What this reversing starter is and where it fits
The Siemens 3RK1300-0GS01-1AA4 is an electromechanical reversing starter from the SIRIUS 3RK1 family, designed as a compact motor control unit for the ET 200X distributed I/O system. It combines two contactors and a bimetal overload relay in one IP65 enclosure, rated at 0.18 kW for AC-3 duty at 400 V with a setting range of 0.45 to 0.63 A. The IP65 rating means the enclosure is dust-tight and protected against low-pressure water jets — suitable for washdown environments on conveyors, packaging lines, and material handling equipment where the starter mounts directly on the machine frame rather than in a control cabinet. Built-in PROFIBUS DP communication allows the starter to be addressed directly from a PLC over the fieldbus, eliminating separate I/O wiring for start, stop, and direction commands. The integrated motor brake output handles DC braking for motors up to 500 V / 1 A, which is common for holding brakes on vertical-axis or palletizing applications.
Key ratings and what they mean for fit
The AC-3 rating of 0.18 kW at 400 V defines the maximum three-phase induction motor this starter can switch under full load — typical for a small conveyor drive, agitator, or fan up to roughly 0.25 hp. The setting range 0.45 to 0.63 A on the bimetal overload matches the full-load current of such a motor; set it to the motor nameplate FLA. Short-circuit breaking capacity is 50 A at 400 V, meaning the integrated circuit-breaker-style short-circuit protection can safely interrupt a fault up to that level without upstream device coordination issues in most 16 A or 20 A branch circuits. Operating voltage of 400 to 500 V AC covers standard European 400 V three-phase networks and 480 V North American systems. The DC control voltage type means the coil and brake circuit are DC-powered — verify your control supply polarity and free-wheel diode if driving inductive loads. Ambient temperature range 0 to 55 °C limits installation to indoor or sheltered locations; the IP65 housing protects against washdown but not against freezing or sustained high heat.
Physical dimensions and panel integration
The enclosure measures 270 mm high, 140 mm wide, and 134 mm deep. This is a standalone IP65 housing with tab terminals for the main current circuit — it does not snap onto a DIN rail but bolts directly to a mounting plate or machine frame. Plan for cable entry via PG glands or M20 knockouts; the 9-pole motor feeder and 9-pole power connection require two multi-conductor cables.