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Iron powder has been used as a core material in RF circuits for many years. It is typically used to produce high "Q" inductors from 50KHz to 500MHz and broadband transformers above 50MHz. It is the preferred core material due to it's stability, high "Q", frequency response and power handling capabilities.
The distributed air gap properties inherent in iron powder cores make them extremely well-suited for a variety of energy storage inductor applications. Iron powder is a cost-effective design alternative to alloy powder core materials. It can also can be used in place of ferrite and iron-alloy laminations requiring a gap.
200C Series™ of Materials are specifically designed for severe environment applications where cores are exposed to or generate elevated temperatures. These cost-competitive cores materials are not subject to thermal aging for operating temperatures up to +200°C.