Siemens SIRIUS 3RW50 SoftStarter – Find comprehensive resources for Siemens SIRIUS 3RW50 Softstarter, including product catalogs, manuals, price list, programming guides, fault, alarm, warnings & software support. Get expert assistance for troubleshooting and optimization.

Siemens SIRIUS 3RW50 soft starters are categorized within Siemens’ “Basic Performance” range. This means they are designed to provide essential soft starting functionality for standard motor applications.
- Power rating: 75 to 315 kW (at 400 V).
- Two-phase controlled for standard applications
Features
- Two-phase controlled for standard applications
- Parameterization with rotary potentiometer
- Optional communications interface (PROFINET, PROFIBUS, EtherNet/IP, Modbus)
- Visualization of motor data via optional HMI or analog output
- Integrated motor overload and intrinsic device protection
- Engineering in the TIA Portal
- ATEX/IECEx-certified for use in hazardous areas
Product characteristics/function
- Hybrid switching technology and 2-phase motor control
- Small and compact design
- TIA integration – communications modules and HMI modules optional
- Motor overload and intrinsic device protection without additional wiring
- Soft Torque
- Parameterization using potentiometers
- Wide range for control supply and main voltage
- Certified according to ATEX/IECEx directive
Performance features/benefits
- Minimum power loss and optimized motor control by avoiding DC components
- Space-saving, clearly arranged control panel layout
- Efficient configuration and maximum flexibility in automation engineering
- Adjustable trip classes, integrated diagnostics functions
- Reduced mechanical loading and optimum pump stop
- Simple and fast commissioning
- Low variance, high system availability even with weak supply networks
- Suitable for the starting of explosion-proof motors with “increased safety” type of protection
Applications:
- Conveyor systems
- Pumps
- Agitators
- Belt conveyors
- and other applications requiring controlled motor starting and stopping
Siemens SIRIUS 3RW50 soft starters provide a reliable and economical solution for basic motor starting applications. This soft starters are suitable for a variety of standard applications, especially where basic soft starting is sufficient.