Please visit the Technical Documents library for the Ferrite Core Catalog. Other reference materials including technical bulletins, application notes and white papers are also available for download.
What is the difference between nylon and epoxy coatings for ferrite toroids?
They are similar. Nylon is thicker, and can stand temperatures up to 155ºC. Epoxy is rated at 200ºC. Nylon finishes are generally applied to cores ranging in O.D. (outside diameter) from 12.7 mm to 29 mm. Very large and very small cores are coated with a epoxy finish. The voltage breakdown guarantee of nylon and epoxy coating is 1000 volts wire to wire. Nylon cushions better and is more resistant to solvents. Both finishes are held to the same electrical specifications.
What is Magnetics'® specification for out of roundness on a ferrite toroid?
Out of roundness is controlled by mandating that cores meet overall dimensional tolerances for O.D. and I.D. while keeping enough cross section to meet the specified AL. Refer to the Ferrite Design Manual for toroid physical dimension tolerances.