Enameled copper wire, also known as magnet wire, is a fundamental electrical conductor that combines the excellent conductivity of copper with a thin, durable insulating coating. Its key characteristics make it indispensable across a wide range of industries and applications.

The primary features of enameled copper wire are its thermal class and breakdown voltage. The thermal class, such as Class 130 (B), 155 (F), 180 (H), 200（C）or even higher like 220℃，240℃, indicates the maximum temperature at which the wire can continuously operate without significant degradation of its insulating properties. This high-temperature resistance ensures reliability in demanding environments where heat is generated, such as within motor windings.

Simultaneously, the breakdown voltage (or dielectric strength) is a critical measure of the insulation’s ability to withstand electrical stress without failing. It represents the voltage level at which the insulating enamel layer is breached. High-quality enameled wire can withstand breakdown voltages of several kilovolts, preventing short circuits between adjacent turns in a tightly wound coil.