Manufacturer of Electrical Transformers, Inductors and Coils

Prem Magnetics is a trusted transformer manufacturer, crafting electrical transformers, inductors and coils that are made in the USA.
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Trusted Inductor, Coil, and Transformer Manufacturer in the USA

Prem Magnetics is a world-class inductor, coil, and transformer manufacturer, and most of our products are made here in the United States. Custom coil manufacturing is what we’re known for, but we also offer a selection of standard electrical transformers and inductors to complement our custom coil winding services.
As experts in electromagnetic coils, we can consult with your team, create designs, and build new prototypes and production-grade parts for your electronics applications.
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Full-Service Custom Coil Winding

Coil manufacturing is our specialty. We offer a full-service solution for the creation of new custom transformers, inductors, and electromagnetic coils.

Design Services

We can design a new custom coil built to your specifications or modify an existing design.

3D Printed Bobbins

We create production-grade 3D printed bobbins, to create the perfect form for your new coil.

Prototypes

Ask our team to make a prototype coil, so you can test and take your product to market with confidence.

Coil Winding

We’re known for our coil winding services, for custom transformers, inductors, and electromagnetic coils.
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Custom Transformers

We’ve taken our role as a transformer manufacturer to the next level; in addition to our standard electrical transformers, we craft custom transformers for new products and innovative projects. From aerospace to audio, custom power transformers to custom impedance matching transformers, we will work with you to create the optimal custom transformer for your application. Rest assured, we’re experts in electrical transformers.
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Custom Inductors

We produce custom inductors, chokes, and reactors for your niche application, including prototype and production-grade inductors. Whether you need a choke with an inductance of 0.9µH at 13.0ADC, 22mH at 2.4ADC, or anything in between, we can produce the fully tested, high-quality part you need. Our specialties also include custom air core inductors.
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Custom Coils

Our custom coil winding services cover requests for a wide range of different electromagnetic coils. From coil winding for engineering projects to medical grade coil winding, linear coil winding to bifilar and trifilar coil winding, we meet complex coil manufacturing needs every day. Our custom coil winding services also include custom solenoid coils and custom coil assemblies.
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Standard Electrical Transformers, Inductors, & Coils

Although custom transformers are our specialty, we also offer a range of standard electrical transformers, inductors, and electromagnetic coils, available to add to your cart and purchase online now for your convenience.

We can also modify any of our existing products to better meet your needs. All our electrical transformers, inductors, and coils are 100% tested. Browse our range of standard coils below.

About Prem Magnetics

Transformer Manufacturer in IL

Prem Magnetics is a multi-generation family-owned coil manufacturing business based in Johnsburg, Illinois. If you’re looking for trusted transformer manufacturers in the USA, you’re in the right place. We’ve been in the coil manufacturing industry since 1972. For over 50 years, Prem Magnetics has been well known as a transformer manufacturer that puts quality first; most of our products are made in the United States, meeting the most stringent quality, safety, and compliance guidelines.
Thanks to our longevity, many of our employees have worked with us for over 20 years, and a few have spent over 40 years working with us. Our experience as a coil manufacturer is unrivaled, and our attention to detail and dedication to customer service is unparalleled. Our new 3D printing services also allow us to go the extra mile to ensure you receive the wound coils you need, efficiently and affordably. We welcome you to learn more about our history, mission, and company values.
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Coil Winding for Your Industry

Electrical transformers and inductors are used across a wide range of industries, featuring in countless day-to-day electronics and specialist equipment. Prem Magnetics is a coil manufacturer that works with customers in need of everything from prototype parts for audio equipment to medical-grade coil winding.
In engineering applications, medical equipment, radio equipment, audio production, and consumer electronics, our coils play an essential role. If you’d like to find out whether our team is a good fit for your industry, contact us today.
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Why Choose Prem Magnetics?

Made in the USA

Prem Magnetics is a transformer manufacturer in the USA. Most of our transformers, inductors, and coils are made in the United States.

Rapid Turnaround

You can trust our team to work to scope and meet your deadlines.

Local Support

Our team is based in Johnsburg, Illinois; we’re real people and we welcome you to call or contact us to discuss your project.

No Minimum Order Charges

And no non-recurring engineering charges.
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Visit Remington Industries

Remington Industries is our other business where we sell high-quality wire, predominantly made in the United States, to meet stringent UL and NEMA safety standards and comply with ASTM, RoHS, and REACH, as applicable per product line. It’s the perfect source for wire that’s made for coil winding.

We also offer wire processing services, including cutting, stripping, and terminating wire, and sell custom cable assemblies, 6061 aluminum, and 304 stainless steel.

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Coil Winding Resources

As a trusted transformer manufacturer, we’re proud to share additional industry information. Our resources page houses various documents that are available to download, including safety and environmental compliance statements, material traceability information, and information on counterfeit products prevention.
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