Transformer design worksheet
Inductor Finders Power  |   RF
Power Magnetics Tools
RF Inductor Tools
CM Choke \ Ferrite Beads
LC Filter Designer
IC / Inductor Match Tool
Application Notes
Other Resources
Designer's Kits

Custom Transformers

Coilcraft specializes in transformers for high frequency, switch mode converters. We offer many off-the-shelf transformers that may meet your specific requirements. See a listing of our standard flyback transformers to determine if one fits your application.

If none of the transformers meets your requirements, please fill out the Power Transformer Design Worksheet.

Firefox and Chrome users – if the form does not display red boxes denoting required fields, please save the PDF form before filling out. Then email the completed form to

After completing the worksheet, click the Submit button to email the form. Attach any additional information to the email, such as a schematic or specific design criteria,  before sending.

We will contact you with any questions we may have.


Your comments and suggestions are welcome. Contact [email protected]
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Updated: April 16, 2018