This is the PDF file of catalog No.C31E-6
C31E6.pdf 01.5.29
On-Board Type (DC) EMI Suppression Filters(EMIFILr)
Chip EMIFILr LC Combined Winding Type NFW31S Series
The signal line chip EMI filter NFW31S series consist of
0.7±0.2
2.6±0.3
0.7±0.2
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 noise
frequencies are close to each other.
6.8±0.5
1.6±0.3
in mm
■ Features
1. The filters suppress signal noise with little or no
9
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 NFW31 series is available in six different values
of cutoff frequency ranging from 10MHz up to 500MHz.
Nominal Cutoff Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation Attenuation
Part Number
Freq.
at 10MHz
(dB)
at 20MHz
(dB)
at 50MHz
(dB)
at 100MHz
(dB)
at 150MHz
(dB)
at 200MHz
(dB)
at 300MHz
(dB)
at 400MHz
(dB)
at 500MHz at 1000MHz
(MHz)
(dB)
(dB)
NFW31SP106X1E4
NFW31SP206X1E4
NFW31SP506X1E4
NFW31SP107X1E4
NFW31SP157X1E4
NFW31SP207X1E4
NFW31SP307X1E4
NFW31SP407X1E4
NFW31SP507X1E4
10
20
6 max.
5 min.
25 min.
25 min.
-
25 min.
-
-
30 min.
30 min.
-
-
-
-
-
-
-
-
6 max.
5 min.
25 min.
-
25 min.
-
-
30 min.
30 min.
20 min.
30 min.
10 min.
5 min.
-
30 min.
30 min.
30 min.
30 min.
30 min.
15 min.
10 min.
10 min.
50
-
-
-
-
-
-
-
6 max.
10 min.
-
30 min.
-
-
100
150
200
300
400
500
-
-
-
-
-
-
6 max.
-
5 min.
-
-
-
-
-
-
-
6 max.
-
10 min.
20 min
-
-
-
-
6 max.
-
-
-
-
-
6 max.
-
-
-
6 max.
-
6 max.
Rated Current : 200mA
Rated Voltage : 25Vdc
Operating Temperature Range : -40°C to 85°C
■ Insertion Loss Characteristics (Typical)
0
NFW31SP157X1E4
NFW31SP207X1E4
20
NFW31SP307X1E4
NFW31SP407X1E4
NFW31SP507X1E4
40
NFW31SP106X1E4
NFW31SP206X1E4
60
80
NFW31SP506X1E4
NFW31SP107X1E4
1
5
10
50
100
500 1000 2000
Frequency (MHz)
82