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.

If you need assistance with your design, please contact Butler Winding and ask for Engineering.