IEC Starter Mounting Systems

Bulletin 141A Modular Control System (MCS) Mounting Systems provide several different mounting solutions for IEC loadfeeders. Factory-assembled Bulletin 103 Non-Reversing and Bulletin 107 Reversing starters are available for these mounting solutions. Our mounting systems include preconfigured circuit breaker modules for feeding and protecting a busbar system. For applications up to 100 A, we now offer the 141C CrossBoard System, a true plug and play system.

Popular Resources/Quicklinks
Global Short Circuit Current Ratings Product Profile IEC Busbar Mounting System Selection Guide MCS Star Configuration Software Tutorial


  • Provides reduced wiring and assembly time for cost savings
  • Includes efficient design with decreased panel space
  • Includes high-fault short-circuit systems ratings
  • Offers three mounting methods - 141A
  • Uses MCS Star configuration software - 141A
  • Offers up to 100 A – CrossBoard
  • Provides high degree of safety with IEC 61439 and UL 508 standard ratings, including IP20 touch-safe protection - CrossBoard

See ProposalWorks or MCS Star for a full list of the system components.  Here is a sample list of the components that can be mounted on a Modular Control System:

  • Contactors: 100-K, C, and E
  • Motor Protection Circuit Breakers: 140G
  • Motor Circuit Protectors: 140M
  • Molded Case Circuit Breakers: 140MG
  • Electronic Overload Relays: 193E
  • Thermal Overload Relays: 193-K, T1
  • Safety Contactors and Control Relays: 100S, 700S
  • Control Relays: 700-CF, CFB, 700-K

Product Selection


  • CE
  • cULus
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
Global Short Circuit Current Ratings Product Profile SCCR-PP002
IEC Busbar Mounting System Selection Guide 141A-SG003
MCS Star Configuration Software Tutorial 141A-IN003
Bulletin 141A Mounting System Temperature Rise Calculation Software Tutorial 141A-IN004
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