The Siemens 3RK1300-1FS01-1AA1 is an electromechanical reversing starter from the SIRIUS family, designed for direct-on-line reversing of three-phase motors up to 1.9 kW at AC-3 duty on a 400 V supply. The setting range covers 3.5 to 5.0 A, with bimetal overload protection built in. It includes an integrated brake output rated DC 24 V / 3 A for externally supplied brakes, and communicates via PROFIBUS DP. The IP65 enclosure means the unit is suited for washdown or dusty environments — no separate cabinet needed if the area is rated for it.
Integration Notes
Mounts on a standard DIN rail — the 140 mm width and 270 mm height fit a typical motor control center bucket or IP65 enclosure backplate. The main current circuit connects via tab terminals; the 9-pole motor feeder and power connection are pre-wired for a standard reversing scheme. The PROFIBUS DP interface allows direct connection to a PLC without a separate gateway, reducing cabinet wiring. Operating ambient temperature range is 0 to 55 °C, so no forced cooling is needed in most conditioned enclosures. The maximum short-circuit breaking capacity at 400 V is 50 A — coordinate upstream protection accordingly.