Motor protection circuit breaker for panel integration
The Siemens 3RV2011-1BA15-ZW97 is a SIRIUS motor protection circuit breaker designed to protect motor branch circuits against overload, short circuit, and phase failure. It snaps onto a 35 mm DIN rail per DIN EN 60715 and occupies a 45 mm wide footprint — a standard slot in any motor control center or distribution panel. Trip Class 10 means it will trip within 10 seconds at 7.2× the thermal setting, fast enough to protect standard induction motors during locked-rotor conditions without nuisance tripping on normal starts. Phase failure detection is built in, so a lost leg on the supply side will drop the load before single-phasing damages the winding.
Breaking capacity and selectivity headroom
Rated short-circuit breaking capacity reaches 100 kA at 240 V, 400 V, and 500 V, and 10 kA at 690 V. That 100 kA figure at 400 V is the kind of high-fault rating you need when the breaker sits downstream of a large transformer or in a high-capacity distribution board — it clears a bolted fault without requiring an upstream current-limiting fuse for coordination. The gL/gG fuse-limit ratings (25 A at 400/500 V, 20 A at 690 V) define the maximum backup fuse that preserves selectivity. If you are coordinating a panel with gG fuses upstream, those values tell you the fuse size that will let the breaker trip first on a downstream fault.
Mounting and wiring constraints
Mounting position is any, but the clearance requirements are specific: 50 mm upwards and downwards, 30 mm at the side, and 0 mm forwards and backwards. That 50 mm vertical clearance is critical for heat dissipation from the bimetal trip element — cramming it into a tight wireway without that gap will cause premature thermal tripping. Main circuit terminals accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded copper, terminated with M3 screws. The auxiliary contact block (rated 1 A at 24 V, 0.5 A at 120/230 V) shares the same screw-type terminal format — consistent with the main circuit termination.