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Ferrite Core Size Table- How to find the Right Size?

Ferrite Core Size Table


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Ferrite core size table can help to choose the right size of ferrite cores for your engineering purposes. But before coming up to this, let's see what is there to know about ferrite cores.

Ferrite cores are ceramic materials that can be produced in a variety of shapes and sizes to meet your engineering requirements. To produce these ferrites, alloys are selected and mixed depending on the required permeability of the cores. Then the combination is molded to produce ferrites in their desired shapes and sizes with a pressure of 15- 200 tons per square inch. Ferrites are very effective in preventing unwanted noise signals that are between 2 MHz to 250 MHz range. They are also ideal for use in transformers, inductors, house appliances, etc, so their use is growing rapidly. But how do you find the right size of ferrite cores for your needs? Checking the Ferrite core size table is the answer. 

In this blog, we are going to share some important information about ferrite cores and how you can use the Ferrite Core Size Table to find the ideal cores for your needs. 

What are Ferrite Cores?

Ferrite Cores are MnZn based magnetic materials that are used in a range of electronic devices. They are hard and brittle in nature. The cores are available in dark grey and black colors. They are used in equipment to suppress unwanted high frequency noise levels. For this, ferrites concentrate the magnetic field, increase inductance and reactance and therefore, filter out the noise. With twin benefits of high magnetic permeability and high electrical resistivity, they are generally preferred over other materials. 

First, the ferrite concentrates the magnetic field, increasing inductance and therefore reactance, which impedes or 'filters out' the noise.

How Ferrite Cores are formed?

Ferrite cores go through several processes to be formed into a particular shape and size. Generally, they are formed using a combination of Manganese and Zinc (MnZn) ferrites. These compounds have high magnetic properties which are below the Curie Temperature. The cores can be magnetized easily as they have a higher intrinsic resistivity. You can use these cores up to high frequencies without lamination which is normally required for magnetic metals. After producing these ferrite components, they are collapsed to remove burrs and sharp edges so that they remain safe to use. 

What is a Ferrite Core Size Table?

As a leading manufacturer of ferrite components, Cosmo Ferrites has developed diverse types and sizes of ferrite cores to serve the growing demands and needs of the electronics industry. Here we are presenting our most popular ferrite cores ideal for various applications such as transformers, inductors, telecommunications, SMPS, etc. You can use the below Ferrite Core Size Table to find the right choice of ferrites for your business requirements. 





E Cores Power, Telecom and Differential Inductor, Power Transformer, Broadband Transformer Low Losses, High Saturation EE1011, EE11036, EE12820, EE1306
ER Cores

Differential Inductor, Power Transformer, Compact Transformers, Switch Mode Power Supplies

Minimum Winding Resistance, Optimum Efficiency EER2811, EER2811A, EER2811B, EER3511
PQ Cores SMPS, Power Inductor

Low Losses, High Saturation, Good Stability

PQ2020, PQ2609, PQ2610, PQ2616
PM Cores Differential Inductors, Telecom Inductors, Power Transformers

Self-Shielding, Thermal Stability 

PM6249, PM8770
Toroidal Cores EMI/ EMC Filter Choke, Current Transformers

Good Loss Factor, High Stability, High Saturation 

T0904, T1003, T1004, T1005
U Cores

Power Transformers

Low Losses, Good Frequency Response, Low Exciting Currents

UU1928, UU2036, UU2840, UU3544
I Cores

Power Transformers

Low Losses, High Saturation, Good Frequency Response

I12620, I2020, I2830, I3016
ER Cores

Differential Inductors, Power Transformers

Minimum Winding Resistance, Optimum Efficiency

EER2811, EER2811A, EER2811B, EER3511
EP Cores

Differential Inductors, Telecom Inductors, Power Transformers

Low Losses at high flux densities & temperatures, High Saturation 

EP7, EP10, EP13, EP15
RM Cores

Differential Inductors, Filter Inductors, Power Inductors, Broadband Transformers

Low Losses, Good Frequency Response, High Stability RM10, RM12, RM6, RM8.


Ferrite cores are an effective and inexpensive way to reduce high-frequency noise and switch transients. While using ferrite cores for your electrical requirements, you must choose the right type and size to produce the highest value equipment for your customers. You can get the idea of this by considering the Ferrite Core Size Table given above. 

If you need more information, you can contact us at Cosmo Ferrites. Through a combination of exceptional quality, service, price, and delivery, we help you excel in your industry and produce modernized and highly-efficient equipment. Contact us to get a quote for your business requirements.