Copper Magnet Wire Wholesale Supplier, AWG 2-58, Large to small quantities, excellent shipping methods.
Many sizes In-Stock. Various Insulations available such as: FEP, Formvar, Nomex and Polyurethane 155 - 240deg.


Magnet wire is a copper wire covered with thin insulation. It is used in the construction of transformers, inductors, motors and electromagnets; among other applications. However, it is not magnetic itself.

The wire itself is most often fully annealed, electrolytically refined copper. Aluminum magnet wire is sometimes used for large transformers and motors. However, because of its lower electrical conductivity, an aluminum wire must have 1.6 times the cross sectional area as a copper wire to achieve comparable DC resistance. Smaller diameter magnet wire usually has a round cross section. Thicker magnet wire is often square or rectangular (with rounded corners) to permit more efficient use of available winding space. Older insulation materials consisted of cotton, paper or silk and were useful for lower temperature applications (up to 105°C). Modern magnet wire typically uses one to three layers of polymer film insulation, often of two different compositions, to provide a tough, continious insulating layer.


Magnet wire insulating films use (in order of increasing temperature range) polyurethane, polyamide, polyester, polyeseter-polyimide, polyamide-polyimide (or amide-imide), and polyimide. Polyimide insulated magnet wire is capable of operation at up to 250°C. The insulation of thicer square or rectangular magnet wire is often augmented by wrapping it with a high-temperature polyimide or fiberglass tape, and completed windings are often vacuum impregnated with an insulating varnish to improve insulation strength and long-term reliability of the winding.


Technical Information

Bare Copper Wire Resistance Weight 4/0-28 AWG

Bare Copper Wire AWG 20 - 52

Film Builds AWG 4 - 31

Film Builds AWG 32 - 60

Film Insulation Enamel Guide

International Enamelled Wire Code Guide

Manufacturer Trade Names for Magnet Wire

Film Insulation Characteristics

Thermal Classes

Bare Copper 24-58 AWG Half Sizes

Ultra Fine Magnet Wire

AWG 42-58 Inches

AWG 42-58 Metric


Flat Magnet Wire

Insulated Flat Wire 11-30 AWG Sizes

Lamination Conductors Guide

Flat Wire Insulation Chart

Flat Wire & Ribbon Wire Quotation

Inches Standard Flattening Ratios

Metric Standard Flattening Ratios


Spool Configurations


American Spool Configurations


European Spool Configurations


Southeast Asian Spool Configurations

Dimensions Magnet Wire AWG 4 - 53

Breakdown Voltage Calculations

Conductor Properties and Allowable Ampacities for Copper and Aluminum Conductors

MSDS Sheet

MSDS Essex