Siemens 3SU1050-4BN21-0AA0

The Siemens 3SU1050-4BN21-0AA0 is a key-operated switch designed with a 22 mm round metal housing, featuring a polished finish. This model offers three switch positions—on, off, and an additional function—with a left-position latching mechanism and a right-position momentary contact, activated by a 45-degree turn in either direction. The key can be removed only in the off position, enhancing operational safety. It includes two keys and supports special lock variants if needed. This reliable switch is available through BSP Automation, making it a practical choice for applications requiring secure and precise control.