The Siemens 3RV2011-1BA20 is a SIRIUS motor protection circuit breaker designed for Class 10 trip response, meaning it will disconnect the motor within 10 seconds under a locked-rotor condition — a standard fit for general-purpose induction motors driving pumps, fans, and conveyors. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, in any position, and occupies 45 mm of panel width with a 97 mm depth — a compact footprint that leaves room for contactors and overload relays on the same rail. The main circuit connection uses spring-loaded terminals accepting 2x (0.5 to 4 mm²) solid or stranded wire, which speeds panel wiring and maintains consistent clamping force over time compared to screw terminals.
Breaking Capacity and Short-Circuit Coordination
Rated breaking capacity reaches 100 kA at 240 V, 400 V, and 500 V AC, dropping to 10 kA at 690 V AC. This 100 kA figure at common distribution voltages (400 V) means the breaker can safely interrupt high-fault-current scenarios without upstream fuses or a larger frame — a key advantage in high-capacity MCCs or transformer-fed panels where available fault current exceeds 50 kA. For backup fuse coordination, the unit is rated for gL/gG fuses: 25 A at 400 V and 500 V, 20 A at 690 V. This lets the designer size the upstream fuse to match the breaker's let-through energy without over-fusing the branch.
Integration and Mounting Notes
Clearance requirements: 50 mm upwards and downwards, 30 mm to the side, 0 mm forwards and backwards — so the breaker can sit flush against a panel backplate or enclosure wall without additional standoffs. Ambient operating range is -20 to +60 °C; storage and transport range extends to -50 to +80 °C.