The Siemens SIRIUS 3RV6926-0B is a door-coupling rotary operating mechanism designed for use with SIRIUS circuit-breakers in sizes S0, S2, and S3. It provides a means to operate the circuit-breaker from outside the enclosure door, with a 130 mm shaft length to reach through the door thickness. The mechanism is black, mounts via screw fixing, and includes an interlock feature plus the ability to lock the handle in the OFF position for lockout/tagout compliance.
What the ratings mean for fit
The 130 mm shaft length determines the maximum door thickness this mechanism can bridge — measure your enclosure door before ordering. The mechanism is rated for circuit-breakers in sizes S0, S2, and S3, meaning it physically interfaces with the rotary operator on those breaker frames. Mounting is by screw fixing, so you'll need to drill and tap the door panel; no DIN-rail clip is involved. The interlock feature and lockable OFF position allow the door to remain closed when the breaker is ON, and the handle can be padlocked in the OFF position for safe maintenance access.