The Siemens 3RV1011-0FA15-ZI45 is a motor protection circuit breaker in the SIRIUS 3RV1 series, size S00. It is rated CLASS 10 for thermal overload protection, with an A-release (overload) set at 0.35 to 0.5 A and an N-release (short-circuit) at 6.5 A. The unit includes a factory-fitted transverse auxiliary switch with one normally-open and one normally-closed contact, and uses screw terminals for wiring.
What the ratings mean for fit
The CLASS 10 trip class means this breaker clears an overload before the motor's rotor can overheat under locked-rotor conditions — standard for most general-purpose induction motors driving pumps, fans, and conveyors. The 0.35–0.5 A overload range fits small motors (roughly 0.09–0.12 kW at 400 V three-phase). The 6.5 A magnetic short-circuit release is fixed and non-adjustable; it must coordinate with the upstream feeder breaker. Size S00 snaps onto a 35 mm DIN rail and occupies a 45 mm wide slot in the panel.