Air Core Coil Information & Theory


Application Notes > Air Core Coil Information & Theory

Air Core Coil Description

The term “air core coil” describes an inductor that does not use a magnetic core made of a ferromagnetic material. The coils are wound on plastic, ceramic, or other nonmagnetic forms, as well as those that actually have air inside the windings.

Air Core Coil Characteristics

      • lower inductance than ferromagnetic core coils
      • are often used at high frequencies because they are free from energy losses called
      • core losses that occur in ferromagnetic cores, which increase with frequency.

Air Core Side Effect

Inductance of the coil may change due to mechanical vibrations because the coil is not rigidly supported by a coil form.