What this SIRIUS direct starter delivers
The Siemens 3RK1325-6KS71-0AA5 is a SIRIUS direct starter built for motor control in washdown or dusty environments — the IP65 enclosure means the housing and connections tolerate hose-down cleaning, so it suits food-and-bev or chemical processing lines. It's rated 0.75 kW at 400 V and offers selectable trip classes 5, 10, 15, and 20, letting you match the thermal curve to the motor's start profile: class 5 for fast-starting pumps, class 20 for high-inertia loads like conveyors. Power comes from a 24 VDC supply (20.4... 28.8 V), and the starter communicates over AS-Interface — no PROFINET or PROFIBUS DP onboard. It carries 4 digital inputs and 1 digital output, enough for local start/stop and feedback from a limit switch or sensor. The main circuit connects via an ISO 23570 HAN Q4/2 plug; device addressing uses an M12 plug.
The starter measures 294 mm wide, 215 mm high, and 159 mm deep. Mounting is by screw fixing in vertical, horizontal, or flat orientation — horizontal is recommended.