What it is and where it sits in the 91999 series
The Molex 919990495 is the 3-position member of the Appli-Mate 91999 RAST 5 series — a single-row vertical header with male blade contacts, through-hole solder termination, and a 0.197" (5.00mm) pitch. The pitch and blade geometry are specific to the RAST 5 insulation-displacement mating interface used in appliance and industrial automation harness assemblies, where the header indexes into a matching housing under the latch-lock fastener. The series material is Polyamide (PA66), Nylon 6/6, rated for the -20°C to 120°C operating window — wide enough for both cold-start appliance environments and warm-running equipment bays.
Same-series peer — the 2-position member
The 919990499 shares the same 0.197" (5.00mm) pitch, 16 A rating, silver finish, latch-lock fastening, and board-guide geometry as the 919990495 — the only functional difference is circuit count: 2 positions versus 3. A panel routed for the 919990499 can accept the 3-position 919990495 only if the footprint has been laid out to accommodate the wider row span; it will not drop in without rewiring the harness and checking the housing cavity width. Both are active parts in the same series with identical voltage and current ratings, so for a 3-circuit BOM line the 919990495 is the direct fit — the 919990499 is the correct choice for a 2-circuit position.