Schneider Electric 9001KS11K1 Key Switch 30mm Maintained

Schneider Electric 9001KS11K1 Key Selector Switch is a 30 mm, maintained, two-position switch designed for secure manual selection in industrial control systems. Part of the 9001K Heavy-Duty series, this key-operated switch features a 1 NO + 1 NC contact configuration (K1 block) and screw-terminal connections for reliable field wiring. Its NEMA 4 and 13 enclosure rating provides protection in harsh industrial environments, while its operational range covers up to 600 VAC and up to 10 A, with an operating temperature span from -25°C to +70°C. Typical applications include control panels for mode selection (auto/manual), safety interlocking in process control, and equipment where only authorized personnel can change system states. Common replacements include Schneider Electric XB4BG21, Allen-Bradley 800T-H2, and Siemens 3SB3500-4EA31, making it a compatible option for retrofit or replacement projects.