Motor protection circuit breaker for Class 10 trip curves
The Siemens SIRIUS 3RV2011-1EA25-ZW96 is a motor protection circuit breaker designed for Class 10 trip response, meaning it disconnects within 10 seconds at 7.2× the thermal setting — fast enough to protect standard induction motors during locked-rotor starts without nuisance tripping on normal acceleration. Rated breaking capacity hits 100 kA at 400 V, so this part can interrupt high-fault currents in industrial distribution without cascading upstream breakers. Phase failure detection is built in — if one line drops, the breaker trips to prevent single-phasing motor damage.
Panel integration and mounting
Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, in any orientation. Width is 45 mm — one standard 9 mm module less than a typical 3-pole breaker, saving rail space in crowded enclosures. Depth of 97 mm fits standard 120 mm deep enclosures with clearance for wiring. Spring-loaded terminals on the main circuit accept 2× (0.5 to 2.5 mm²) solid or stranded copper. Clearance requirements: 50 mm above and below, 30 mm to the side for heat dissipation and arc chute venting.
Sourcing and lifecycle
For BOM freeze or compliance documentation (RoHS, REACH, UL, IEC), Siemens provides the standard SIRIUS declaration pack with each shipment; nameplate data matches the order code for PO traceability.