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As versatile as your application

A new generation of soft starters for numerous drive tasks

The right soft starter for every application

SIRIUS soft starters are the best solution when direct or star-delta starting doesn’t apply to three-phase motors, because problems can often arise due to mechanical impact in the machine or voltage drops in the line supply.

Our range of soft starters with intelligent functions offers a soft alternative for almost any application, from simple to sophisticated drive requirements such as heavy-duty starting. They enable you to start three-phase motors smoothly, easily, and efficiently and implement reliable machine concepts.

Selecting and dimensioning the right soft starter
Start Simulation Tool
High Performance Sanftstarter
High performance

SIRIUS 3RW55 high performance soft starter

Thanks to its maximum functionality, the intelligent SIRIUS 3RW55 soft starter masters difficult startup and stopping processes in a soft manner. Integrated smart functions (such as pump cleaning, pump stop, automatic parameterization, and condition monitoring) support users in the smooth operation of their plant.

  • 3-phase control for optimal motor start
  • Engineering in TIA Portal
  • Various bus connections (PROFINET, PROFIBUS, Modbus)
  • Integrated operator panel with display
  • Electrical robustness
  • For drives in performance classes from 5.5 to 1,200 kW
General Performance Sanftstarter
General performance

SIRIUS 3RW52 general performance soft starters

The SIRIUS 3RW52 soft starter is the ideal alternative to star-delta starters. As an all-rounder, it is applicable for any type of drive.

  • 3-phase control for optimal motor start
  • Parameterization over rotary setting elements
  • Various bus connections (PROFINET, PROFIBUS, Modbus)
  • Operator panel with optional display
  • Electrical robustness
  • For drives in performance classes from 5.5 to 560 kW
Basic Performance Sanftstarter
Basic performance

SIRIUS 3RW30/3RW40 basic performance soft starters

Thanks to their compact design, SIRIUS 3RW30/40 soft starters are the ideal starter solution for standard applications.

  • 2-phase control for standard applications
  • Parameterization over rotary setting elements
  • Integrated motor overload protection and intrinsic device protection
  • Electrical robustness
  • For drives in performance classes from 1.5 to 250 kW