The SIEMENS 3RW5548-6HA14 is an industrial-grade digital soft starter from the powerful SIRIUS 3RW55 series, built to ensure smooth, shock-free startup of high-power three-phase motors up to 315 kW (Normal Duty) and 450 kW (Heavy Duty) at 400 V. Operating within a voltage range of 200–480 V AC, it significantly reduces mechanical wear and electrical current surges — ideal for demanding industrial applications.

Key Features

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

Rated Operational Current:
 • 570 A (Normal Duty)
 • 504 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)