What it is and where it fits
The Siemens 3RV2011-0HA15-ZX95 is a SIRIUS motor protection circuit breaker designed to protect motors against overload, short-circuit, and phase failure. It mounts via screw or snap-on onto 35 mm standard mounting rail per DIN EN 60715, making it a direct fit for any standard industrial control panel. Trip Class 10 means it will trip within 10 seconds at 7.2× rated current — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starts. The 100 kA breaking capacity at 400 V gives it enough interrupting capability for most industrial distribution panels without requiring upstream fuses.
Mounting and clearance
Panel integration is straightforward: the 45 mm width matches the standard 45 mm DIN-rail module pitch. Clearance requirements are 50 mm above and below, 30 mm to the side, and zero forward or backward — so it can be stacked tightly in a row with other SIRIUS components. The M3 screw terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²), which covers most motor feeder wiring.
Key ratings and what they mean
Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 120/125/230 V, and 0.15 A at 60 V — these are typical for signaling the breaker's status to a PLC or indicator lamp. The main circuit is rated for 20 to 690 V, covering most global motor voltages. Phase failure detection is built in, so a lost phase will trip the breaker before the motor overheats. The operating temperature range is -20 to +60 °C, with storage and transport range from -50 to +80 °C. Mounting position is any, which simplifies panel layout.