Siemens SIRIUS ACT Illuminated Red Push Button Complete Unit NC 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: Metal. Minimum Operating Temperature: -25°C. MPN: 3SU1152-0AB20-1CA0