Electric Coils/

Molded Coils

Molded coils are electric coils that have been enclosed in a thermoformed, vacuum formed or injection molded plastic casing. Similar and sometimes synonymous to encapsulated coils, molded coils are a type of electric coil, an essential component in solenoid valves, transformers, transducers, circuits, electric motors and many electronic household appliances.

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Sag Harbor Industries, Inc.
Sag Harbor, NY
800-724-5952
Sag Harbor Industries offers their customers economic and efficient production methods. To further expand on those efficiencies, clients can utilize the company's expertise by taking advantage of their abilities to partner with them to help product the products in a most expeditious manner and in compliance with their ISO certification. For assistance with your molded coils, call today!
Johnson Electric Coil Company
Antigo, WI
800-826-9741
Johnson Electric Coil Company is known for the excellent service they provide to all customers. They are ready to watch your orders so you don't have to. The company begins with stringent training standards and then continues to use manufacturing controls to provide the best quality management. When it comes your next order of molded coils, contact Johnson Electric.
PolyTech Coil Winding
Tacoma, WA
253-324-3044
Since the company began in 1986, PolyTech Coil Winding has been providing the quality products industries need. When it comes to molded coils, they have the perfect solution to meet all of your difficult and individual needs. They are able to not only design, but fabricate the item to meet your requirements. For assistance in starting your next project today, call Polytech.
Caterina Engineering Services
Laguna Niguel, CA
951-640-9674
At Caterina Engineering Services, they deliver high quality and low cost parts from a professional network of shops, located both locally and overseas, to help your business stay competitive. They even offer engineering and design services should your project require them for completion. When it comes to molded coils, call Caterina Engineering Services for a company you can trust.
Coilcraft, Inc.
Cary, IL
800-322-2645
Coilcraft's corporate sustainability commitment compromises multiple systems and policies including quality, environmental, health and safety, social accountability, ethics and business conduct. When you need to choose a company you can truly trust and depend on, they have your answer. Call Coilcraft for all of your molded coils and other needs today to get started.

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Industry Information

Molded Coils


Molded coils, like all electric coils, are made from conductive metal wire wrapped or coiled into a specific diameter, and considered electromagnets or magnets that are only activated to magnetism when introduced to an electrical current. Electric coils provide either movement or electric current transformation through electromagnetism. An outer casing is used on electric coils that require protection from harsh environmental conditions such as moisture, salt, oil or vibration; with nothing to protect delicate copper coils from the elements, an electric coil's conductivity would be easily lost. Molded coils and encapsulated coils solve this problem in overlapping ways: molded coils are enclosed in injection molded or thermoplastic coverings that seal the entire coil unit, while encapsulated coils more often use liquid or thermoformed polymer epoxies. While these two overlapping types are often the same, molded coils more often refer to coils that are encased in hollow, thermoformed or injection molded plastic casings; encapsulated coils are often molded into liquid or thermoformed epoxies, the coil becoming one with its casing. Molded coils generally have hard, hollow casings, which are good at protecting coils from harmful weather.

The design of molded coils offers superior weather resistance; many molded coils are entirely waterproof, allowing for a much broader diversity of applications. While some types of molded coils can be cost-effective alternatives to larger, more complicated structures, the tooling costs of manufacturing plastic parts that encapsulate molded coils are often more expensive than impregnated coils, which have wire directly epoxy or laminate-dipped and therefore require little or no tooling. Manufacturers choose molded coils, encapsulated coils or custom coils that best fit the application and manufacturing process at hand. Some such applications and industries that utilize this basic function of transmitting heat, sound or electricity include: Mp3 players and cameras in the electronic arena, engines and ignition systems in the automotive industry, x-ray and ventilation machines in the medical field, tractors and fertilizers among agricultural equipment and numerous material handling equipment in industrial manufacturing.