What is a Drum Core Inductor?
Drum core inductor is a type of power inductor in which the round magnet wire is wounded directly onto the ferrite core. The ferrite core is usually drum or spool shaped. It stores magnetic energy when a current flows through it and is available in both shielded and unshielded constructions.

The shielded drum core inductor consists of a magnetic shielding that covers the drum core inductor structure. The magnetic shielding is made up of ferrite magnetic material. The shielded construction has a closed magnetic path, thus offering benefits such as preventing magnetic leakage (enhance magnetic performance), minimizing electromagnetic interference (EMI), and minimizing audible core noise.
But shielded construction delivers a lower saturation current when compared to the unshielded drum core inductor.
In the unshielded drum core inductor, the coil does not have magnetic shielding. This type of construction offers benefits such as high saturation current (suitable for large current working) and high energy storage level.
But unshielded construction offers high EMI (due to magnetic leakage) when compared to the shielded drum core inductor
Drum core inductors are ideal for use in LED drivers, DC/DC converters, transformers, power supplies camcorders, LCD TVs, noise filters, modems, smart meters, POL converters, battery-powered devices, and distributed power systems.
Drum Core Inductors from the leading manufacturers are listed on everything PE. Our parametric search tool will scan multiple manufacturer websites to identify Drum Core Inductors that meet your requirement. You can then download datasheets, request quotations via everything PE. Your inquiry will be routed to the manufacturer or their representative who will give you more information on the product.