The Molex 2159131004 is a 4-circuit, single-row receptacle from the Mini-Fit series, designed for wire-to-board power interconnects. It uses crimp-terminated female sockets and mates with the corresponding Mini-Fit header. The 4.20mm pitch provides enough creepage for moderate current loads without forcing an oversized footprint, making it a common choice for power distribution in appliances, automotive harnesses, and industrial control panels.
The latch lock fastening type keeps the mated pair secure under vibration — the lock clicks audibly when fully seated, which is a reliability check on the assembly line. The black polyamide housing carries no UL rating in this listing, but the material is standard for Mini-Fit connectors used inside enclosures requiring a V-0 flame class. The free-hanging (in-line) mounting means this receptacle is wired into a harness, not soldered to a board — the crimp terminals are inserted into the housing and retained by the latch.