The Siemens 3RK1300-1GS01-0AA3 is an EM 300 DS electromechanical direct starter designed for the ET 200X distributed I/O system. It integrates a contactor, bimetal overload relay, and short-circuit protection into a single IP65-rated enclosure, so it lives directly on the machine frame rather than in a central panel. The setting range of 4.5 to 6.3 A covers small motor loads up to 2.2 kW at 400 V in AC-3 duty — that's the standard switching category for squirrel-cage induction motors during starting and running. Operating voltage is 400 to 500 V AC, and the unit includes a motor brake output for internally supplied brakes, which saves an external brake rectifier on the motor feeder.
PROFIBUS DP and bus communication
This starter communicates over PROFIBUS DP, so it plugs into the ET 200X backplane and reports status — overload trip, motor current, brake feedback — back to the controller without separate control wiring. The 9-pole motor feeder and 9-pole power connection handle both the motor power and the brake circuit through a single cable drop.
For a BOM line that calls out 3RK1300-1GS01-0AA3, the fit is confirmed by the setting range (4.5-6.3 A) and the AC-3 motor rating (2.2 kW at 400 V).