The Siemens 3RA6250-1CP33 is a SIRIUS compact reversing starter — a single-device package that combines a contactor, overload relay, and reversing interlock for a 3-phase motor, rated for continuous operation per IEC 60947-6-2. Its headline motor rating is 1500 W at 400 V (roughly 2 hp), with a 0.75 hp rating at 200/208 V, and it carries a 53 kA breaking capacity at 400 V — meaning it can safely interrupt a fault current up to that level without upstream devices needing to clear it, which simplifies panel coordination. The control circuit accepts AC or DC from 110 to 240 V at 50/60 Hz, drawing only 6 W AC or 5.1 W DC — a low burden on the control transformer. Trip class is adjustable between CLASS 10 and CLASS 20, so you can set it for standard motor start (Class 10) or longer acceleration times (Class 20) without swapping the overload block.
Mounting, wiring, and panel fit
The main circuit connects via plug-in terminals (no terminals included — order separately), accepting solid wire from 0.5 to 4 mm² or two conductors from 0.5 to 2.5 mm² per clamp. Three integrated LEDs give local status indication for run, fault, and power — useful for a quick visual check without a meter.