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Magnetic Coils

A reliable source for Magnetic Coils information and leading Magnetic Coils Companies & Manufacturers.

A magnetic coil is an electrical conductor containing a series of conductive wires wrapped around a cylindrical, toroidal, or disk-shaped ferromagnetic core. Read More…

Magnetic Coils Magnetic coils, which can also be referred to as electromagnetic coils or simply just coils, include all types of electrical coils that operate based on the principle of induction.
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Leading Manufacturers

Sag Harbor, NY  |  800-724-5952

We are proud of the craftsmanship of our engineers. All of our products are made right here in the United States and we promise that these items are created from high quality resources. Our electrical coils are unique and efficient.

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Sag Harbor Industries, Inc. $$$

Bristol, CT  |  800-825-4319

Established in 1973, Classic Coil Company is a Contract Manufacturer of electronic coils. We manufacture coils for a variety of industries; winding wire gauges from 4-58 AWG. We are ISO 9001-2015 certified, ITAR registered and DFARS Compliant. Our Engineering services allow us to assist with design, reduce cost, and increase efficiency in production. Call or visit our website to learn more about our capabilities.

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Classic Coil Company $$$

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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Quality Coils, Inc. $$$

Alpha, NJ  |  800-867-3526

Since 1962, Torelco has been a supplier of electric coils and transformers of superior quality. We offer custom coils, solenoid coils, ferrite core coils & toroid wound coils to serve a range of industries. Markets served include medical, military, electronics, and industrial. When you work with us, our promise is to build to the exact specifications and meet the custom needs of our customers.

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Torelco LLC $$$

North Fort Myers, FL  |  239-997-3860

Check out what’s new online at Precision Econowind, manufacturer of the highest quality custom coils at reasonable prices, with on time delivery. Serving the coil industry for over 30 years, we’re experienced with producing loudspeaker & medical industry coils, coils wound on customers’ bobbins/tooling; freestanding, flat wire, edge wound, square, rectangle & shaped coils. Submit your specs today!

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Precision Econowind, Inc. $$$

Perris, CA  |  951-277-0757

Triad Magnetics has been in the electric coils industry for over 75 years. Giving us the knowledge and expertise to be one of the best in the industry. We have a wide range of electric coils and inductors as well as the ability to custom engineer and manufacture electric coils to our customer’s needs. Having served the needs of many industries for more than half a century, Triad believes its experience makes the difference.

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Triad Magnetics $$$

Antigo, WI  |  800-826-9741

Johnson Electric Coil Company is a family owned manufacturer that specializes in custom transformers, coils and inductors. From three phase isolation transformers to single phase inductors and chokes, we carefully design our products to meet your exact specifications.

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Johnson Electric Coil Company $$$
placeholder image Sag Harbor Industries, Inc. Classic Coil Company Quality Coils, Inc. Torelco LLC Precision Econowind, Inc. Triad Magnetics Johnson Electric Coil Company

What Is a Magnetic Coil?

A magnetic coil is an electrical conductor containing a series of conductive wires wrapped around a cylindrical, toroidal, or disk-shaped ferromagnetic core.

These coils are one of the simplest forms of electronic components and provide inductance in an electrical circuit.

A Magnetic Coil

An electric current is passed through the coil wire to generate a magnetic field or external magnetic field through the interior of the coil, which will be used to generate an electromotive force in the conductor.

A magnetic coil is made up of a core and windings, and these have a primary winding and a secondary winding.

How a Magnetic Coils Function

The major purpose of the coil is to create a magnetic field that becomes stronger with an increase in the number of turns. The magnetic field strength is proportional to the amount of current flowing through the field.

With the act of adding more current, the force of the magnetic field will result in an increment. All wires can produce a magnetic field when current passes through them. Using the technique of winding and looping the wires, one can increase the power of the produced magnetic field and store the energy.

When electricity passes through a circuit, it flows through a resistor and into a magnetic coil. The magnetic coil maintains proper stability and initially resists the current flow. However, as the current rises, the magnetic coil later allows the current to pass through.

When the current is removed, the electric coil acts to maintain the flow and resists the change, thus allowing the electricity to continue to flow even when the current has been removed.

The number of coils determines the inductance of the coil, as more coils result in a higher inductance rating. The core also affects the inductance as some have an iron core or a ferromagnetic core.

The cross-sectional is also proportional to the inductance, and the length of the coil affects the inductance as the shorter the coil equals greater inductance.

Types of Magnetic Coils

The magnetic coils vary by how they will be used. Despite the different types of magnetic coils, they all have electric current that interacts with a magnetic field.

Bobbin Wound Coils

These contain an electromagnetic wire wound around a core made up of plastic or a bobbin.

These types of cores come in various sizes. In addition, bobbin wound coils can be molded, taped, or impregnated in a manner that enables them to be used for various medical devices, automotive applications, relay, and sensing.

Bobbin Wound Coils

Toroidal Coils

This type of coil is used for inductors and transformers. They contain a coil formed by wrapping a wire around a circular core that is open in its center.

This contained shape of the toroidal coil enables it to have a magnetic containment of the field, thus limiting the amount of leakage of the field outside the coil.

Toroidal Coil

These coils are used in various industries, including audio, power supply, and transportation applications.

Self Supported Coils

Self-supported coils are used when there is limited space and no room for a bobbin or core. Therefore, these coils can be placed closer to the metal in the circuit and have greater magnetic capabilities.

Self Supported Coils

Some of their application areas include magnetic locks, audio circuits and for clutches.

Applications and Uses

Magnetic coils are used in the automotive sector, including ignition systems of internal combustion engines for vehicles such as sports cars. Imaging equipment powered by high voltage coils, such as x-rays, uses magnetic coils. Radio transmitters and flashing lights contained in cameras and strobe lights use magnetic coils for proper functionality. Finally, electrical transformers and vacuum tubes also use magnetic coils.

Magnetic Coils Informational Video


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