The Siemens 3RK1300-0AS10-1AA3 is an EM 300 ERS electronic reversing starter, part of the SIRIUS family, designed for the ET 200X distributed I/O system. It combines a solid-state reversing starter with integrated motor protection, a brake contact output, and PROFIBUS DP communication in a single IP65-rated enclosure. The current setting range of 0.6 to 2.18 A covers small three-phase motors in the 0.18 to 0.75 kW range at 400 V AC-3 duty. That means it directly handles reversing applications — conveyors, small hoists, gate drives — where you need to reverse the motor direction without an external contactor pair.
IP65 and deployment context — where this starter lives
Rated IP65, the 3RK1300-0AS10-1AA3 is built for on-machine mounting in washdown or dusty environments — think food processing, packaging lines, or material handling where the starter sits near the motor, not in a remote cabinet. The 134 mm depth, 140 mm width, and 270 mm height fit the ET 200X form factor, so it mounts directly on the machine frame or a sub-panel. The power connection uses tab terminals, and the integrated brake contact output controls the motor brake directly. Operating ambient temperature is 0 to 55 °C.
Fieldbus integration and short-circuit protection
PROFIBUS DP is onboard, so this starter communicates directly with a PLC over the fieldbus — no additional gateway or I/O block. The bus communication function is standard, meaning you get motor status, fault diagnostics, and start/stop/reverse commands over the network. Short-circuit protection is by external fuses; the maximum short-circuit breaking capacity (Icu) at 400 V is rated at 100 A. That's the fault current the device can safely interrupt when paired with the correct upstream fusing.