The Siemens 3RA2115-0BD15-1AK6 is a SIRIUS non-fused motor starter in a direct-starter design, size S00. It ships as a pre-assembled unit that includes the 3RT2015-1AK61 contactor, the 3RV2011-0BA15 circuit-breaker, the 3RA1921-1DA00 link module, and the 8US1251-5DS10 busbar adapter.
The magnetic short-circuit trip and thermal overload work together: the magnetic element clears fast faults, while the bimetallic overload tracks the motor's thermal curve. Mounting position is vertical, and the unit snaps onto 60 mm busbar systems — a common panel layout for centralized motor control centers. The dimensions are 200 mm high, 45 mm wide, and 155.1 mm deep, with clearance requirements of 20 mm upwards, 10 mm downwards, and 9 mm at the side.