Motor-protective circuit breaker for Class 10 duty
The Siemens SIRIUS 3RV2011-0KA10-ZX95 is a motor-protective circuit breaker designed for Class 10 trip response, meaning it clears overloads within 10 seconds at 7.2× the thermal setting — fast enough to protect standard induction motors during start-up without nuisance tripping on normal inrush. Rated breaking capacity hits 100 kA at 400 V AC and 500 V AC, so it can interrupt a high-fault bolted short without needing an upstream current-limiting fuse in most industrial panels.
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715; the 45 mm width means it occupies a single modular unit, leaving adjacent slots free for contactors or auxiliaries. Dimensions are 45 mm wide × 97 mm high × 97 mm deep, with 50 mm clearance required above and below for wiring and heat dissipation — no side clearance needed. Screw-type terminals on the main circuit accept 2×(0.75–2.5 mm²) solid/stranded or a single 4 mm² conductor; M3 screws on the main contacts.