Datasheet

Chip Ferrite BeadChip EMIFILr
Chip Common Mode Choke Coil
Block Type EMIFILrMicrowave Absorber
!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
sales representatives or product engineers before ordering.
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C31E.pdf
09.4.20
70
10
20
30
40
50
60
70
300 400 500 600 700 800 900 1000
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
Level (dBµV/m)
Level (dBµV/m)
Level (dBµV/m)
10
20
30
40
50
60
70
300 400 500 600 700 800 900 1000
Initial
10
20
30
40
50
60
70
300 400 500 600 700 800 900 1000
Initial
BLM18AG102SN1
2000
1500
1000
500
0
101 100 1000 2000
BLM18HG102SN1
BLM18AG102SN1
Frequency (MHz)
Impedance (Ω)
74HC0074AC0474HCU04
10MHz
Measured radiation at 3m distance
BLM
Noise Suppression in UHF Range
Type of Filter EMI Suppression Effect / Description
Comparison between BLM18HG102SN1 and BLM18AG102SN1 (Current Item)
Initial
(No filter)
Conventional Type
BLM18AG102SN1
(1000Ω at 100MHz)
for GHz Noise Suppression
BLM18HG102SN1
(1000Ω at 100MHz)
Testing Circuit
Current BLM are effective in
suppressing noise in the range between
300MHz and 700MHz.
In addition to the effectiveness of
current BLM, BLM18HG suppresses
noise in the range beyond 700MHz.
BLMppH Series
EMI
Suppression
Effect