Why Use C-Core Transformers?


Benefits of using C-Core vs EI Core Magnetics:


  • C-Core has less stray flux/magnetic field.
    • Great solution for audio/amplifier applications.
    • Minimize impact of transformer to surrounding components.
    • EI will require one or more of the following to minimize stray flux:
      • “Flux band” outside each winding.
      • Iron strap welded outside perimeter of core.
      • Potting into ferrous metal can.
  • C-core’s weigh less than EI due to rounded edges.
  • C-core fully utilizes grain orientation of steel (EI core typically uses 60%-80%).
  • Better utilization of steel means greater magnetic efficiency of C-Core.
  • C-core is typically higher priced than traditional EI due to less flexibility to adjust core size of C-core.
  • Industry is limited on core size availability
  • Sources:

To request product literature please visit us at PowerVolt or call us at 630-628-9999.


PowerVolt has been producing quality custom and pre-designed transformers for over 30 years. Our Quality Policy is simple, and effective:

  • Compliance to Requirements.
  • Continual Improvement.
  • Personal Pride in our Work.

Feel free to take advantage of our pre-designed models, or let us customize a transformer to your particular needs. Either way, you've come to the right place