Ferrite cores are small, donut-shaped or cylindrical magnetic components made from ferrite, a type of ceramic compound comprised of iron oxide mixed with metallic eLEMents like nickel, zinc, or manganese. These cores play a crucial role in electronic devices by confining and guiding magnetic fields when electrical currents pass through the wires coiled around them. Main functions of ferrite cores include reducing electromagnetic interference (EMI), and increasing the efficiency of transformers and inductors used in power supply units, chargers, and a variety of other electronics by preventing energy loss due to stray magnetic fields.
These components are highly valued for their ability to operate at high frequencies while maintaining low power loss, making them indispensable in many modern appliances and communication devices. For instance, ferrite cores are used in the cores of transformers to step down voltage levels, and in inductors to manage the flow of currents in circuits. Major characteristics include their excellent magnetic permeability, electrical resistance, and heat dissipation properties, which contribute to the stability and longevity of the electronic devices they are used in. Some well-known manufacturers that specialize in the production of ferrite cores include TDK Corporation, Murata Manufacturing, and Fair-Rite Products Corp.