The flux path is completely closed so the capabilities of the ferrite are fully exploited. A further advantage is the very low leakage filed, which makes it a suitable shape for power and pulse transformers. They are mainly used for pulse- and wide band transformers and interference suppression coils but also in special power supplies.

Steward's ferrite toroids provide high performance when wound and used as cores for transformers, inductors, or chokes. A variety of materials and core sizes allow performance to be optimised for application size and frequency. Steward offers:

Materials that provide the high inductance and low losses desired for high frequency transformers

Materials that provide high impedance for low frequency EMI suppression

Materials that provide high impedance for high frequency EMI suppression

Applications

LAN matching and isolation transformers

LAN common mode chokes

Power supply common mode chokes

Inductors

Current sensing transformers

DC-DC converters

Telecommunication transformers

Telecommunication chokes.

Ferroxcube has developed a range of gapped toroids, both in power material 3C94, for power applications and in special high permeability, stable µ(T) material 3E55 with low THD for telecom applications. They are parylene coated and the gap is sealed with special glue, which is temperature resistance up to 250°, thus avoiding product deterioration, even under extreme operating temperatures.