The Siemens 3RK1303-6ES84-3AA3 is a solid-state reversing starter in the SIRIUS 3RK13 family, designed for motor control in industrial automation. It switches motor loads up to 4 A in AC-3 duty at 400 V, so it handles reversing applications on small conveyors, pumps, or fan drives without mechanical contact wear. Rated for a 400 to 500 V operating voltage, it carries a 100 kA short-circuit current rating at 400 V — meaning it safely interrupts faults up to that level without cascading upstream, which simplifies panel coordination. The IP65 rating means the enclosure is dust-tight and protected against water jets, so it can be mounted directly on machine frames or in washdown zones without a separate panel.
Communication and I/O
This starter communicates via PROFIBUS DP, not PROFINET, so it integrates into existing DP networks — useful for legacy line architectures or where deterministic fieldbus cycles are preferred. It provides 4 digital inputs, 2 of which are on M12 sockets for sensor feedback, and 0 digital outputs. The digital inputs are parameterizable, so you can configure them for start/stop, reversing commands, or interlock signals through the bus.
Protection and Environmental
Full motor protection is integrated, with solid-state switching contacts that eliminate arcing wear. Short-circuit protection is fuse-based, which is typical for solid-state starters to handle fault currents up to 100 kA. Operating temperature range is -20 to +40 °C, so it's suitable for unheated plant floors but not for environments exceeding 40 °C ambient without derating. Dimensions are 250 mm tall, 130 mm wide, and 125 mm deep — a compact footprint for a reversing starter with integrated bus communication.
Sourcing and Lifecycle
For a BOM line requiring this exact code, the supply posture is quoted to order — specify the part into your design with confidence that it remains a supported, catalogued item.