Siemens SIRIUS ACT Black Push Button Complete Unit SPNO Momentary. Cutout Diameter: 22mm. IP Rating: IP66, IP67, IP69, IP69K. Maximum AC Voltage: 500V. Maximum DC Voltage: 500V. Push Button Shape: Round. Mounting Type: Panel Mount. Body Material: Plastic. Push Button Material: Plastic. Push Button Marking: Unmarked. Terminal Type: Screw. Maximum Operating Temperature: +70°C. MPN: 3SU1801-2GA00-2AA1