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Bulletin 150 SMC-50 Solid-State Soft Starters

SMC-50 Solid-State Soft Starters

SMC™-50 Solid-state Smart Motor Controllers are available in three frame sizes and range from 180...520 A. This micro-processor based, fully solid-state soft motor starter helps maximize efficiency for motor starts and stops. The SMC-50 motor starter offers many advanced monitoring and protection features to help keep your application running smoothly and ease troubleshooting during downtime. These soft starters are available as part of the Enclosed SMC product family.

  • Overview
  • What's New
  • Product Selection
  • Specifications
  • Software
  • Documentation
  • Resources


  • 90…520 A range
  • Nine standard start modes
  • Rated voltage: 200…690V AC
  • Three expansion ports to install option modules
  • Fully solid-state, continuous SCR control
  • Built-in electronic motor overload protection
  • Current and voltage sensing on each phase
  • Metering
  • DPI Communication Protocol
  • Parameter configuration options
  • Energy saver mode
  • Logging of the last 100 events with time stamp
  • Network communication (option)
  • External bypass as an option
  • Conformally coated PCBs

Additional Information

Rockwell Automation Won or Shared First Place in 23 Categories

The SMC™-50 Solid State Soft Starters won first place in the Motor Starter category of the Control Design 2014 Readers Choice Awards.  Learn more about these awards and the other winning Rockwell Automation products.


SMC-50 Solid-State Smart Motor Controller User Manual150-UM011


  • cULus Listed (Open Type) (File No. E96956)
  • CE Marked per EMC Directive and Low Voltage Directive
  • CCC⋆ 
  • C-Tick⋆ 
  • GOST-R
  • KCC⋆ 
  • ABS

⋆For updated certification status of controllers with 24V DC control power, consult your local Rockwell Automation sales office or Allen-Bradley distributor.

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

Standards Compliance

  • UL 508
  • EN 60947-4-2

Looking for Additional Information?

To find additional product information (CAD drawing files, 3D models, etc.) enter the complete catalog number (including dashes) below.


Use Connected Components Workbench software with Microsoft Visual Studio® technology to program your SMC™-50 Soft Starter products.


Smart Motor Controllers Soft Starters Family Brochure150-BR144
Enclosed Smart Motor Controllers Product Profile150-PP007
Global Short Circuit Current Ratings Product ProfileSCCR-PP003
SMC-50 Solid-state Smart Motor Controller Selection Guide150-SG010
SMC - When to Use a Soft Starter or AC Variable Frequency Drive White Paper150-WP007
ControlFLASH Firmware Upgrade Software User Manual1756-UM105
SMC-50 Solid-state Smart Motor Controller User Manual150-UM011
More Soft Starter publications in Literature LibraryAll Languages

Can’t Find What You Need?

Browse our Literature Library where you can search for additional publications in more languages. You can also use the Advanced Search feature to search by catalog number, publication type, title, or keywords to narrow your results.

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.
  • eCADWorks — Select product 3D-CAD drawings in AutoCAD®. 
  • MCS Star — Configure a Modular Motor Control System.
  • ProposalWorks — Build complete quotes and proposals.

Other Resources

  • Firmware — Obtain firmware for your SMC Soft Starters from the Product Compatibility & Download Center.
  • Flash Update — Flash memory updates for smart motor controllers.
  • HyperTerminal Instructions — Instructions for firmware updates using HyperTerminal.
  • 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.