It is the female half of the AMP-Latch system, mating with the corresponding 16-position male header (0.100" pitch, 2.54mm row spacing) to create a reliable board-to-cable interconnect.
The polarizing key is a molded-in feature on the housing that prevents the receptacle from being inserted backwards onto the header — a simple but critical detail when the cable assembly is built in a harness shop and the orientation must be locked before the IDC press. The free-hanging (in-line) mounting style means this receptacle is not panel-mounted; it floats on the cable and relies on the header's board locks or retention features for mechanical security.
It is a current-production part with no announced end-of-life, so it can be specified into new BOMs without a last-time-buy risk. No official cross-reference or direct equivalent is on record; the AMP-Latch series uses a standard 0.100" x 0.100" grid, so any 16-position AMP-Latch header with the same pitch and row spacing will mate, but the exact order code should be matched to the BOM line.