Motor Protection Circuit Breaker — SIRIUS 3RV1011-0DA10-ZW95
The Siemens SIRIUS 3RV1011-0DA10-ZW95 is a motor protection circuit breaker rated for 20...690 V AC. It carries Trip Class 10 and 100 kA breaking capacity at 400 V AC. Phase failure detection is built in — if one phase drops, the breaker opens before the motor single-phases and cooks the winding. That's the kind of protection you want on a conveyor or pump drive where a lost phase isn't obvious until the motor smokes. No ground-fault detection, so if you need that, add an external GF relay downstream. Mounting is screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715. The 45 mm width and 75 mm depth keep it to a single DIN-space footprint — fits a standard panel without surprises. Any mounting position simplifies layout in tight enclosures.
Key Ratings and Fit
The 100 kA breaking capacity holds across the voltage range: 240 V, 400 V, 500 V, and 690 V — all AC. At 480 V and 600 V the rated current drops to 0.32 A, so if your motor draws more than that at those voltages, this breaker won't carry it. The thermal setting range is 20...690 V — covers most industrial three-phase supplies. Screw-type terminals on the main current circuit accept 2x (0.5...1.5 mm²) solid or stranded, or 2x (0.75...2.5 mm²). M3 terminal screws.