Siemens SIRIUS ACT Illuminated Yellow Push Button Complete Unit SPNO Momentary. Cutout Diameter: 22mm. Push Button Style: Flat. Illuminated: Yes. IP Rating: IP20, IP66, IP67, IP69, IP69K. Maximum AC Voltage: 500V. Maximum DC Voltage: 500V. Push Button Shape: Round. Mounting Type: Panel Mount. Push Button Diameter: 29.45mm. Body Material: Plastic. Push Button Material: Plastic. MPN: 3SU1102-0AB30-1BA0