The Siemens SIRIUS 3RV6926-0C is a door-coupling rotary operating mechanism designed for emergency-off (EMERGENCY OFF) applications. It mounts to the enclosure door and couples mechanically to the rotary actuator of a circuit breaker, letting you open or close the breaker from outside the panel without opening the door. This mechanism fits circuit breakers in sizes S0, S2, and S3 — the three middle frame sizes in the SIRIUS line — and uses a 130 mm shaft to reach through the door. The IP64 rating on the operating element means it's sealed against dust ingress and splashing water, which matters for panels in washdown areas or dusty environments where the door handle is exposed. The red/yellow actuator color signals emergency-stop function per IEC 60947-5-5. The maximum operating frequency of 151 operations per hour is a mechanical limit on the coupling, not the breaker — fine for infrequent emergency disconnects but not for repeated cycling as a normal disconnect.
The 3RV6926-0C carries a current lifecycle status from Siemens, meaning it remains an active catalog item in the SIRIUS accessory range. No successor has been announced, and the part is specified into new panels as the standard door-coupling mechanism for S0–S3 breakers.