Telemecanique ZB4 BK1243 Selector Switch Illuminated

The Telemecanique Harmony ZB4 BK1243 illuminated selector switch is a 3-position, panel-mount device with a 22 mm mounting diameter, designed for machine mode selection and status indication in industrial automation. It features a maintained operation, a chromium-plated metal bezel, and IP66 protection, making it suitable for machine control panels, operator stations, conveyors, and packaging equipment where illuminated position feedback is needed. Part of the Harmony ZB4 family, it complies with IEC 60947-5-1 and is a common replacement for Schneider Electric variants such as ZB4BK1233, ZB5AK1243, and XB4BK1243.