What it is and what it does
The Siemens 3RV2011-0DA15-ZW97 is a SIRIUS motor protection circuit breaker designed for motor protection duty. It trips on overload and short-circuit, with phase failure detection built in — so a single lost phase won't let the motor cook while drawing locked-rotor current. Trip Class 10 means it clears an overload within 10 seconds at 7.2× rated current — fast enough to protect standard induction motors during stall or jam conditions without nuisance tripping on normal starting inrush. Rated breaking capacity hits 100 kA at 400 V, 500 V, and 690 V AC. That's high enough for most industrial distribution panels downstream of a transformer; you can coordinate selectively without worrying about the breaker failing to clear a bolted fault. Mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 60715. Width is 45 mm, depth 97 mm. Screw-type terminals on the main circuit accept 2× (0.5…1.5 mm²) solid or stranded, or 2× (0.75…2.5 mm²). No special crimp tool needed on site; a standard PZ2 screwdriver gets it done.
Where you'll find it
Typical spot: a motor control center bucket or a standalone panel feeding a pump, fan, or conveyor motor up to the rating limit of the Class 10 trip curve. The phase failure detection is especially useful on three-phase lines where a blown fuse upstream would otherwise go unnoticed until the motor burns. Mounting position is any — upright, sideways, even upside-down in a tight enclosure. The ambient range of -20 to +60 °C during operation covers most indoor industrial environments; derate if you're near a furnace or in a desert MCC. No ground fault detection on this variant. If you need GF protection, you'd add an external module or step up to a 3RV20 series with the GF option. Phase failure is covered; ground fault is not.