SIEMENS 3RW5558-6HA14 is a heavy-duty digital soft starter from the SIRIUS 3RW55 series, designed for smooth starting of three-phase motors up to 1200 kW. Operating within 200–480 V AC, it reduces mechanical stress and electrical surges, ensuring reliable performance in demanding industrial environments.

Key Features

Motor Power Rating:
 • 710 kW (Normal Duty)
 • 1200 kW (Heavy Duty) at 400 V AC

Rated Operational Current:
 • 1280 A (Normal Duty)
 • 1139 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: Optional PROFINET / PROFIBUS / Modbus modules
Degree of Pollution: 3 (as per IEC 60947-4-2)