The ZCAT20D Ferrite Clamp On Core from TDK is a high-temperature EMI suppression core that has an operating temperature range of -40 degrees Celsius to +85 degrees Celsius and size of 35mm x 30mm x 20mm. It is suitable for EMI suppression in a wide range of frequencies, with a impedance range of 60 O from 10MHz to 100MHz. This core is made from a high permeability ferrite material which is ideal for providing EMI suppression in high temperature environments.