BLM21AG601SN1

Manufacturer Part NumberBLM21AG601SN1
ManufacturerMurata
BLM21AG601SN1 datasheet
 


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Page 96/163:

Impulse Noise Absorption

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!Note
• Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this PDF catalog to prevent smoking and/or burning, etc.
!Note
This catalog has only typical specifications. Therefore, you are requested to approve our product specifications or to transact the approval sheet for product specificaions before ordering.
• 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.
EMI Suppression Effect
!Impulse Noise Absorption
(Comparison between VFM41R and Standard 2-terminal Varistor)
Type of Filter
Voltage Waveform
Original Waveform
Frequency Spectrum
Final voltage falls below 0V because of the effect of signal reflection.
Voltage Waveform
The commonly used
2-terminal varistor
Frequency Spectrum
Voltage Waveform
Chip Solid EMIGUARD r VFM41R
Frequency Spectrum
Noise Suppression Effect of VFM Series
[TESTING CIRCUIT]
Sample
Impulse Generator
(Zo 50 )
(Pulse Width 100ns)
EMI Suppression Effect
2225
1675
1125
575
25
–50
0
50
100
150
200
Time [ns]
30
20
10
0
–10
–20
10MHz
990MHz
Frequency [LINEAR]
300
200
174V peak
100
0
–100
–50
0
50
100
150
200
Time [ns]
30
20
10
0
–10
–20
10MHz
990MHz
Frequency [LINEAR]
300
200
76V peak
100
0
–100
–50
0
50
100
150
200
Time [ns]
30
20
10
0
–10
–20
10MHz
990MHz
Frequency [LINEAR]
C31E9.pdf 03.3.12
Oscilloscope
50
Attenuator
Description
The Lower chart is a frequency
response of the upper chart. Note that
the scale of original wave chart and that
of the output wave chart is different
because of circumstances.
The rising part of pulse, which is mostly
consists of high-frequency element,
remains because inductance in
electrodes becomes obstacle.
The 3-terminal structure minimizes the
effect of inductance in electrodes and
pulse rising noise is absorbed
completely.
95
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