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BL01RN Datasheet, PDF (85/163 Pages) List of Unclassifed Manufacturers – On-Board Type (DC) EMI Suppression Filters
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C31E9.pdf 03.3.12
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On-Board Type (DC) EMI Suppression Filters (EMIFILr)
Chip EMIFILr LC Combined Winding Type NFW31S Series
The signal line chip EMI filter NFW31S series consists
of high performance EMI suppression filters. They are
designed for noise suppression in high speed signal
digital circuits in which the signal harmonics are
prone to becoming noise sources. These filters achieve
a 100dB/dec. (typ.) damping characteristic with
Murata's innovative circuit design. This makes these
chips effective in applications where the signal and
2
noise frequencies are close to each other.
s Features
1. Suppresses signal noise with little or no
attenuation of the signal itself.
2. Murata's original internal structure design enables
excellent noise suppression up to high frequencies
(40dB at 1GHz typ.).
3. The NFW31S series is available in six different
values of cut-off frequency ranging from 10MHz up
to 500MHz.
2.3±0.2
3.2±0.3
(1)
(2)
(3)
0.7±0.3
0.7±0.3
0.65±0.2
1.6±0.2
(1) : Input electrode
(2) : Ground electrode
(3) : Output electrode
∗No polarity.
(in mm)
Part Number
Nominal Cut-off Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation
Freq.
at 10MHz at 20MHz at 50MHz at 100MHz at 150MHz at 200MHz at 300MHz at 400MHz at 500MHz at 1000MHz
(MHz)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
NFW31SP106X1E4
10
6 max. 5 min. 25 min. 25 min.
-
25 min.
-
-
30 min. 30 min.
NFW31SP206X1E4
20
-
6 max. 5 min. 25 min.
-
25 min.
-
-
30 min. 30 min.
NFW31SP506X1E4
50
-
-
6 max. 10 min.
-
30 min.
-
-
30 min. 30 min.
NFW31SP107X1E4 100
-
-
-
6 max.
-
5 min.
-
-
20 min. 30 min.
NFW31SP157X1E4 150
-
-
-
-
6 max.
-
10 min. 20 min 30 min. 30 min.
NFW31SP207X1E4 200
-
-
-
-
-
6 max.
-
-
10 min. 30 min.
NFW31SP307X1E4 300
-
-
-
-
-
-
6 max.
-
5 min. 15 min.
NFW31SP407X1E4 400
-
-
-
-
-
-
-
6 max.
-
10 min.
NFW31SP507X1E4 500
-
-
-
-
-
-
-
-
6 max. 10 min.
Rated Current : 200mA Rated Voltage : 25Vdc Operating Temperature Range : -40°C to 85°C
s Equivalent Circuit
(1) Input
Output (3)
GND
(2)
No polarity.
s Insertion Loss Characteristics (Typical)
0
NFW31SP157X1E4
NFW31SP207X1E4
20
NFW31SP307X1E4
NFW31SP407X1E4
NFW31SP507X1E4
40
NFW31SP106X1E4
NFW31SP206X1E4
60
NFW31SP506X1E4
NFW31SP107X1E4
80
1
5 10
50 100
Frequency (MHz)
(50Ω - 50Ω)
500 1000 2000
84
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