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.
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.