The E25/13/7-3C90 is an E-Type ferrite core produced by Ferroxcube. It is designed for use in switch-mode power supplies and converters, such as those found in power supply units, LED drivers, inverters, and other high frequency applications. The core has an air gap and provides high permeability, low core losses, and excellent stability. It is the European declaration of conformity product, so it meets all of the relevant safety, health, and environmental protection requirements.