Siemens SIRIUS 3RW3027-1BB04 Soft Starter, S0, 22 A, 11 kW, 200-460 V AC, 400 V AC Control, Screw Terminals

Soft starters from the SIRIUS 3RW30 series provide a reliable and efficient method for starting three-phase asynchronous motors. The Siemens 3RW3027-1BB04 delivers smooth, jerk-free starting and stopping, reducing mechanical stress on the driven machine and preventing voltage dips in the supply network. With a rated operating current of 22 A and a rated power of 11 kW at 400 V, this compact S0 frame unit is ideal for a wide range of industrial applications. The integrated bypass contact system minimizes power loss during continuous operation, ensuring energy-efficient performance without the need for additional wiring.

Advantages

This soft starter offers soft starting and stopping functions, which significantly extend the service life of motors and mechanical components. The integrated bypass reduces heat generation and energy consumption. Its compact S0 size saves space in control cabinets, while screw terminals simplify installation. The device is suitable for use in ambient temperatures from -25 °C to +60 °C and meets international standards including CE, UL, CSA, CCC, and EAC.

Suitable for

• Conveyor belts and material handling systems
• Pumps, fans, and compressors
• Small to medium-sized machines in industrial automation
• Applications requiring reduced starting current and torque

Key specifications

• Rated operating current: 22 A (at 40 °C)
• Rated operating power: 11 kW at 400 V
• Rated operating voltage: 200–460 V AC, 50/60 Hz
• Control supply voltage: 400 V AC
• Frame size: S0, width 45 mm
• Connection: Screw terminals
• Degree of protection: IP20
• Integrated bypass: Yes

Recommendations

For reliable motor starting in demanding environments, pair this soft starter with appropriate motor protection such as a circuit breaker or overload relay. Ensure proper ventilation and adhere to mounting clearances for optimal performance.