The Siemens SIRIUS 3RV2023-4BA10 is a motor-protection circuit breaker designed for Class 10 trip response, meaning it clears a fault within 10 seconds at 7.2× the thermal setting — tight enough to protect standard induction motors during locked-rotor events without nuisance tripping on normal starts. Rated at 7.5 kW at 400 V and 11 kW at 500 V, it also carries 20 A at 480 V and 20 A at 600 V, with a 2 kA breaking capacity at 690 V. The integrated phase failure detection catches a lost leg before the motor single-phases to a burn, which is the main reason this breaker gets spec'd over a plain thermal-magnetic.
The 45 mm width and 97 mm depth match the SIRIUS 3RV2 footprint — same gland-plate cutout as the 3RV2021 and 3RV2023 siblings, so a panel laid out for one accepts the other without re-drilling. Screw-type terminals on the main circuit accept 2x (1…2.5 mm²) or 2x (2.5…10 mm²) solid or stranded copper. The M4 contact screws need a 5–6 mm shaft diameter driver; torque to the standard 2.5 Nm for the main circuit.
Ambient and storage limits
Operates from -20 to +60 °C with temperature compensation active across the same range. Storage and transport tolerate -50 to +80 °C. The 50 mm clearance required above and below, and 30 mm at the sides, is for arc-quenching and heat dissipation — pack the rail spacing accordingly.