The Siemens SIRIUS 3RV1011-1KA20-ZW96 is a three-pole motor-protective circuit breaker rated 12 A continuous with CLASS 10 trip characteristics. It switches motor loads up to 5.5 kW at 400 V AC-3 duty, with a breaking capacity of 50 kA at 400 V AC. Phase failure detection is built in, and the front face carries IP20 touch protection (finger-safe).
Mounting and Wiring
Snaps onto 35 mm DIN rail per DIN EN 50022; screw and snap-on fastening both supported. Width is 45 mm, depth 81 mm, height 90 mm. Main and auxiliary/control circuits use spring-loaded terminals, accepting 2x (0.25 to 2.5 mm²) solid or 2x (0.25 to 1.5 mm²) finely stranded with ferrule. AWG range 24 to 14 for the main contacts. Strip length 8 mm avoids whiskers under the cage. Mounting position any; no derating for orientation.
Electrical Ratings and Protection
Rated insulation voltage 690 V. Breaking capacity at 240 V AC is 100 kA; at 400 V AC, 50 kA; at 500 V AC, 3 kA; at 690 V AC, 2 kA. The CLASS 10 trip curve means the bimetal releases within 10 seconds at 7.2× rated current — standard for protecting standard induction motors against locked-rotor conditions. Power dissipation in hot operating state is 9.25 W total, 3.1 W per pole. Surge voltage resistance rated at 6000 V. Maximum operating frequency at AC-3 is 15 operations per hour.