Siemens 3SB3000-0AA21 Illuminating Push Button

Siemens 3SB3000-0AA21 Illuminating Push Button is a 22 mm panel-mount pushbutton with a plastic round actuator and a flat red button, supplied with a holder for secure installation behind a standard 22 mm cutout; the unit’s front ring is black and the device is designed as an illuminating pushbutton to provide visual status in low-light environments. It offers two switching positions and is built for robust industrial use, typically employed in control stations, machine panels, and process signaling where clear on/off indication is required. The 3SB3 family designation places it among Siemens’ compact signaling devices for automation, and the IP65 front protection helps shield the operating face from dust and water ingress in factory settings. Available in catalogs from Siemens and distributors, 3SB3000-0AA21 is described as a red actuating element with a holder, matching standard 22 mm panel cutouts and enabling reliable, quick panel wiring and mounting in demanding environments.