The Siemens SIRIUS 3RV1946-2C is a door-coupling rotary operating mechanism designed for heavy-duty operating conditions, specifically for use with circuit breakers of size S3. It features an EMERGENCY-OFF design with a red/yellow actuator, allowing a panel door to be closed while the breaker handle is operated from outside the enclosure.
This part is in product phase-out. The preferred successor is the 3RV2946-2C, which has a different drilling pattern, so a panel modification is required when swapping.
Mounts via screw fixing in any position. The operating mechanism is rated for up to 151 operations per hour and operates across -20 to +70 °C, with a storage range of -50 to +80 °C. Dimensions are 75 mm wide, 75 mm high, and 78 mm deep, with a 300 mm length and 40 mm diameter for the shaft/coupling assembly.