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
  • 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
  • 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
  • This product is designed for many applications that include compressors, chillers, pumps, conveyors, and crushers.

SMC Flex Low Voltage Soft Starters

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)
Looking for Additional Information?

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


Use Connected Components Workbench software with Microsoft Visual Studio® technology to program your SMC™ Flex Soft Starter products.


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
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Configuration & Selection Tools

  • CrossWorks — Convert competitive catalog numbers to similar Allen-Bradley® products.
  • ProposalWorks — Build complete quotes and proposals.

Other Resources

  • Firmware — Obtain firmware for your SMC Soft Starters from the Product Compatibility & Download Center.
  • Procurement Specifications — Visit our online resource to find the procurement specifications for this product.
  • 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.
  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices.

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