Laird Technologies
Web site: www.LairdTech.com
Item # 28B1142-000, Broadband Solid Ferrite Cores for Round Cables and Wiring Harnesses
Laird Technologies' Cylindrical EMI suppression ferrites provide a cost effective means of reducing common and differential mode EMI. These cores are most
frequently used to suppress common mode EMI on the internal and external cable assemblies of electronic equipment. By decreasing the levels of EMI radiated by
internal cables, ferrite cores can reduce the cost and amount of overall shielding required to confine EMI within a product's enclosure. They may also be successfully
used on power cables that carry digital or analog signaling. To achieve maximum EMI filtering performance in a given application, select a ferrite with an inner diameter
most closely matching the outer diameter of the wire or wire bundle to be filtered. The in-circuit impedance may be substantially increased by passing 2 turns of the
wire conductor through the ferrite core. A typical common mode application might have two conductors passed through a ferrite core. With equal and opposite currents
flowing through the core, zero net bias is established through the component, and maximum impedance is thus realized from the ferrite.
SPECIFICATIONS
Figure Number
1
Typical Z Ohms at 25 MHz
34
Nominal Z Ohms at 100 MHz
85
Typical Z Ohms at 300 MHz
200
Dimension A
29.01 mm
1.142 in
Dimension B
19.00 mm
0.748 in
Dimension C
7.49 mm
0.295 in
Material Type
Broad Band Material
Product Type Code
Round Cylindrical Cores
Part Size Code
1142
Additional Description
Standard Part
12/4/2012 | Page 1 of 1
PCB设计
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