Soft Ferrite Magnets

Soft Ferrite Magnets, Soft Ferrites, Soft Ferrite Core, Nickel- Zinc ferrites, MnZn ferrite, microwave ferrites

HSMAG manufactures soft ferrite cores (Soft Ferrite Magnets) in both MnZn and NiZn to most of the IEC standard shapes and sizes. Material permeabilities range from 15 to 15000 in grades specialized for RF, signal, power and suppression applications. Custom shapes and sizes are available upon requests.

Soft Ferrite Magnets Cores

Soft Ferrite Magnets Cores

Types of Materials and Available Shapes of Cores

Soft Ferrite. Soft ferrites are derived from iron oxide obtained from the cleaning of steel (pickle liquor) or mined from the earth. Metals such as nickel, manganese and zinc are added to the iron oxide.

Ferrite material is then pressed and fired to form a crystalline structure that gives ferrite cores their soft magnetic properties. Subsequent grinding or coating operations may take place before the core is used. Manganese-Zinc soft ferrites have high permeability and low eddy current losses; Nickel- Zinc ferrites have lower permeabilities with very low eddy current losses.
A variety of materials spans the frequency range from 10 KHz to 1 GHz and up. Soft ferrites have low saturation flux densities, in the range of 2500 to 4000 gauss, but are available in shapes that can be readily gapped to handle more MMF at the sacrifice of permeability. Because of their very low core loss at high frequency, ferrites are used extensively in switchmode power supplies as power transformers, filter inductors, current transformers, and mag amps. Ferrites are available in a wide variety of shapes and sizes with volumes up to about 500 cm. Some other common applications for ferrites are rod antennas, common mode filters, RF trans- formers, and pure inductors.

Ferrites were plagued for many years by their extremely wide physical and magnetic tolerances. Additionally, ferrites are hindered by rather large temperature dependence. Extensive research and development has improved, but not eliminated, all of the soft ferrite shortcomings. Because of their widespread manufacture, low cost, and readily available technical information, soft ferrites are the most widely used magnetic material at High- Frequency.

At high frequency metallic soft magnetic materials simply cannot be used due to the eddy current losses. Therefore, soft ferrites, which are ceramic insulators, become the most desirable material. These materials are ferrimagnetic with a cubic crystal structure and the general composition MO.Fe2O3, where M is a transition metal such as nickel, manganese or zinc.

MnZn ferrite, sold commercially as ferroxcube, can be used at frequencies up to 10MHz, for example in telephone signal transmitters and receivers and in switch mode power supplies (also referred to as DC-DC converters). For these type of application the driving force to increase frequency is to allow miniaturisation.

Additionally, part of the family of soft ferrites, are the microwave ferrites, e.g. yttrium iron garnet. These ferrites are used in the frequency range from 100MHz to 500GHz, for waveguides for electromagnetic radiation and in microwave devices such as phase shifters.

CDR Type SMD Inductor Ferrite Core

CDR Type SMD Inductor Ferrite Core

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8D Type SMD Industrial Ferrite Core

8D Type SMD Industrial Ferrite Core

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104R Type SMD Soft Ferrite Core

104R Type SMD Soft Ferrite Core

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3D6D Type Ferrite Magnet Core

3D/6D Type Ferrite Magnet Core

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I Type F8N NiZn Ferrite Core

I Type F8N NiZn Ferrite Core

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P Type SMD SMT Ferrite Core

P Type SMD SMT Ferrite Core

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SDRI74 Type Chip Inductor Ferrite Core

SDRI74 Type Chip Inductor Ferrite Core

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SDRI127 Type SMD Inductor Ferrite Core

SDRI127 Type SMD Inductor Ferrite Core

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SP Type SMD Small Ferrite Core

SP Type SMD Small Ferrite Core

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SCFS Type EMI Suppression Ferrite Core

SCFS Type EMI Suppression Ferrite Core

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RHS Type EMI Soft Magnetic Ferrite Core

RHS Type EMI Soft Magnetic Ferrite Core

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FS Type EMI Split Cable Clamp Ferrite Core

FS Type EMI Split Cable Clamp Ferrite Core

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RnH Type Cylinder Soft Ferrite Cores

RnH Type Cylinder Soft Ferrite Cores

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CF Type Flat Ferrite Core

CF Type Flat Ferrite Core

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DRnW Type EMI Ferrite Drum Core

DRnW Type EMI Ferrite Drum Core

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SCH Type EMI Split Cable Ferrite Core

SCH Type EMI Split Cable Ferrite Core

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SCNF Type EMI Cable Ferrite Split Core

SCNF Type EMI Cable Ferrite Split Core

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SCRC Type Cable Ferrite Clamp Core

SCRC Type Cable Ferrite Clamp Core

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BB Type Magnetic Ferrite Bead Core

BB Type Magnetic Ferrite Bead Core

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SH Type EMI Suppression Soft Ferrite Core

SH Type EMI Suppression Soft Ferrite Core

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