HI28B2039 FerriShield, HI28B2039 Datasheet - Page 9

• Manufacturer Part Number: HI28B2039
• Description: FERRITE BEAD
• Manufacturer: FerriShield

Specifications of HI28B2039

• Impedance: 410ohm
• Width (latch Included): 45.7mm
• Internal Diameter: 11mm
• Frequency: 100MHz
• Size: 43.2 Mm X 50.8 Mm X 45.7 Mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For attenuation properties by frequency, see page 32
Anywhere There is an Antenna-Like Structure
CABLING
RFI suppressor functions
Application Points
FerriShield installation locations.
usually radiate their RFI power at frequencies above 30 MHz by way of the main cabling, which acts as an antenna.
presence of high speed microprocessor signals, cables will conduct, radiate and/or receive unwanted high frequency
interfering signals. Control of radio frequency interference can be assured by proper placement of an insertion loss
device, such as a ferrite suppressor.
A. Data signals and high frequency interference signals
B. All high frequency interference absorbed by ferrite
C. Low frequency data signals pass unimpeded
A
Just snap over circuit wiring to be controlled - even after wiring has been terminated Radio interference sources
Electronic cabling and wires, by virtue of their length-to-width ratios, are perfect natural antennas. In the
Installation is simple
absorbed and conducted
suppressor and thermally dissipated
B
C
BUS BARS
RFI suppressor functions: bus bars
Advantages
cubic volume stands out as the most important advantage. Prior
to the development of bisected ferrites, suppression engineering
was restricted to the costly addition of filters, cable shielding,
and less versatile solid core (not bisected) ferrites. While these
methods offer a degree of suppression, they are often awkward to
install and, in many cases, are not completely effective. Bisected
ferrites have a concentrated, homogeneous magnetic structure
with high permeability. They are consistently stable versus time
and temperature, and provide RF suppression without high eddy
current losses.
Compared to other alternatives, ferrites’ high resistivity per
9
A. Power distribution and high frequency interference
B. All high frequency interference absorbed by ferrite
C. Power distribution characteristics pass unimpeded
signals a b s o r b e d a n d conducted
suppressor and thermally dissipated
A
ferrites for interference control
B
C