SIRIUS 3RV2011-1FA20-ZW97 — Motor Protection Circuit Breaker
The Siemens 3RV2011-1FA20-ZW97 is a SIRIUS motor protection circuit breaker designed for motor protection, with a rated voltage range of 20 to 690 V. It carries a 100 kA short-circuit breaking capacity at 240 V, 400 V, and 500 V — meaning it can safely clear a fault up to that level without cascading upstream, which is the figure that governs selectivity in a motor branch circuit. Trip Class 10 means the bimetal releases within 10 seconds at 7.2× rated current, sized for standard induction motor startup profiles — pumps, conveyors, compressors. Phase failure detection is built in; ground fault detection is not, so this unit covers loss-of-phase protection but needs a separate ground-fault device if required by code. Snaps onto 35 mm DIN rail per DIN EN 60715, or screws direct to a backplate — mount in any position.
DIN-Rail Footprint & Wiring
Width is 45 mm; depth is 97 mm; height is 106 mm. Clearance: 50 mm above and below, 30 mm to the side, zero forward or backward — tight panel spacing works. Main circuit terminals are spring-loaded, accepting 2 × (0.5 to 4 mm²) solid or stranded — strip, insert, done. No screw torque to verify.
Lifecycle & Sourcing
The lifecycle stage is listed as current — meaning Siemens still produces this order code as a standard catalog item.
Ratings & Operating Conditions
Maximum switching frequency in AC-3 duty is 15 operations per hour — that's the thermal limit for motor starting, not the mechanical life. For resistive loads (AC-1) the rate is higher, but the evidence doesn't list it separately. Fuse coordination ratings: gL/gG 32 A at 400 V and 500 V, derating to 25 A at 690 V — size the upstream fuse accordingly. Motor horsepower coverage: 0.5 hp at 230 V, 1 hp at 208/230 V, 3 hp at 460/480 V and 575/600 V. Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C.