The Siemens SIRIUS 3RV2926-0D is a door-coupling rotary operating mechanism designed to let you open and close a circuit breaker from outside an enclosed panel — no need to open the door to reset or isolate. It fits the full SIRIUS 3RV breaker family across sizes S00, S0, S2, and S3, so one mechanism covers a wide range of motor-protective and circuit-breaker frames in the same enclosure cutout. Rated IP64, the mechanism seals against dust ingress and splash from any direction — fine for washdown areas or dusty panel rooms. The supplied shaft is 330 mm, long enough to reach through a standard enclosure depth and still leave room for the door swing.
Fastening is by screw fixing — no DIN-rail clip, so you drill and tap the door panel. The mechanism measures 66 mm wide by 66 mm high by 50 mm deep (the depth behind the panel face), with a total length of 130 mm including the shaft. Operating frequency is rated up to 151 operations per hour — that is about one cycle every 24 seconds, adequate for manual isolation or occasional reset but not for continuous switching duty.