Siemens 3RV2011-0AA40 SIRIUS Motor Protection Circuit Breaker
The Siemens 3RV2011-0AA40 is a SIRIUS motor protection circuit breaker designed to protect motors against overload and short-circuit, with a CLASS 10 trip characteristic that matches standard motor starting curves — it holds through the inrush and trips before the winding heats past rated temperature. Rated for a short-circuit breaking capacity of 100 kA at 400 V AC, this breaker can safely interrupt high-fault currents without cascading upstream, making it suitable for panels with high available fault current. It includes phase failure detection, so a lost phase on the line side will cause the breaker to trip — a common failure mode that can single-phase a motor and burn it out quickly.
Mounting and Panel Integration
Fastens via screw and snap-on mounting onto 35 mm DIN rail per DIN EN 60715, which is the standard rail profile in most industrial control panels. Size S00 means it fits the compact footprint — 45 mm wide, 97 mm deep, 97 mm tall — leaving room for adjacent devices on the same rail. Mounting position is any, so it can be laid flat or stood vertical without derating. Clearance requirements: 50 mm above and below, 30 mm at the sides, zero forward or backward — this keeps heat dissipation paths open and allows the arc chute to vent.
Environmental and Operating Range
Rated for operation from -20 to +60 °C, which covers most indoor panel environments including unventilated enclosures near process heat. Storage and transport range extends from -50 to +80 °C.