The Square D Harmony 9001KXSG4 is a 30 mm, three‑position key selector switch designed for panel mounting in industrial control applications. As part of the 9001KX family, this key‑operated operator provides left, center, and right positions, with the key withdrawable in the center position to enable secure changeover. It is built for use in control sequencing and interlock applications where a keyed, multi‑state selector switch is required for reliable panel operation.
