Aramid, also known as aromatic polyamide, is formed by the polymerization of m-benzoyl chloride and m-phenylenediamine. Aramid paper is made of meta-aramid fiber and fabric. It has good flame retardancy and temperature resistance performance, it can be used for more than 20 years at 220 °C. Aramid paper has inherent dielectric strength. The dielectric constant value of the product is close to air 1.0, which makes theelectric field distribution between aramid paper and cooling medium more uniform. Aramid paper serves as an advantageous replacement for Nomex paper due to its superior mechanical and thermal properties and competitive pricing with exceptional strength, heat resistance, and durability, Aramid Paper outperforms in challenging environments, providing enhanced reliability and longevity compared to Nomex Paper.