Technical Knowledge

The nature of a transformer core is a building block for the magnetic circuit, normally formed of thin, laminations of ferrous metal about which the primary and secondary windings are wound.

Discover the main types of transformer cores — from laminated silicon steel to ferrite, toroidal, and amorphous cores — and learn how to choose the right one for your application.

Cores are key components of transformers, inductors and other magnetic devices, directly determining their efficiency, size, cost and reliability. Ferrite cores and silicon steel cores are the most widely used in high-frequency power supplies, power distribution and EMI suppression. This article compares their differences in material properties, loss, pros, cons and applications to help people select cores quickly.