Magnetic wire, commonly known as magnet wire or enameled wire, is a type of copper or aluminum wire coated with a very thin layer of insulation. Its main function lies in its use in the construction of transformers, inductors, motors, speakers, hard disk head actuators, electromagnets, and other applications that require tight coils of insulated wire. The insulation enables the wire to be wound into coils without short-circuiting. The wire is crafted to maintain its integrity and electrical properties under dynamic stress such as winding and unwinding, as well as thermal variations. This results in a highly efficient product that is vital for the performance of electrical components.
One of the key characteristics of magnetic wire is its thermal endurance, which ensures performance over a wide temperature range. Furthermore, this wire is valued for its varnish-coating which not only insulates but also protects against corrosion and enhances the lifespan of the components it is incorporated into. The versatility of magnetic wire is seen through its myriad uses in electronics, automotive, and industrial power applications, underpinning its importance in modern technology. Several established manufacturers of magnetic wire include Superior Essex, Rea Magnet Wire Company, Inc., and Elektrisola.