The SIEMENS 3RW4028-1BB14 is a compact digital soft starter from the trusted SIRIUS 3RW40 series, designed for smooth and reliable start-up of three-phase motors up to 18.5 kW at 400 V. Operating within a voltage range of 200–480 V AC, it minimizes mechanical wear and electrical peaks during motor startup, thereby improving motor lifespan and system reliability.
Key Features
Motor Power Rating: Up to 18.5 kW at 400 V AC
Current Ratings:
• 38 A at 40°C
• 34 A at 50°C
• 31 A at 60°C
Control Voltage: 110–230 V AC/DC
Mounting: DIN rail mounting for easy and quick installation
Operating Temperature Range: –25°C to +60°C
Insulation Voltage: 600 V AC
Degree of Pollution: 3 (according to IEC 60947-4-2)