Schneider Electric ZB4BG3 3 Position Key Switch

Schneider Electric ZB4BG3 is a Harmony XB4 22 mm metal key-switch head, finished in black, designed for three fixed positions with a stay-put (maintained) action. It accepts key number 455 and supports key withdrawal from the center position, enabling removal of the key when the switch is in the center. This head is intended to pair with Harmony XB4 22 mm selector switch bodies (for example ZB4BZ103) to form a complete 3-position key switch assembly. As part of Schneider Electric’s Harmony XB4 family, the ZB4BG3 provides a robust metal interface for front-panel key-activated operation in control panels and other equipment requiring authorized access to selected functions.