SIMATIC motor starter with PROFINET and PROFIBUS DP
The Siemens 3RK1301-0CB10-0AB4 is a SIMATIC-branded motor starter in a direct-start configuration, designed for remote I/O and fieldbus integration. It supports both PROFINET and PROFIBUS DP protocols, making it a drop-in component for Siemens-based control architectures.
Trip class flexibility and short-circuit withstand
The starter supports trip classes 5, 10, 15, and 20, selectable per application. Class 10 is the standard for general-purpose motor starting; class 20 accommodates high-inertia loads like fans or centrifuges where the start time exceeds 10 seconds.
Physical dimensions and panel mounting
The module measures 150 mm deep, 65 mm wide, and 290 mm tall. It mounts vertically or horizontally and fastens by plugging onto a terminal module — no separate DIN-rail clip required, which saves rail space in dense panels. Shock resistance is 5g at 11 ms, vibration resistance is 2g — adequate for most industrial cabinet environments.
Environmental ratings and installation conditions
Pollution degree is rated 3 at 400 V and 2 at 500 V per IEC 60664 (IEC 61131). Two digital inputs are available on the control module for local pushbuttons or sensor feedback, supplementing the fieldbus I/O.
The main energy infeed uses screw-type terminals; the energy bus carries power between modules. Confirm the mating terminal module and busbar configuration before specifying.