This is the PDF file of catalog No.C31E-6
C31E6.pdf 01.5.29
BLM31 Series(3216 Size)
0.7±0.3
1
3.2±0.2
1.6±0.2
in mm
Part Number
BLM31AF700SN1
BLM31AJ260SN1
BLM31AJ601SN1
BLM31BE601FN1
BLM31PG330SN1
BLM31PG500SN1
BLM31PG121SN1
BLM31PG391SN1
BLM31PG601SN1
Impedance (at 100MHz)
(ohm)
70
±25%
26
±25%
600
±25%
600
±25%
33 (Typ.)
50 (Typ.)
120 (Typ.)
390 (Typ.)
600 (Typ.)
Rated Current
(mA)
200
500
200
300
6000
3000
3000
2000
1500
DC Resistance(max.)
(ohm)
0.15
0.05
0.90
0.35
0.01
0.025
0.025
0.05
0.09
Operating Temperature Range
(°C)
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
BLM31P series require derating above 85°C ambient. Please contact us for details.
s
Equivalent Cirucit
s
Impedance-Frequency (Typical)
BLM31 Series
800
AJ601SN1
600
PG601SN1
Impedance (Ω)
PG391SN1
400
BE601FN1
PG330SN1
PG121SN1
200
PG500SN1
AF700SN1
AJ260SN1
(Resistance element becomes dominant
at high frequencies.)
0
1
10
100
Frequency (MHz)
1000
s
Impedance-Frequency Characteristics
BLM31AF700SN1
100
40
BLM31AJ260SN1
Z
75
Impedance (Ω)
Impedance (Ω)
R
30
Z
R
20
50
X
25
10
X
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
Continued on the following page.
1.1±0.2
49
This is the PDF file of catalog No.C31E-6
Continued from the preceding page.
C31E6.pdf 01.5.29
1
s
Impedance-Frequency Characteristics
BLM31AJ601SN1
800
800
BLM31BE601SN1
600
Z
Impedance (Ω)
R
400
Impedance (Ω)
Z
600
R
400
200
X
200
X
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
BLM31PG330SN1
60
80
BLM31PG500SN1
Z
45
Impedance (Ω)
Impedance (Ω)
Z
R
30
60
R
40
X
20
15
X
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
BLM31PG121SN1
200
600
BLM31PG391SN1
150
Impedance (Ω)
Impedance (Ω)
Z
R
450
Z
R
300
100
50
X
150
X
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
BLM31PG601SN1
800
600
Z
Impedance (Ω)
R
400
X
200
0
1
10
100
Frequency (MHz)
1000
50
This is the PDF file of catalog No.C31E-6
C31E6.pdf 01.5.29
1
EMI Suppression Effect
Noise Suppression Effect of BLM_R Series
!Waveform
Distortion Suppressing
Performance of BLM--R Series
[Measuring Circuits]
Measuring Point
AC04
1MHz
Filter
Pattern 20cm
AC00
Type of Filter
EMI Suppression Effect / Description
Signal waveform (100nsec/div, 2V/div)
Expand (10nsec/div, 2V/div)
85
80
Level [dB
µV]
75
70
65
60
55
Spectrum
Initial
(No filter)
50
45
30 50
100
150
200
250
Frequency [MHz]
300
Ringing is caused on the signal waveform
Such ringing contains several hundred MHz harmonic components and generates noise.
Signal waveform (100nsec/div, 2V/div)
Expand (10nsec/div, 2V/div)
85
80
Level [dB
µV]
75
70
65
60
55
Spectrum
Resister (47Ω) is used
50
45
30 50
100
150
200
250
Frequency [MHz]
300
Comparing initial waveform, ringing is suppresed a little.
However there still remains high level waveform distortion.
Signal waveform (100nsec/div, 2V/div)
Expand (10nsec/div, 2V/div)
85
80
Level [dB
µV]
75
70
65
60
55
Spectrum
BLM18RK221SN1
(220Ω at 100MHz)
is used
50
45
30 50
100
150
200
250
Frequency [MHz]
300
BLM18R has excellent performance for noise suppression and waveform distortion suppression.
BLM18R suppresses drastically not only spectrum level in more than 100MHz range but waveform distortion.
54
This is the PDF file of catalog No.C31E-6
C31E6.pdf 01.5.29
Outlines of EMI Suppression Filter (EMIFILr) for DC Line
oChip
Ferrite Bead
oFerrite
Bead Inductor
Chip Ferrite Bead
.............P.24–65
Ferrite Bead Inductor
..........P.129–130
BLM15
BLM18
BLM21
BL01
BLA31
BL02RN1R3J2B
BL02RN2R3J2B
BLM31
BLM41
BL02RN1
BL02RN2R1M2B
BL03RN2R1M1B
"
Inductor type EMI suppression filters are effective for fre-
quencies ranging from a few MHz to a few GHz. Inductor
type filters are widely used as a low noise
countermeasure, as well as a universal noise
suppression component.
"
The inductor type EMIFILr produce a micro inductance in
the low frequency range. At high frequencies, however,
the resistive component of the inductor produces the
primary impedance. When inserted in series in the noise
producing circuit, the resistive impedance of the inductor
prevents noise propagation.
[Equivalent Circuit]
R(f)
[Impedance-Frequency Characteristics(typical)]
1000
800
Impedance [Ω]
600
Z
400
200
0
R
X
1
10
100
Frequency [MHz]
1000
R : Real Part (Resistive Portion)
X : Imaginary Part (Inductive Portion)
17
This is the PDF file of catalog No.C31E-6
C31E6.pdf 01.5.29
o
Part Numbering
the "Global Part Numbers" that have been adopted
and the
(
The structure ofquestions about details, inquire at your usual Muratasince June 2001distributor.meaning of each code are described herein.
)
If you have any
sales office or
Chip EMIFILr Inductor Type
(Global Part Number)
qProduct
ID
Product ID
BL
wType
Code
A
M
D
eDimension
(LgW)
Code
15
18
21
31
32
41
rCharacteristics
Code
Ap
*1
Bp
*2
Pp
*3
RK
HG
HD
Characteristics
for General Use
for High-speed Signal Lines
for Power Supplies
for Digital Interface
for GHz Band General Use
for GHz Band High-speed Signal Line
oPackaging
Code
K
L
B
J
D
C
Packaging
Plastic Taping (ø330mm Reel)
Plastic Taping (ø180mm Reel)
Bulk
Paper Taping (ø330mm Reel)
Paper Taping (ø180mm Reel)
Bulk Case
Dimension (LgW)
1.00g0.50mm
1.60g0.80mm
2.00g1.25mm
3.20g1.60mm
3.20g2.50mm
4.50g1.60mm
EIA
0402
0603
0805
1206
1210
1806
iNumbers
of Circuit
Code
1
4
6
8
Numbers of Circuit
1Circuit
4Circuit
6Circuit
8Circuit
Type
Array Type
Monolithic Type
Monoblock Type
uCategory
Code
N
H
Category
Standard Type
for Automotive Electoronics
Chip Ferrite Beads
BL
q
M
w
18
e
AG
r
102
t
S
N
1 D
tImpedance
Expressed by three figures. The unit is in ohm (Ω). The first and
second figures are significant digits, and the third figure
expresses the number of zeros which follow the two figures.
yPerformance
Expressed by an alphabet.
Ex.)
Code
S
Performance
Sn Plating
y u i o
*1 For standard type,
p
is expressed by "G".
*2
p
is expressed by "A", "B" or "D".
*3
p
is expressed by "G", "M", "B", "F".
2
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