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Toroidal Coil Manufacturers and Suppliers

IQS Directory implements a thorough list of toroidal coil manufacturers and suppliers. Utilize our listing to examine and sort top toroidal coil manufacturers with previews of ads and detailed descriptions of each product. Any toroidal coil company can design, engineer, and manufactures toroidal coil to meet your companies specific qualifications. An easy connection to reach toroidal coil companies through our fast request for quote form is provided on our website. The company information includes website links, company profile, locations, phone, product videos and product information. Customer reviews are available and product specific news articles. This source is right for you whether it's for a manufacturer of toroidal coil with gaps, ferrite toroid coil cores, and conducting metal wire.

  • Sag Harbor, NY 800-724-5952

    All of our toroidal coils require low maintenance. Our company is an industry leader for coil equipment and we create solutions including: encapsulated coils, molded coils, solenoid coils, field coils, self-supported coils, varnished coils and more. We can create custom coil products based on your need. Our company is privileged to serve customers who place their coil needs at a high priority. Give us a call today to learn more information!

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  • Antigo, WI 800-826-9741

    When it comes to your order of toroidal coils, Johnson Electric Coil Company is willing to assist in any way that they can. They will expedite urgent requirements, assist in finding the best freight carriers at the best prices and give proactive updates on your orders. For all orders, you can depend on Johnson Electric using lean manufacturing principles and quality management systems.

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  • Bristol, CT 860-584-0927

    We are an ISO 9001:2015 certified company which is internationally known for manufacturing high quality electromagnetic-coils. It is our goal to provide quality products, a commitment to speedy delivery, and competitive pricing. We understand that every application is unique, so we encourage you to contact us to discuss your specific requirements. Call us at 1-860-584-0927 and find out what our 50+ years of experience can do for you.

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  • Ormond Beach, FL 386-671-7406

    Where others have failed, Standard Technology overcomes the most difficult design challenges for custom electric coils, solenoids, sensors and electromagnets. With years of experience, full engineering consulting services and in-house machine capabilities, we meet clients’ exact needs, from AC/DC coils to coil assemblies. We have produced encapsulated and over-molded coils for many industries.

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  • Binghamton, NY 800-224-4477

    Endicott Coil Company is an expert manufacturer of an impressive range of coils. Created in wire gages of 4 AWG – 50 AWG with insulation capacities up to 220 degrees, our coil assortment consists of molded coils, custom coils, self-supported coils, encapsulated coils, inductors & ferrite core coils. As a leading electric coil manufacturer, ECC’s products are used in a wide range of applications.

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  • Yardville, NJ 609-585-6600

    We are a dedicated manufacturer of electric coils and you will not be upset with the capabilities of our teams. All of our high performance devices are competitively priced and we can design any coil to match your unique requirements. We are a focused supplier for OEM, military, precipitator and air pollution control industries. Please give one of our representatives a call today to learn more information!

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businessIndustry Information

Toroidal Coils

Toroidal coils are electrical components that consist of a doughnut-shaped metallic core that has a conducting metal wire looped or coiled around it in order to form an inductor. An inductor stores electrical energy through the production of a magnetic field and introduces that stored energy flow into the metallic core. The most common material used to form conductive metal wire is copper, while the metallic core is typically manufactured using materials such as solid iron, solid steel or powdered iron due to their ferromagnetic capabilities.

Toroidal coils offer both a higher inductance and a higher "Q" factor, which refers to the measurement of the efficiency of the coil's inductive reactance to its resistance at a set frequency, than solenoid coils. Able to be used for a wide range of applications, toroidal coils are necessary components in many industries just as its fellow coils, induction, choke and magnetic are: power generation, for use in power transformers, current transformers and more; electronics, for use in energy meters for testing of radio equipment and more; and industrial manufacturing, for use in instrument transformers, high-frequency coils and switched-mode power supply (SMPS) transformers for power supply control. Although many types of electrical coils are used in these and other industries, their uses vary depending on the coil itself. Just one example of the variance is how the choke coil serves to protect power lines while the toroidal works in the actual transformers. This group of tools is very versatile.


Toroidal coils are easily distinguished from the various other types of electric coils because of their unique design. Instead of having a cylindrical core, toroidal coils have a doughnut-shaped core that the wire is wrapped around in very small coils. With a smaller number of turns required, the toroidal coil is able to provide a closed magnetic path. This means that the magnetic flux of the coil is primarily confined to the coil's core, thus preventing the energy provided from being absorbed by any objects in close proximity to the coil. As a result, toroidal coils are pretty much able to serve as a self-shield and do not require external shielding unlike many other types of electric coils. The magnetic flux of the toroidal coils occurs as a result of an alternating current flowing through the coil. An alternating current varies from a direct current in that the current flow will periodically change direction, whereas a direct current maintains one singular direction of current flow. In addition, the magnetic flux of the coil changes in proportion to changes in the current. Toroidal coils can be manufactured with or without a base, and when manufactured with a base may be mounted either horizontally or vertically.


Toroidal Coils
Toroidal Coils - Sag Harbor Industries, Inc.



Toroidal Coils Informational Video