Siemens 3RV2011-1KA10-V2 — SIRIUS 3RV20 motor protection circuit breaker, frame size S00. Rated 0.11 to 16 A adjustable, up to 100 kA short-circuit breaking, IEC 60947-4-1 type-2 coordination with paired 3RT2 contactor. SIRIUS 3RV2 MPCB 9-12A, trip class 10, 100kA at 400V. Motor protection up to 5.5kW at 400V. Standard for small pump-motor combinations. Installed as the primary motor branch-circuit protection device between the incoming feeder and the contactor.