The Siemens SIMATIC 3RK1301-1EB00-1AA2 is a reversing motor starter — a compact, networked motor control unit that handles forward/reverse operation without external contactors. It is designed for the SIMATIC ET 200pro distributed I/O family and mounts by plugging onto a terminal module. Rated supply is 24 V DC (20.4–28.8 V range), and it communicates over both PROFINET and PROFIBUS DP, making it a drop-in for Siemens-based automation architectures.
It is not sized for high-inertia loads that require a slower trip curve. This SCCR figure is typical for industrial distribution panels and means it can be installed downstream of a 50 kA-rated feeder without additional current-limiting protection. At 500 V the pollution degree drops to 2, which is the cleaner environment rating — so if you are running at 500 V line-to-line, the enclosure environment matters more. The vibration resistance is 2g, and shock resistance is 5g at 11 ms — both figures are for the unit mounted in its intended orientation (vertical or horizontal).
This is not a DIN-rail mount part — it fastens by plugging onto a terminal module (the ET 200pro base unit). Physical dimensions are 265 mm high, 90 mm wide, and 120 mm deep. That depth matters when planning enclosure depth, especially if the terminal module adds another 30–40 mm behind the mounting plane. The main energy infeed uses screw-type terminals, so the wireman needs a standard screwdriver — no special tooling. Digital I/O (1 input byte, 1 output byte) is handled through the control module, not onboard terminals.