The Siemens 3RA6250-2EB34 is a SIRIUS compact reversing starter rated for 15 kW at 400 V with a 53 kA breaking capacity at that voltage — enough to handle motor faults on a 400 V line without cascading upstream. The adjustable trip class (10 or 20) lets you match the overload curve to the motor's start profile: Class 10 for fast-starting pumps and fans, Class 20 for high-inertia loads like conveyors or crushers that need a longer acceleration window.
Control voltage and wiring
Control voltage is 24 V AC/DC — the coil accepts both, so you can land it on a 24 V DC PLC output or a 24 V AC control transformer without a separate rectifier.