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.

Bulletin 150 SMC Flex Low Voltage Soft Starters
  • Overview
  • Product Selection
  • Specifications
  • Software
  • Documentation
  • Resources


  • 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

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? Learn more in the following literature and blogs
  • This product is designed for many applications that include compressors, chillers, pumps, conveyors, and crushers.

To view commonly ordered and quickly available products, use the Product Configuration Assistant for our complete product offerings.


SMC™ Flex Specifications Technical Data150-TD006


  • 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)

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Standards Compliance

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

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.


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


Smart Motor Controllers Soft Starters Family Brochure150-BR144
Controlling High Efficiency Motors BrochureIE3-BR001
Enclosed Smart Motor Controllers Product Profile150-PP007
Global Short Circuit Current Ratings Product ProfileSCCR-PP003
SMC-3 and SMC-Flex Smart Motor Controllers Selection Guide150-SG009
SMC™ Flex Specifications Technical Data150-TD006
SMC - When to Use a Soft Starter or AC Variable Frequency Drive White Paper150-WP007
SMC Flex Controllers User Manual150-UM008
ControlFLASH Firmware Upgrade Software1756-UM105
SMC Flex Controllers Quick Start150-QS001
Bulletin 150 SMC Flex Controllers Application Guide150-AT002
DeviceLogix Technology for Industrial Applications193-AT001
SMC Flex Reduced Voltage Solid-State Smart Motor Controllers150-SR002
When to use a Soft Starter or an AC Variable Frequency Drive150-SP007
More Soft Starter publications in Literature LibraryAll Languages

Can’t Find What You Need?

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

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

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.