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Importance of Ferrite Cores in Electrical Devices

Electrical devices play a huge role in making our day-to-day lives easy. From mobile phones and their chargers to electric transformers, each device plays its part to help us live in convenience. However, due to the current limitations of technology, we haven’t perfected these devices. 

Electrical devices run electricity through their in-built circuits to perform their designated actions. In theory, a perfect electrical device can run for years at stretch with no loss in efficiency or quality. Current-day devices face losses during conversion and are susceptible to electromagnetic interference. Ferrite cores are introduced in devices to limit these issues.

Ferrite Cores

These are magnetic cores made from ferrites, a ceramic, ferrimagnetic and non-conduction compound. Having low coercivity and high resistivity, ferrites enable these cores to exhibit high magnetic permeability and low electric conductivity. These properties are essential in transformers, inductors and other electrical devices. 

These magnetically soft ferrites are pressed & extruded into ferrite cores of different shapes and sizes, allowing easy integration with a wide range of electrical devices. 

But what roles do ferrite cores fulfil in such devices?

Prevention of Eddy Currents

The constant flow of electricity in the electrical devices induces magnetic fields of varying intensities. These fields in turn induce eddy currents, a localised electric current that leads to losses in form of electrical and heat energy.

Eddy currents are undesirable in electrical devices and ferrite cores help in reducing their negative effect. Ferrites have high permeability and low electrical conductivity. These properties deny eddy current buildup, letting devices perform at optimum efficiency.

Low Hysteresis Loss

The current running through electrical devices can be termed a magnetisation force. When this force increases, so does the magnetic flux. However, at the time of decrease, the flux doesn’t diminish as quickly as the force. This difference is countered by applying force in the opposite direction. The loss encountered due to this magnetisation & demagnetisation of the core is termed hysteresis loss.

Ferrites’ ability to change magnetic direction leads to minimal hysteresis loss. 

Protection Against Electromagnetic Interference (EMI)

The interaction between electricity and the resulting magnetism gives rise to unwanted frequencies or noise. This noise natural or man-made can cause disturbance in the electrical path, causing electronics to malfunction temporarily or even permanently. 

Protecting against this invisible force is crucial for the smooth functioning of electrical devices. There are many options to reduce EMI but one of the best is using ferrites in some shape or form. Ferrite cores keep these disturbances at bay by acting as a barrier between noise and the application.


Electrical devices come in a wide range of sizes & form factors. Because of this, it would be tough to incorporate a universal-sized component.

Ferrite cores are available in many shapes & sizes, some carrying a different set of features than others. Some examples are E cores, POT Cores, U Cores, Toroidal Cores, etc. With a little guidance from our experts, you can find the core that perfectly suits your application.


We are a leading manufacturer & exporter of soft ferrites. Our products boast accreditation of ISO 9001:2015, IATF  16949 & ISO 14001:2015 and are tested following IEC 410/IEC 414 sampling plan to ensure an acceptable Average Quality Level (AQL) for major and minor defects. 

Contact us to improve your electrical devices by introducing them to the perfect ferrite pairing.