0199000019 Fair-Rite, 0199000019 Datasheet - Page 2

• Manufacturer Part Number: 0199000019
• Description: BEAD KIT, EMI SUPPRESSION
• Manufacturer: Fair-Rite

Specifications of 0199000019

• Kit Contents: Contains 28 Different Beads In Three Suppression Materials, 73, 43 And 61.
• Component Type: Shield Bead Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

History
The history of magnetism began with the discovery of the properties
of a mineral called magnetite (Fe
were found in the district of Magnesia in Asia Minor (hence the
mineral’s name) where it was observed, centuries before the birth
of Christ, that these naturally occurring stones would attract iron.
Later on it found application in the lodestone of early navigators.
In 1600 William Gilbert published De Magnete, the first scientific
study on magnetism.In 1819 Hans Christian Oersted observed that
an electric current in a wire affected a magnetic compass needle,
thus with later contributions by Faraday, Maxwell, Hertz and others,
the new science of electromagnetism came into being.
Even though the existence of naturally occurring magnetite, a weak
type of hard ferrite, had been known since antiquity, producing an
analogous soft magnetic material in the laboratory proved elusive.
Research on magnetic oxides was going on concurrently during
the 1930’s, primarily in Japan and the Netherlands. However, it
was not until 1945 that J. L. Snoek of the Philips’ Research Labor-
atories in the Netherlands succeeded in producing a soft ferrite
material for commercial applications.
Fair-Rite Products Corp. was not far behind in the manufacture
and sale of soft ferrites for use in the electronics industry. It was
formed in 1952 and officially started operations in 1953.The ensu-
ing years have seen a rather crude product, which was available
in only a few shapes and materials, develop into a major line of
ferrite components for inductive devices, produced in many core
configurations with a wide selection of materials. The application
of ferrites in EMI suppression as shield beads and broadband
chokes, where an effective resistive impedance is produced at
high frequencies, has grown so fast in the last decade, that their
use as EMI suppressors is limited only by the imagination of the
end user.
Soft Ferrites
The single most important characteristic of soft ferrites, as com-
pared to other magnetic materials, is the high volume resistivity
exhibited in the monolithic form. Since eddy current losses are
inversely proportional to resistivity and these losses increase with
the square of the frequency, high resistivity becomes an essential
factor in magnetic materials intended for high frequency operation.
The magnetic properties of ferrite components are isotropic, and
by employing various pressing, injection molding, and/or grind-
ing techniques, a wide range of complex shapes can be formed.
There is no other class of magnetic material that can match soft
ferrites in performance, cost and volumetric efficiency, from audio
frequencies into the GHz range.
During the last 50 years the basic constituents of ferrites have
changed little, but purity of raw materials and process control
have improved dramatically. Ferrites are ceramic materials with
the general chemical formula MO.Fe
more divalent metal oxides blended with 48 to 60 mole percent
*Footnote: The difference between hard and soft ferrite is not tactile, but rather a magnetic characteristic.
F a ir-R it e Prod uct s C o rp .
Phone:
Introduction
(888) FAIR RITE / [phone] • FAX: (888) FERRITE / [phone]
[phone]
Soft ferrite does not retain significant magnetization, whereas hard ferrite magnetization is considered permanent.
3
O
4
). The most plentiful deposits
2
O
3
, where MO is one or
(888) 337 -7483
*
of iron oxide. Fair-Rite manufactures four broad groups of soft
ferrite materials:
Manganese zinc (Fair-Rite 31, 33, 73, 75, 76, 77, 78 and 79 mate-
rial)
Nickel zinc (Fair-Rite 42, 43, 44, 51, 52, 61, 67 and 68 material)
Manganese (Fair-Rite 85 material)
Magnesium zinc (Fair-Rite 46 material)
Manganese zinc ferrites are completely vitrified and have very low
porosity. They have the highest permeabilities and exhibit volume
resistivities ranging from one hundred to several thousand ohm-
centimeter. Manganese zinc ferrite components are used in tuned
circuits and magnetic power designs from the low kilohertz range
into the broadcast spectrum. These ferrites have a linear expan-
sion coefficient of approximately 10 ppm/
The nickel zinc ferrites vary in porosity, and frequently contain ox-
ides of other metals, such as those of magnesium, manganese,
copper or cobalt. Volume resistivities range from several kilohm-
centimeter to tens of megohm-centimeter.In general, they are used
at higher frequencies (above 1 MHz), and are suitable for low flux
density applications. Nickel zinc ferrites have a linear expansion
coefficient of approximately 8 ppm/
The manganese ferrite is a dense, temperature stable material
displaying a high degree of squareness in its hysteresis loop.
This makes this material uniquely suited for such applications as
multiple output control in switched-mode power supplies and high
frequency magnetic amplifiers.
The magnesium zinc ferrite has similar characteristics as NiZn
ferrite. The composition of MgZn material does not contain any
nickel, hence avoiding potential environmental issues as well as
reducing the raw material component cost.
As is evident from the flow diagram on page 3, there is consid-
erable processing involved, and the manufacturing cycle will take
a minimum of two weeks. The parts listed in the catalog repre-
sent a broad cross section of the wide variety of cores produced
by Fair-Rite Products. Large OEM quantitites are manufactured
by Fair-Rite to order. Most of the more commonly used parts
are stocked by our distributors, offering prompt deliveries. For a
complete listing of our distributors visit our site on the Internet at
www.fair-rite.com.
Many of the parts produced by Fair-Rite are made to customer
specifications, and we welcome inquiries involving application-
specific designs. We have the capability to design tooling rapidly,
and have it fabricated either by our own tool shop or by outside
vendors.
• www.fair-rite.com
• E-Mail: [e-mail]
PO Box J, One Commercial Row, Wallkill, NY 12589-0288
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