Schneider Electric ZB4BG2 Key Switch Maintained

Schneider Electric ZB4BG2 Harmony 22 mm key switch head is a two-position, maintained operating head for the Harmony XB4 family, designed to be paired with an XB4 switch body to form a complete keyed selector switch. The unmarked, non-illuminated head fits standard 22 mm panel cutouts and features a durable metal housing suitable for rugged industrial use. It uses key code 455 and supports left-key withdrawal, enabling authorized operators to remove or insert the key for mode changes while the switch remains in its last selected position. The maintained action latches in either ON or OFF, providing stable, repeatable control without returning to center. This ZB4BG2 head is intended for panel-mount applications in machine control, process automation, and safety interlocks where secure access to operation is required; when combined with the appropriate XB4 body and contact blocks, it delivers a compact, robust 22 mm solution for mode selection and equipment control in industrial environments.