Housing for a 4-Circuit Power or Signal Harness
The 1-178128-4: It uses a 5.08 mm pitch — wide enough for moderate power routing without crowding the board footprint. A polarizing key on the housing prevents mismating with the wrong header in multi-connector harness assemblies.
The 5.08 mm pitch is shared across the D-3200 family, so the mating header (a 4-position, single-row, 5.08 mm pitch pin header) is a straightforward cross.
Single Row, One Job — No Confusion
This is a single-row housing. The 4 positions line up in one row, which keeps the wire bundle narrow and the crimp tooling simple. Compare it to the 6-position dual-row sibling 1-2069882-6, which uses the same 5.08 mm pitch but spreads across two rows with a 7.62 mm row spacing — that part suits a wider harness where you need more circuits in a shorter board edge. For a 4-circuit BOM line, the single-row 1-178128-4 is the direct fit; the dual-row version adds positions you don't need and changes the footprint.
RoHS3 compliant. No official second-source cross-reference exists, but the Dynamic D-3200 family is a TE standard, so the mating header and terminal are widely stocked.