Siemens Sirius 3RT1966-4G Soft Starter Module is a Sirius-branded motor-start control device (part number 3RT1966-4G). It provides soft-start functionality for AC motors, helping to limit inrush current and enable controlled ramping during startup and shutdown. As part of the Sirius soft-starter family, it is designed for integration into electrical control panels within Siemens automation systems to support smooth motor operation and reduced electrical stress on the power network.
