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SIFERRIT materials

Cautions and warnings

General

Based on IEC 60401-3, the data specified here are typical data for the material in question, which

have been determined principally on the basis of toroids (ring cores).

The purpose of such characteristic material data is to provide the user with improved means for

comparing different materials.

There is no direct relationship between characteristic material data and the data measured using

other core shapes and/or core sizes made of the same material. In the absence of further agree-

ments with the manufacturer, only those specifications given for the core shape and/or core size in

question are binding.

Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent

that the initial permeability is dependent on the stress state of the core. The higher the stresses are

in the core, the lower is the value for the initial permeability. Thus the embedding medium should

have the greatest possible elasticity.

For detailed information see Data Book 2007, chapter “General – Definitions, 8.2”.

Heating up

Ferrites can run hot during operation at higher flux densities and higher frequencies.