SMC-50 Soft Starters

SMC™-50 soft starters are available with a current range from 108…480 A. Our SMC-50 fully solid-state soft starters are available from 90...520 A. Advanced monitoring and protection functions, superior communication capability, and energy saver mode all help this soft starter increase efficiency and reduce downtime.

Popular Resources/Quicklinks
Smart Motor Controllers Soft Starters Family Brochure Controlling High Efficiency Motors Brochure Enclosed Smart Motor Controllers Product Profile
SMC-50 Soft Starters Now Available with Internal Bypass

This new offering combines the advanced functionality of the SMC™-50 control platform with the energy savings capabilities of an internal bypass power structure. After the motor has been started and reaches full speed, the controller closes the internal bypass contactors which increases energy efficiency and reduces heat output. This results in:

  • Reduced enclosure size
  • Reduced cost, avoiding the need for external bypass contactors

The SMC-50 fully solid-state unit continues to be available with normal and heavy duty ratings for customer flexibility in difficult and demanding applications.


  • Provides 90…520 A range with solid-state power structure
  • Provides 108...480 A range with internal bypass power structure
  • Uses rated voltage: 200…690V AC, 50/60 Hz
  • Includes 17 start and stop modes
  • Includes four special operating modes
  • Includes three hardware expansion ports
  • Provides built-in electronic motor overload protection
  • Offers optional communication modules that support multiple networks
  • Offers optional Parameter Configuration Module, Human Interface Module, or PC-based software for programming and monitoring
  • Programming via Connected Components Workbench™ software

Do you need a soft starter or an AC drive? What does your application require? When choosing between a soft starter and an AC drive what do you need to consider? Learn more in the following literature and blogs

To learn more about how the SMC-50 Soft Starter's unique starting and stopping profiles can meet your application needs, view this Virtual Demonstration. You can examine the construction and features of this soft starter in three frame sizes and in three dimensions. You will be able to peel back the product casing to see what is inside.

Product Selection


  • SMC-50 Solid-state
    • cULus Listed (Open Type) (File No. E96956)
    • CE Marked per EMC Directive and Low Voltage Directive
    • CCC
    • RCM
    • EAC
    • KCC
    • ABS
    • Suitable for use with IE3 Motors (IEC 60034-30)
  • SMC-50 Internal Bypass
    • cULus Listed (Open Type) (File No. E96956)
    • CE Marked per EMC Directive and Low Voltage Directive
    • CCC
    • RCM
    • EAC
    • KCC
    • ABS
    • Suitable for use with IE3 Motors (IEC 60034-30)
Standards Compliance
  • UL 508
  • EN 60947-4-2
Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.


Resource Publication Number Language
Smart Motor Controllers Soft Starters Family Brochure 150-BR144
Controlling High Efficiency Motors Brochure IE3-BR001
Enclosed Smart Motor Controllers Product Profile 150-PP007
Global Short Circuit Current Ratings Product Profile SCCR-PP003
SMC-3, SMC Flex, and SMC-50 Smart Motor Controllers Technical Data 150-TD009
SMC-50 White Paper - New Control Advances; Sensorless Linear Acceleration 150-WP005
Soft Starter Bypass Technology in Smart Motor Controllers 150-WP006
When to Use a Soft Starter or AC Variable Frequency Drive White Paper 150-WP007
SMC-50 Solid-state Smart Motor Controller for Managing Resistive Loads 150-WP008
Slow Speed Applications using a Soft Starter 150-WP009
SMC-50 Smart Motor Controller Quick Start 150-QS003
ControlFLASH Firmware Upgrade Software User Manual 1756-UM105
SMC-50 Solid-state Smart Motor Controller User Manual 150-UM011
How Do You Control an Electric Motor When the Communication Network Fails? CMPNTS-AT001
Using an SMC-50 Solid-State Smart Motor Controller for Pump Protection 150-AT003
Wye-delta and Solid-state Starters Application Guide 150-AT005
DeviceLogix Technology for Industrial Applications 193-AT001
SMC-50 Reduced Voltage Solid-State Smart Motor Controllers 150-SR004
When to use a Soft Starter or an AC Variable Frequency Drive 150-SP007
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Watch the following videos to see how our SMC-50™ soft starters are used in the following applications:

Water Pump

The SMC-50 soft starters use new soft start technology to provide torque and speed control for starting centrifugal pumps and high-inertia loads. Through proprietary sensorless speed sensing and motor control algorithms, the SMC-50 soft starter can deliver even smoother pump starts and stops than was possible with previous pump-control methods.

Rock Crusher

The SMC-50 soft starters deliver improved performance on high inertia loads such as rock crushers through linear acceleration technology and torque control. Limiting peak current and torque shock yields consistent starting performances. Through advanced control and monitoring uptime is maximized and the need for system maintenance is reduced.

Band Saw

The SMC-50 soft starters minimize starting peak current and torque shock to the system. Slow speed operation enables inspection of saw blade tracking before the motor is brought to full speed. The Smart Motor Braking option enables the system to stop in a fraction of the time of a coast stop.

Compression Tank

The SMC-50 soft starters use linear start technology which is ideal for both high and low pressure applications such as those found in compression tanks. This soft starter also has an energy saver mode which optimizes energy usage when running lightly loaded motors.