Siemens Soft Starter 3RW3028-1BB04

The Siemens 3RW3028-1BB04 is a soft starter from the SIRIUS 3RW30 series, designed for smooth starting of three-phase asynchronous motors. It reduces mechanical stress and current peaks during startup, which helps extend the lifespan of the equipment. 

Specification:

• Product Type: Soft starter
• Manufacturer Series: SIRIUS 3RW30, Size S0
• Rated Operational Current: 38 A at 40 °C
• Mounting: Screw and snap-on terminals for DIN rail mounting
• Dimensions (W x H x D): Approximately 45 mm x 125 mm x 150 mm
• IP Protection Class: IP20 on the front.

Features:

• Smooth Starting: The device reduces voltage fluctuations, current peaks, and mechanical stress when the motor starts, protecting the drive system.
• Energy Efficiency: The integrated bypass contacts minimize power loss through the semiconductors (thyristors) during normal operation, which significantly reduces heat dissipation in the control cabinet.
• Compact Design: The small dimensions of size S0 save valuable space within the control panel.