3SE5 Safety Interlock Switch, Metal, 2NC/1NO. Connection Type: M20. Lock Style: Key. Maximum AC Voltage: 230V. Maximum DC Voltage: 24V. Safety Contacts: 1NC. Range: Sirius. Auxiliary Contacts: 2NO. Minimum Operating Temperature: -25°C. Dimensions: 110 x 56 x 37.8 mm. Depth: 37.8mm. Maximum Current: 3 A. MPN: 3SE5122-1QV10, Siemens