The 1-917808-2: The 10.16 mm pitch and 0.400" row spacing give it the creepage and clearance for higher-voltage runs — this is a power-grade housing, not a signal-density part. The polarizing key prevents the plug from seating in the wrong orientation on the header, a simple but effective mis-mate guard on the line.
At 0.400" (10.16 mm) pitch, this housing is wide-spaced — each circuit sits far enough from its neighbour that the insulation on 12-14 AWG wire won't crowd the cavity wall. The 2-row layout with matching 0.400" row spacing gives you four positions in a compact but serviceable footprint. For a harness builder, that pitch means you can land larger-diameter power cables without fighting the wire bend radius at the crimp barrel.
Plan the terminal order alongside this housing.
Free-Hanging Mount and Temperature Range
Free hanging (in-line) mounting means this plug floats in the harness — no board lock, no panel flange.
Active lifecycle — no end-of-life notice or successor on record. No official cross-reference to other brands exists in the evidence, so treat the TE Dynamic D-5200 series as the sole mating system.