Square D 9001-KS11 C7 Momentary Pushbutton Switch

Square D Harmony 9001KS11 is a 30-mm, two-position selector switch in the Type K family, built for panel mounting in industrial control panels. The device provides two selectable states and is part of Schneider Electric's Square D Harmony line, with variations offering different knob styles and contact configurations. The 30-mm diameter operator fits standard Harmony 9001K style mounting and is offered in multiple variants, including 9001KS11B (non-illuminated, black maintained operator) and 9001KS11FB (knob-equipped with a large black knob), reflecting the range of configurations available for this model. The KS11 family is rated for up to 600 V and is designed for rugged environments; several listings show compatibility with NEMA 4/4X enclosures and related IP ratings depending on the exact assembly. In practical use, it functions to route control signals or select operation modes in machines and control panels, making it common in motor control circuits, process automation, and centralized control stations. Verified variants indicate that contact configurations can include combinations such as 1 normally open and 1 normally closed contact, depending on the specific KS11 variant.