It's the female half of the MTA-156 wire-to-board system, designed to mate with standard 0.156" pitch headers. The closed-end design means the daisy-chain stops here — no pass-through for additional downstream connections, which simplifies termination in point-to-point harness runs.
IDC termination for 18 AWG wire — no stripping, no crimping. The orange housing color is a visual key for the 18 AWG variant in the MTA-156 family, helping identify wire gauge at a glance on the assembly line.
Mates with any standard MTA-156 header at the same 0.156" (3.96mm) pitch — TE part numbers in the 640445 and 640456 series, among others. The single-row, 3-position layout is a direct match for a 3-pin header.