What this breaker is and where it lands
The Siemens 3RV2011-1BA10-ZX95 is a SIRIUS motor-protection circuit breaker designed for protecting three-phase induction motors against overload and short-circuit faults. It snaps onto a 35 mm DIN rail per DIN EN 60715 and accepts screw-type terminals for the main circuit — a standard panel fit for motor control centers and distribution boards. Trip Class 10 means it clears an overload within 10 seconds at 7.2× the thermal setting — fast enough to protect standard IEC motor windings during a locked-rotor event. Phase failure detection is built in, so a lost phase on the line side trips the breaker rather than letting the motor single-phase and burn.
Breaking capacity — what the numbers mean for your panel
At 400 V AC the 3RV2011-1BA10-ZX95 interrupts 100 kA, and at 690 V it still holds 10 kA. That 100 kA figure at 400 V means it can safely clear a fault on a high-capacity transformer secondary without the upstream fuse or breaker needing to coordinate — the breaker itself handles the full let-through. At 690 V the 10 kA rating still covers most industrial motor branch circuits; only very high-fault installations would need an upstream current-limiting device. The gL/gG fuse backup ratings are 25 A at 400 V and 500 V, dropping to 20 A at 690 V — these are the maximum upstream fuse sizes that still allow the breaker to achieve its full interrupting rating. If your panel already has a 25 A gG fuse ahead of this breaker, you're covered up to 500 V.
Mounting and clearances — panel fit
The breaker measures 45 mm wide, 97 mm deep, and 97 mm tall — a compact footprint that fits a standard 45 mm slot on a DIN rail. Required clearances: 50 mm above and below for arc-chamber venting, 30 mm to the side, and zero forward or backward clearance needed. That zero-backwards spec means it can sit flush against a backplate or gland plate without derating. Mounting position is any orientation, so vertical or horizontal rail placement works. The screw terminals accept 2×(0.75–2.5 mm²) solid or stranded, or 2×4 mm² — enough for the motor feeder on a 0.13 hp (230 V) to 1 hp (460/480 V or 575/600 V) motor.