Welcome to
Johnson Electric Coil Company

Your Supply Chain Partner Since 1934

Johnson Electric Coil Company provides complete custom transformer and inductor design, engineering, manufacturing, product compliance and support services, all in Antigo, Wisconsin. Our custom design and manufacturing capabilities are some of the broadest in the industry; our products are the finest, most efficient, and fairly priced. Our goal is to provide a level of quality and service that enables our customers to be leaders in their market.

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Johnson Electric Coil Company

Manufacturer of Custom Isolation Transformers, Autotransformers, Inductors, and Chokes

We work with you, our customer, to ensure you get what you need, where you need it, when you need it. If you are looking for a top of the line custom transformer or inductor solution, look no further than Johnson Electric Coil Company, celebrating 85 years at the top of the industry.

We put the principles of Lean Manufacturing and 5S to work every day.

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CAD Supported Design Services

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Prototyping

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Manufacturing to Custom Specs

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Comprehensive assistance with product safety compliance to UL, CSA, & CE requirements involving all US & International Standards.

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Regulatory compliance support for RoHS, REACH, China RoHS, Conflict Minerals, EU BPR, EU POP, Low Halogen, California Proposition 65, and more.

Unified | Unselfish | Single Minded

Outstanding Customer Service

We fully support your safety agency approvals and regulatory compliance with experience-based expertise in both US and global requirements and standards.

And in addition to our specialty engineering and manufacturing services, we customize scheduling, packaging, shipping, billing, and communication practices to meet your unique inventory management, product handling, delivery, and customer service needs.

Our mission?  To provide a level of quality and service that enables you to be leader in your market!

While we mainly sell in the US, our products are found all over the world as components in OEM equipment. We pride ourselves on being the only transformer company our customers need.

Isolation Transformers

Johnson Electric Coil Company delivers real value with every order: Our custom single and three phase isolation transformers are carefully designed to meet your individual needs. From electrical performance and features to size, weight, and price, we optimize every design to serve you best. High quality, electric transformers up to 250kVA in a wide range of shapes and sizes, quantity production or one-off, we do it all!
Isolation Transformers

Autotransformers

Our single and three phase autotransformers are the best on the market, with special voltage requirements, mounting, and terminations for highly efficient performance and smooth installation. We build our custom autotransformers to meet your specifications.

Committed to providing the very best electric transformers for the job, Johnson Electric Coil Company offers premium single and three phase autotransformers for virtually any application.

Autotransformers

Toroidal Transformers

As a leading manufacturer of an impressive range of specialty electric transformers, we have learned that, depending on the unique requirements of some applications, a custom toroidal transformer may offer the best solution to provide cost-effective, high quality products to our customers. And like our other electric transformers, our toroids are well-designed and as reliable as they come. 

Toroidal Transformer

Inductors & Chokes

When it comes to inductors and chokes, only the best is good enough for your application. At Johnson Electric Coil Company, we design and manufacture high quality, custom single and three phase inductors and chokes for you, which is why our inductors and chokes are second to none in performance and value alike. Custom built electromagnetics to meet your needs, we do it all!

Inductors & Chokes

Johnson Electric Coil Company

OUR COMMITMENT TO YOU

As your supply chain partner, Johnson Electric Coil Company is committed to a level of quality and service that exceeds your expectations and enables you to lead in your markets.

We focus on complete design, engineering, and manufacturing services to provide you with the finest, most efficient, value-based, custom transformers and inductors anywhere. Our design and manufacturing capabilities are among the most versatile and progressive in the industry. And our wide and varied customers, like you, are the reason for everything we do.

In addition to our specialty engineering and manufacturing services, we customize scheduling, packaging, shipping, billing, and communication practices to meet your unique inventory management, product handling, delivery, and customer service needs.

We fully support your safety agency approvals and regulatory compliance with experience-based expertise in both US and global requirements and standards. While made solely in Wisconsin and sold mainly in the US, our transformers and inductors are incorporated in various equipment and systems around the world.

We are proud to be the only transformer company our customers need.

Johnson Electric Coil Company: great people, making great transformers, for great reasons!

Contact Us Today

We are happy to answer any questions you may have.
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