The Siemens 3RK1300-0BS10-0AA0 is a direct starter with solid-state switching contacts and integrated motor protection, rated for 6 A in AC-3 duty at 400 V — enough to handle a 2.2 kW motor on a conveyor, pump, or fan. The solid-state design means no contact wear from repetitive starts, which is the main reason you'd spec this over a conventional contactor for high-cycle applications.
Ratings and what they mean for fit
The AC-3 rating of 6 A at 400 V is the motor-switching current — this is the figure that decides whether the starter can handle your induction motor's starting inrush and running load. The 100 A rating at 400 V is the short-circuit current the device can withstand, not the continuous load; that 100 A figure tells you the upstream protection must limit fault energy to that level. The operating voltage range is 400 to 500 V AC, so it fits standard 400 V and 480 V line supplies common in European and North American panels. Control supply is 24 V DC, with a tolerance of 20.4 to 28.8 V DC. That's a standard PLC-side voltage; the 24 V bus powers the electronics and the PROFIBUS DP interface. No digital I/O on board — this starter is a pure motor actuator on the bus, not a local I/O block. IP65 protection means the enclosure is dust-tight and protected against water jets — suitable for washdown areas in food processing or outdoor installation under a canopy. The 270 mm height, 140 mm width, and 134 mm depth are the enclosure footprint; plan for that volume in the panel layout.
Deployment context
This direct starter connects to the main energy infeed and load-side outgoing feeder via sockets conforming to ISO 23570 — that's a standardized interface for modular motor starters in distributed automation architectures. Supply voltage and communication (PROFIBUS DP) come through the backplane bus, so the unit is designed for a multi-station rail system, not as a standalone panel-mount device. The three-pole main current circuit handles three-phase motor loads.