The SIEMENS 3RW5544-6HA14 is a powerful digital soft starter from the advanced SIRIUS 3RW55 series, engineered for smooth and reliable start-up of three-phase motors up to 132 kW (Normal Duty) and 250 kW (Heavy Duty) at 400 V. Operating within a voltage range of 200–480 V AC, it effectively reduces mechanical stress and electrical current surges, enhancing motor longevity and system performance.

Key Features

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

Rated Operational Current:
 • 250 A (Normal Duty)
 • 220 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 available
Degree of Pollution: 3 (as per IEC 60947-4-2)