1. The 3SU1401-1BG40-1AA0 is part of Siemens' SIRIUS 3SU range of illuminated push buttons.
2. It is a 22 mm round illuminated push button that is flush-mounted and has an illuminated red ring and symbols.
3. It includes a rounded metal bezel, a support frame, and a 1 NO contact, and it also has a 1NC contact and a rotary switch.