The Siemens SIRIUS 3RV2926-0K is a door-coupling rotary operating mechanism designed for circuit breakers in sizes S00, S0, S2, and S3. It uses a 330 mm shaft to extend the breaker handle through an enclosure door, letting you open or close the breaker without opening the panel.
The 330 mm shaft length governs the maximum panel depth between the breaker and the door face — measure your door-to-rail distance before committing. The IP64 rating means the mechanism seals against dust ingress and splashing water, so it's suited for washdown areas or outdoor cabinets where you don't want grit getting into the handle mechanism. Screw fixing is the mounting method; no DIN-rail clip here, so plan for four mounting holes in the door or sub-panel.
Where the class is used
Door-coupling mechanisms like this one are standard on motor control centers and distribution panels where the breaker handle must be reachable from outside the enclosure. The 3RV2926-0K sits between the breaker rotary handle and the door, letting operators isolate a circuit without exposing live parts. The 15 1/h maximum operating frequency tells you this is for occasional switching — not a high-cycle disconnect.