BLM21BB221SH1D Murata, BLM21BB221SH1D Datasheet - Page 91

• Manufacturer Part Number: BLM21BB221SH1D
• Description: EMI/RFI Suppressors & Ferrites 0805 220ohms HiSpeed Signal Line Tape
• Manufacturer: Murata
• Series: BLM Br

Specifications of BLM21BB221SH1D

• Shielding: Unshielded
• Test Frequency: 100 MHz
• Product: Chip Ferrite Beads
• Impedance: 220 Ohms
• Tolerance: 25 %
• Maximum Dc Current: 200 mAmps
• Maximum Dc Resistance: 0.35 Ohms
• Operating Temperature Range: - 55 C to + 125 C
• Package / Case: 0805 (2012 metric)
• Termination Style: SMD/SMT
• Dc Resistance Max: 0.35ohm
• Dc Current Rating: 200mA
• Ferrite Mounting: SMD
• Ferrite Case Style: 0805 / 2012
• Operating Temperature Max: +125°C
• Operating Temperature Min: -55°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

!Note
• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our
• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
sales representatives or product engineers before ordering.
!Note
7. Characteristics of Inductors Used
8. Capacitive-Inductive EMI Suppression Filters
9. Other EMI Suppression Filters
in EMI Suppression Filters
General-purpose inductors also function to suppress
noise when configured in series with a noise producing
circuit. However, when general-purpose inductors are
used, resonance may result in peripheral circuits, signal
wave forms may become distorted, and satisfactory
impedance may not be obtained at noise frequencies
(due to insufficient high frequency impedance
characteristics).
The inductors used for Murata's EMI suppression filters
are designed to function nearly as a resistor at noise
frequencies, which greatly reduces the possibility of
resonance and leaves signal wave forms undistorted.
And since sufficient impedance is obtained for
frequencies ranging to hundreds of MHz, these
specifically designed inductors operate effectively to
suppress high-frequency noise. (See Fig.)
If capacitive and inductive suppression characteristics are
combined, it is possible to configure a much higher
performance filter. In signal circuit applications where this
combination is applied, noise suppression effects which
have little influence on the signal wave form become
possible.
This type of filter is also effective in the suppression of
high-speed signal circuit noise. When used in DC power
circuits, capacitive-inductive filters prevent resonance
from occurring in peripheral circuits, thus making it
In addition to the capacitive-inductive filter, Murata also
has a common mode choke coil, effective for common
mode noise suppression.
Murata also has a range of built-in filter connectors which
greatly reduce filter mounting space requirements.
possible to achieve significant noise suppression under
normal service conditions.
Continued from the preceding page.
• Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
Principles of Noise Suppression by DC EMIFILr
Equivalent Circuit
Example of impedance frequency characteristics of
inductor type EMIFILr
1200
(Resistance element becomes dominant at high frequency.)
900
600
300
0
1
BLM18AG102
10
Frequency (MHz)
R(f)
Continued on the following page.
Z
100
R
X
1000
C50E.pdf
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