The Siemens 3RK1301-1FB00-1AA2 is a SIMATIC reversing motor starter, designed for motor control in industrial automation panels. It is rated for a supply voltage of 24 V DC (permissible range 20.4 to 28.8 V) and carries a Trip Class 10, meaning it will trip within 10 seconds at a locked-rotor current of 7.2× the full-load current — standard protection for standard induction motors. The unit integrates PROFINET and PROFIBUS DP protocols for fieldbus communication, and its main energy infeed uses screw-type terminals.
The starter mounts pluggably onto a terminal module (fastening method: pluggable on terminal module), which simplifies panel wiring and replacement without disturbing the main power connections. It occupies a footprint of 90 mm width, 265 mm height, and 120 mm depth. Mounting position is vertical or horizontal. The unit is rated for vibration resistance of 2g and shock resistance of 5g / 11 ms, suitable for installation on machinery subject to moderate vibration. Pollution degree 3 at 400 V per IEC 60664 / IEC 61131 means it tolerates conductive pollution in industrial environments — no additional conformal coating required for typical panel conditions.
Key Ratings & So-What
The reversing starter design allows forward and reverse motor operation without external contactors — controlled via the fieldbus (PROFINET or PROFIBUS). The maximum operating frequency is 750 operations per hour, so it is suited for frequent start/stop cycles but not for high-speed indexing. With bypass circuit, power dissipation is 4.1184 W; without bypass, 4.118 W — negligible for panel thermal budgeting.