OUR PRODUCTS

  • High Voltage Transformer
    High Voltage Transformer

    Creating custom transformers designed for high voltage is one of our specialties.

  • Switchmode Transformer
    Switchmode Transformer

    Electronic applications often call for the use of switch mode transformers. We custom design and build these to meet client’s specific needs.

  • Flyback Transformers
    Flyback Transformers

    Our typical custom transformers that fit the power category range from dime size to large car battery size

  • Trigger Pulse Transformers
    Trigger Pulse Transformers

    With growth in the production of lasers and flash lamps, the need for trigger transformers is on the rise.

  • Step Up / Down Transformer
    Step Up / Down Transformer

    Our typical custom transformers that fit the power category range from dime size to large car battery size.

  • Power Transformer
    Power Transformer

    Creating custom transformers designed for high voltage is one of our specialties.

  • Toroidal Transformers
    Toroidal Transformers

    With growth in the production of lasers and flash lamps, the need for trigger transformers is on the rise.

  • Antennas and Air Coils
    Antennas and Air Coils

    Electronic applications often call for the use of switch mode transformers. We custom design and build these to meet client’s specific needs.

  • Down Hole Application
    Down Hole Application

    As a custom transformer and inductor manufacturer for 40+ years, we have built downhole magnetics for a variety of downhole customers.

  • DC Igniters
    DC Igniters

    Custom Coils is a custom transformer and inductor manufacturer that has been involved in winding and building 12V DC igniters for almost 20 years.

  • High Current Inductors
    High Current Inductors

    High current inductors take on many shapes and sizes. Custom Coils has several series of axial leaded, radial leaded and drum core shaped inductors available.

  • Custom Manufacturing
    Custom Manufacturing

    When magnetic components are essential for your company’s production, Custom Coils delivers. We have been in the custom transformer winding industry since 1967. Our experience and diverse collection of winding equipment gives us the ability to manufacturer almost any type of transformer, inductor or coil.

  • Hydrogen Coil
    Hydrogen Coil

    Custom Coils is a U.S.-based manufacturer of custom transformers and inductors. We have been involved in the winding and building of hydrogen (H2) generator coil designs for decades and bring expertise and precision to every job.

Why Custom Coils is the best choice?


  • Dependable Source...Built in the U.S.A.
  • Solid, Reliable Manufacturing Techniques
  • Proven Leader in the Magnetics Industry
  • 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.

At Custom Coils, our clients are the backbone of our business. To meet their unique needs, we employ a staff of more than 100 employees to serve 140-plus active accounts. Ensuring that an outstanding level of service is maintained for all accounts is priority No. 1. We achieve this by offering personalized service to each customer. Our engineers build their own samples and customer service is provided directly by a key manager. Our top management even visits all customers directly to ensure maximum satisfaction with our products.

When your company needs a custom transformer and other magnetic components, Custom Coils is ready to deliver. With more than 40 years in the industry, we have become the trusted go-to location for these parts by companies all over the world.

04/19/13

Custom Coils adds new high RPM multi-spindle winder to its production floor. The new spindle winder will help increase throughput by reducing wind times. The new winder is just coming on line and production parts will be phased in on the new machine.

04/24/13

Come join our production team. We are looking for motivated individuals to work in our production area. We are seeking people interested in either Full-Time or Summer Help. Operate small machines in a clean, safe, well lit, comfortable work environment.

Paid Holidays and Vacation

Health Insurance with prescription drug coverage

Paid Life Insurance

40 hour work week (7:00-4:30 -Mon.-Thurs., 7:00-11:00 - Friday)

Testimonials

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 transformer from them.

Engineer – Oil Exploration

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 for us. This kept us from having to re-layout our board. That really helped us out.

Buyer – Contract Manufacturer