The SIEMENS 3RW5547-6HA14 is a heavy-duty digital soft starter from the advanced SIRIUS 3RW55 series, designed to provide smooth and efficient start-up of three-phase motors up to 250 kW (Normal Duty) and 400 kW (Heavy Duty) at 400 V. With an operational voltage range of 200–480 V AC, this unit effectively reduces mechanical stress and electrical current surges, ensuring extended motor life and improved system performance in industrial applications.

Key Features

Motor Power Rating:
 • 250 kW (Normal Duty)
 • 400 kW (Heavy Duty) at 400 V AC

Rated Operational Current:
 • 470 A (Normal Duty)
 • 416 A (Heavy Duty)

Control Voltage: 110–250 V AC/DC
Mounting: Panel mounting with screw fixing
Integrated Bypass Contact System: Yes
Operating Temperature Range: –25°C to +60°C
Insulation Voltage: 600 V AC
Degree of Protection: IP20
Communication: Supports optional PROFINET / PROFIBUS / Modbus modules
Degree of Pollution: 3 (according to IEC 60947-4-2)