What this SIMATIC direct starter carries
The Siemens SIMATIC 3RK1301-0CB00-0AA2 is a direct motor starter rated for CLASS 10 trip protection, meaning it clears a locked-rotor condition within 10 seconds at the motor's cold-start current — standard for general-purpose induction motors on conveyors, pumps, and fans where quick overload clearance prevents winding damage. It's fed by a 24 V DC control supply (20.4 to 28.8 V tolerance) and handles a 50 kA prospective short-circuit current at 400 V, which is the SCCR the panel designer needs when coordinating upstream breakers in a high-fault industrial distribution. The unit mounts pluggable onto a terminal module — no hardwiring the power base — so a swap on a live line takes minutes, not hours. It sits in a 45 x 265 x 120 mm footprint, vertical or horizontal, and the 5g / 11 ms shock rating tells you it survives the vibration on a press or a crusher without nuisance trips.
Network and I/O profile
Dual-protocol onboard: PROFINET and PROFIBUS DP, so it drops into either a new PN line or a legacy DP daisy-chain without a gateway. The I/O map gives you 1 byte of inputs and 1 byte of outputs — enough for start/stop, fault reset, and status feedback to the PLC. No onboard digital I/O terminals (0 digital inputs, 0 digital outputs); the control signals come through the bus coupler. If you need local pushbuttons or indicator lights, you add them via a separate control module on the same terminal base.
Rated for pollution degree 3 at 400 V and degree 2 at 500 V per IEC 60664 / IEC 61131 — that's the standard for industrial enclosures where conductive dust or condensation is present. The product carries the SIMATIC brand and is designated as a motor starter.