Ferrite Core Type Transformers – Definite Guide
                     Ferrite Core 
Transformers
The definite guide for 
Ferrite core Transformers
Overview
A power transformer has primary, secondary, and sometimes tertiary windings. The flux 
linkage between these windings powers the transformer. In the transformer, one low 
reluctance magnetic path is provided for effective flux linkage. This path is well-known in 
the core. The core is typically made of various materials such as silicone steel, ferrites, 
and so on.
Different Types of Ferrite Core Type Transformers
Manganese Zinc Ferrite (MnZn): (MnaZn(1-a)Fe2O4) is the chemical formula. These cores 
have higher saturation levels and permeability than NiZn. MnZn cores are ideal for 
applications with a frequency of operation less than 5MHz. These cores' impedance 
makes them ideal for inductors with frequencies up to 70 MHz. 
Nickel Zinc Ferrite (NiZn): NiaZn(1-a)Fe2O4 is the chemical formula. These cores have a 
higher resistivity than MnZn and are used in applications with frequencies ranging from 
2MHz to hundreds of MHz. NiZn is thought to be ideal for inductors operating at 
frequencies greater than 70 MHz. These cores have a low Curie temperature and are 
temperature sensitive (under 500oC).
At a certain Curie temperature, ferrite materials lose their magnetic properties. As a 
result, this fact should be considered when choosing ferrite cores for your transformer.
Ferrite cores Shapes
E, I Cores: These cores feature simple bobbin winding and are simple to assemble. Power, 
differential, and telecom inductors, as well as broadband, converter, and inverter 
transformers, use E,I cores.
ETD Cores: These cores have a centre post with low winding resistance. These ETD cores' 
dimensions can be optimised for power transformer efficiencies. These cores are perfect 
for power transformers and inductors.
EFD Cores:The cross-sectional areas of the EFD cores make them ideal for compact 
transformers, as well as various inductor and transformer applications.
EER Cores: The cores have a round centre post, which allows for a shorter winding path 
length than a square centre post.

If you wish to source your ferrite core transformers from a reliable source, you can always 
consider Alisha Coils & Transformers. The company provides ferrite cores in various 
specifications to meet your application requirements.