to-wire harnesses where a compact 2.00mm pitch keeps the assembly narrow. The single-row layout and latch lock fastening give a positive click when mated, which holds against vibration in equipment that gets moved or serviced.
The 2.00mm pitch keeps the connector body narrow — about 8 mm wide for 4 circuits — which fits tight spots on a board edge or inside a harness junction box. The single row means one crimp operation per wire, no staggering. The latch lock is the retention mechanism: it snaps into the mating header's locking ramp and holds the pair together until you press the latch to release. No secondary lock or screw is needed for most applications. That covers indoor equipment, consumer appliances, and automotive cabin environments — not under-hood heat, but fine for dashboards, HVAC controls, and power supply harnesses. The ROHS3 compliance means it ships into European and RoHS-regulated assemblies without an exemption notice.