SMC Flex Low Voltage Soft Starters

Our SMC™ Flex Soft Starters are available with a current range from 5...1250 A. They feature integral bypass and flexible communications with advanced performance, diagnostics, and protection.

Popular Resources/Quicklinks
Smart Motor Controllers Soft Starters Family Brochure Controlling High Efficiency Motors Brochure Enclosed Smart Motor Controllers Product Profile


  • Provides 5…1250 A range
  • Uses rated voltage: 200…690V AC, 50/60 Hz
  • Includes nine start and stop modes
  • Includes three slow-speed modes
  • Offers pump control and braking control options
  • Provides built-in electronic motor overload protection
  • Provides built-in silicon-controlled rectifier (SCR) bypass/run contactor
  • Provides built-in multi-lingual, backlit LCD display for programming and monitoring
  • Offers optional communication modules support multiple networks
  • Programming via Connected Components Workbench™ software
  • Users who would like to take advantage of the additional functionality of SMC-50 soft starters, now have access to an internal bypass on that product line. Also, kits are now available to upgrade certain sizes of SMC-Flex controller to SMC-50 functionality. For information on selecting the appropriate SMC-50 to meet your current SMC-Flex application see the SMC Flex to SMC-50 With Internal Bypass Migration Solutions Profile
  • This product is designed for many applications that include compressors, chillers, pumps, conveyors, and crushers
Additional Information

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? Read the following blogs to learn more:

Product Selection


  • cULus Listed (Open Type) (File No. E96956, Guides NMFT, NMFT7)
  • CSA Certified (File No. LR 1234)
  • CE Marked
  • CCC Certified
  • Suitable for use with IE3 Motors (IEC 60034-30)
Standards Compliance


  • CSA C22.2 No.14
  • EN/IEC 60947-1
  • EN/IEC 60947-4-2
  • UL 508

    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
    SMC-Flex to SMC-50 with Internal Bypass Migration Profile MIGRAT-PP038
    Global Short Circuit Current Ratings Product Profile SCCR-PP003
    SMC-3, SMC Flex, and SMC-50 Smart Motor Controllers Technical Data 150-TD009
    SMC - When to Use a Soft Starter or AC Variable Frequency Drive White Paper 150-WP007
    SMC Flex Controllers User Manual 150-UM008
    ControlFLASH Firmware Upgrade Software 1756-UM105
    SMC Flex Controllers Quick Start 150-QS001
    DeviceLogix Technology for Industrial Applications 193-AT001
    SMC Flex Reduced Voltage Solid-State Smart Motor Controllers 150-SR002
    When to use a Soft Starter or an AC Variable Frequency Drive 150-SP007
    Literature LibraryLiterature Library
    Literature Library

    Browse Literature Library where you can search for additional technical and commercial publications in more languages.


    Search Literature Library

    KnowledgebaseKnowledgebase Support Center

    Visit our online resource for technical information, support chat and forums, software updates and product safety advisories/notices.


    Get Support


    • SMC Estimation Wizard — Obtain a more advanced analysis of both the device and the system.
    • SMC Thermal Wizard — Conduct simple thermal analysis and selection of an SMC product for a given application.