What it is and what it does
The Siemens 3RV2011-0GA15 is a SIRIUS motor protection circuit breaker designed to protect motors against overload and short-circuit. It is a CLASS 10 trip device, meaning it will trip within 10 seconds at 7.2× the thermal setting — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starting inrush. It includes phase failure detection, so if one phase drops out, the breaker trips before single-phasing damages the motor winding.
Mounting and panel fit
Mounts via screw fixing or snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width matches the standard SIRIUS 3RV2 footprint — it occupies one 45 mm slot in a panel layout. Any mounting position is permitted, so it fits tight enclosures where orientation is constrained. Clearance: 50 mm above and below, 30 mm at the sides, zero forward or backward. That 50 mm vertical gap is the minimum for arc-chamber venting and terminal access — don't crowd it against a gland plate or busbar.
Environmental and electrical ratings
Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C. The wider storage limit governs handling and warehousing, not running conditions. Rated operational voltage spans 20 to 690 V. Short-circuit breaking capacity at 400 V is 100 kA — sufficient for high-fault installations downstream of a large transformer. Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 120/125/230 V, 0.15 A at 60 V. The 690 V main circuit uses gL/gG 6 A fuse backup.