Schneider Electric 9001KS11B Maintained Selector Switch

The Schneider Electric 9001KS11B Maintained Selector Switch provides durable, two-position control for industrial panels, operated by a knob and designed to maintain a selected state until manually changed, making it well suited for on/off and mode-selection functions in harsh environments. As part of the 9001K Heavy-Duty series, this switch fits a 30.5 mm mounting diameter, uses screw-terminal connections via contact blocks (K-series compatible) to complete the circuit, enabling flexible field wiring and easy replacement in control panels, operator stations, and manufacturing lines. It carries a NEMA Type 4 and 13 enclosure rating, supports a rated operational voltage up to 600 VAC and a rated current up to 10 A with appropriate contacts, and is designed for operating temperatures from -25°C to +70°C, ensuring reliability in demanding industrial settings. Common replacements include Allen-Bradley 800T-J2, Siemens 3SB3500-2EA11, and Schneider Electric XB4BD21, highlighting its role in retrofit projects and ongoing maintenance to preserve consistent operator control.