The Siemens 3RK1300-0AS10-0AA3 is an EM 300 EDS electronic direct starter designed for the ET 200X distributed I/O family. It's a solid-state motor starter that combines a direct starter, motor protection, and switching in one IP65 enclosure — no separate contactor and overload relay needed. The setting range covers 0.6 to 2.18 A, which translates to 0.18 to 0.8 kW at 400 V AC-3 duty. That AC-3 rating means it's sized for starting squirrel-cage motors under load, not just resistive heaters. The solid-state switching contact means no mechanical wear on the main path — the starter handles millions of operations without contact erosion. Motor protection is also solid-state, so the trip curve stays consistent regardless of ambient temperature swings inside the enclosure. The unit communicates via PROFIBUS DP, so it plugs straight into a Siemens ET 200X station and reports status, current draw, and fault codes over the bus.
Where this starter fits a line
This is a distributed motor starter for a remote I/O cabinet or a machine-mounted junction box. The IP65 rating means the electronics are sealed against washdown and dust — fine for food-and-bev packaging lines, conveyor transfer stations, or any area where a central MCC panel isn't practical. The 134 mm depth, 140 mm width, and 270 mm height fit the ET 200X form factor; it mounts directly on the system rail alongside the ET 200X interface module and I/O slices. Power connection uses tab terminals (fast-on style) for the main circuit. Short-circuit protection is via external fuses — the unit itself has a breaking capacity of 100 A at 400 V, but the upstream fuse must be coordinated per the manufacturer's table. The starter includes a motor brake output, so it can handle a holding brake on vertical-axis motors without a separate brake rectifier.
The 0.6 to 2.18 A setting range covers small motors — think 0.18 kW up to 0.8 kW at 400 V AC-3. The 400 to 500 V operating voltage covers standard European 400 V three-phase networks and 480 V North American supplies. Ambient temperature range of 0 to 55 °C is typical for enclosed cabinets; no derating needed unless you're stacking units side-by-side without airflow. The minimum disconnection time is 1 second, so it's not for high-speed reversing applications — this is a start/run/stop starter, not a jogging device.