Leading Magnetic Coil 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.

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.

Sag Harbor Industries, Inc. $$$

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...

Classic Coil Company $$$

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...

Quality Coils, Inc. $$$

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.

Torelco LLC $$$

At Dufrane Technologies, we take pride in our extensive range of electric coils. Our comprehensive product portfolio encompasses a wide variety of coil types, including solenoid coils, electromagnet coils, induction coils, and more. Whether you require custom-made coils or standard options, we have the expertise and resources to fulfill your specifications with precision.

Dufrane Technologies, LLC $$$

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 ...

Precision Econowind, Inc. $$$

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...

Triad Magnetics $$$

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.

Johnson Electric Coil Company $$$
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A Magnetic Coil

What Is a Magnetic Coil?

These coils are one of the simplest forms of electronic components and provide inductance in an electrical circuit. 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. These coils are used in various industries, including audio, power supply, and transportation applications.

Toroidal Coil

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

Self Supported Coils

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.

Choosing the Right Magnetic Coil Company

To ensure the most productive outcome when purchasing magnetic coils from a magnetic coil supplier, it is important to compare several magnetic coil companies using our directory of magnetic coil suppliers. Each magnetic coil company has a business profile page illustrating their areas of experience and capabilities, along with a contact form to directly contact them for more information or request a quote. Review each magnetic coil company website using our proprietary website previewer to get an idea of what each magnetic coil company specializes in. Then, contact multiple magnetic coil businesses with the same form.

Magnetic Coils Informational Video


Electric Coils Power Pages

Electric Coils

Electric Coils

An electric coil, or electromagnetic coil, is an electrical conductor that contains a series of conductive wires wrapped around a ferromagnetic core that is cylindrical, toroidal, or disk-like. Electric coils are one of the simplest forms of electronic components and provide...

Inductor and Inductor Coils

Inductor and Inductor Coils

Inductors are passive two terminal components of an electric or electronic circuit that are capable of storing energy in magnetic form. They oppose sudden changes in current and they are also called coils or chokes...

Solenoid Coils

Solenoid Coils

A solenoid coil is a common electrical component that uses a wire that is tightly wrapped around a core, usually made of metal, to generate an electromagnetic field. When an electrical current is passed through the coil, the electromagnetic field that is created provides energy for linear motion...

Voice Coils

Voice Coils

A voice coil is a winding of a wire, usually copper, aluminum, or copper-clad aluminum that is wrapped around a former (often called a bobbin) and then attached to the apex of a speaker cone...

Electric Transformers

Electric Transformers

Electric transformers are static electrical machines that transform electric power from one circuit to the other without changing the frequency. An electrical transformer can increase or decrease the voltage with...

Isolation Transformers

Isolation Transformers

An isolation transformer, just like typical transformers, is a non-moving device that transmits electrical energy from one circuit to another without requiring any physical contact. It works on the idea of magnetic...

Power Cords

Power Cord

A power cord is an electrical component used for connecting appliances to an electrical utility or power supply. It is made from an insulated electrical cable with one or both ends molded with connectors. One end is typically a male connector or a plug that goes into the electrical receptacle...

Power Transformer

Power Transformer

Power transformers are electrical instruments used in transmitting electrical power from one circuit to another without changing the frequency. They operate by the principle of electromagnetic induction. They are used in transmitting electrical power between...

Three-Phase Transformers

Custom Three-Phase Transformers

An electrical transformer is a passive machine that transfers electrical energy from one circuit to another using a magnetic flux to induce an electromotive force. Transformers are used to increase (step-up) or decrease (step-down) voltages without changing the frequency of the electric current...

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