Hi guys, this is JRPanel ! In previous blog s, we have introduced several points about High Frequency Transformer, like bobbins and Flat Spiral Coil . In this blog, JRPanel would like to introduce the commonly used magnetic cores in transformers , based on materials. Generally speaking, the material of the core determines the environment in which the transformer is used. A transformer that uses a core of a different material will have its performance affected, may even be non-functional. By material, magnetic cores are generally divided into the several categories . JRPanel will introduce them one by one to help you understand more fully. 1. Manganese Zinc Ferrite Core Mn-Zn core is a soft magnetic core with high initial permeability (2000~15000). The higher the initial permeability, the lower the surface resistance, so it is generally used in circuits below 1 MHz. Mn-Zn core has a high saturation flux density and causes lower losses, making it one of the most desirable