The Siemens 3RK1322-0GS02-1AA3 is an AS-Interface compact reversing starter in the SIRIUS family — a self-contained motor starting and protection unit rated for 0.18 kW at AC-3 / 400 V, with a bimetal overload setting range of 0.45 to 0.63 A. The electromechanical reversing contactor pair is built into an IP65 enclosure, so it mounts directly on the machine frame or conveyor section without a separate control panel. It communicates over the AS-Interface bus and includes a motor brake output and two integrated digital inputs for local start/stop or sensor feedback.
What the ratings mean for fit
The 0.18 kW AC-3 rating at 400 V defines the maximum three-phase induction motor this starter can switch under full-load starting conditions — typical for a small conveyor, pump, or agitator drive. The 0.45–0.63 A setting range means the bimetal overload is sized for the motor's full-load current; if your motor draws outside that window, this unit won't protect it. The 50 kA short-circuit breaking capacity (Icu) at 400 V means it can safely interrupt a fault current up to that level without upstream fuses needing to clear first — important for high-fault installations where the available short-circuit current at the motor terminal is high.
Where it goes and how it connects
This IP65 reversing starter is designed for distributed motor control — mounted on the machine frame, not in a central panel. The main current circuit connects via tab terminals, and the 9-pole motor outgoing feeder and 9-pole power connection handle the motor cable and control wiring. The AS-Interface bus connection carries both the control commands and the 24 V DC power for the electronics. The integrated brake output saves an external contactor for motors with DC brakes. Dimensions are 270 mm high, 120 mm wide, 190 mm deep.