Soft starter for motor starting duty
The Siemens 3RW5224-1TC04 is a SIRIUS hybrid switching device — a soft starter that ramps motor voltage during start to limit inrush current and mechanical shock, then bypasses to a contactor for running. Rated supply voltage is 200 to 480 V AC, with a minimum operating current of 20 A — this sets the smallest motor it can control, not the full-load rating. Trip class is configurable: CLASS 10A (default), 10E, or 20E per IEC 60947-4-2, meaning it can be set for standard or extended acceleration time without nuisance tripping.
Panel fit and mounting clearances
Minimum clearances around the unit for airflow and access: 100 mm above, 75 mm below, 10 mm forward, 5 mm at the sides, and 0 mm behind. Mounting position allows +/- 10° rotation and can be tilted forward or backward on a vertical surface.
Fieldbus and control interfaces
Supports PROFIBUS, PROFINET standard, Modbus RTU, Modbus TCP, and EtherNet/IP — the control network integration is flexible across common industrial protocols. PROFIenergy profile is available when used with the PROFINET standard communication module, enabling energy management during idle phases. Control supply voltage is 24 V DC; remote reset is possible by cycling the control supply off and on. Firmware updates are supported, and an error logbook is available only with special accessories.
Environmental and compliance ratings
Pollution degree 3 per IEC 60947-4-2, suitable for industrial environments with conductive pollution. Shock resistance is 15 g / 11 ms, with potential contact lifting at 12 g / 11 ms. CE, UL, and CSA approvals are all documented — covering EU, US, and Canadian regulatory jurisdictions.
Application-specific starting features
Soft torque starting reduces mechanical stress on driven loads; pump ramp down function provides a controlled deceleration for pumping applications to prevent water hammer. Auto-reset is supported; minimum load is 15% relative to the smallest settable Ie. Service factor is 1, meaning no continuous overload margin beyond the rated current — the trip class handles acceleration overloads only. No analog output or torque control is provided; the HMI high feature is not available on this variant.