The Siemens 3RK1301-0CB10-0AA4 is a SIMATIC-branded motor starter — a direct starter designed for 24 V DC control voltage, with PROFINET and PROFIBUS DP onboard. It's the kind of part you'd spec into a motor control center or a distributed automation cabinet where you need coordinated motor protection and fieldbus integration in one package. The adjustable trip class (CLASS 10 and 20) means you can match the overload curve to the motor's starting profile — CLASS 10 for faster-starting loads like pumps and fans, CLASS 20 for higher-inertia loads like conveyors or crushers that take longer to spin up. That adjustability saves stocking a separate overload relay for each application. Pollution degree 3 at 400 V per IEC 60664 means it's rated for the conductive-dust and humidity conditions typical of industrial enclosures.
Footprint is 65 mm wide by 290 mm tall by 150 mm deep. Mounting position is vertical or horizontal. Fastening is pluggable on a terminal module — the power and control wiring lands on a fixed base, and the starter module itself clips on top. That means you can swap the electronics without pulling wires, which cuts downtime during a replacement.
Shock rated at 5g for 11 ms, vibration at 2g.