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Our Products

Why Custom Coils is the best choice?

Dependable Source...Built in the U.S.A.

Proven Leader in the Magnetics Industry.

Solid, Reliable Manufacturing Techniques.

Custom Designed and Built to your Specifications.

World Class Custom Transformers and Inductors

Welcome to Custom Coils, your go-to location for custom transformers and other specialty magnetic components. Companies all over the world that rely on magnetic components for their own production have trusted in Custom Coils to deliver the parts they need since 1967. Custom Coils not only manufactures parts like custom transformers, it also creates designs specifically to meet the needs of its individual clients.

Our products are manufactured in the United States in our Alcester, South Dakota headquarters. Since our inception, we have become a proven leader in the magnetic industry by building a reputation for dependability, for our use of solid, reliable manufacturing techniques and our willingness to custom design parts and build them to client specifications. Whether a client needs a custom transformer, DC igniters, antennas, air coils or beyond, we deliver world-class products with a level of service that is second to none.


  • Custom Coils adds a new high RPM multi-spindle winder to its production floor. The new spindl

  • Come join our production team. We are looking for motivated individuals to work in our produc

What clients
say about our

Custom Coils provides exemplary service to clients across the globe. Our products and services far exceed industry standards as well as client expectations. Hear it from our clients


We had been building an assembly that contained a shielded coil. Unknown to us, the pacific-rim supplier decided to end-of-life the coil. We needed Custom Coils to come up with a replacement part that we could continue to purchase. We emailed them our print and they designed a pin-for-pin compatible shielded coil fo..    

Buyer – Contract Manufacturer


I had a transformer that I was using. I liked its size and performance. However, we needed to add one more voltage tap and the standard production part did not offer this. So I took this concept to Custom Coils and they helped put together a design based off my transformer. So now we purchase this modified transf..    


Custom Coils
PO Box 348
109 Iowa Street
Alcester, SD 57001-0348

Phone No: 605.934.2460
Fax: 605.934.2440

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