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C31E6.pdf 01.5.29
BLM41 Series(4516 Size)
1
0.7±0.3
4.5±0.2
1.6±0.2
in mm
Part Number
BLM41AF800SN1
BLM41AF151SN1
BLM41PF800SN1
BLM41PG600SN1
BLM41PG750SN1
BLM41PG181SN1
BLM41PG471SN1
BLM41PG102SN1
Impedance (at 100MHz)
(ohm)
80
±25%
150
±25%
80 (Typ.)
60 (Typ.)
75 (Typ.)
180 (Typ.)
470 (Typ.)
1000 (Typ.)
Rated Current
(mA)
500
200
1000
6000
3000
3000
2000
1500
DC Resistance(max.)
(ohm)
0.10
0.50
0.10
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
BLM41P series require derating above 85°C ambient. Please contact us for details.
s
Equivalent Cirucit
(Resistance element becomes dominant
at high frequencies.)
s
Impedance-Frequency (Typical)
BLM41P Series (80-180ohm)
400
1200
BLM41P Series (470-1000ohm)
300
Impedance (Ω)
PG181SN1
200
AF151SN1
Impedance (Ω)
900
PG102SN
600
PG471SN
AF800SN1
100
PG600SN1
PG750SN1
0
1
10
100
Frequency (MHz)
1000
1
10
100
Frequency (MHz)
1000
300
PF800SN1
0
1.6±0.2
51
This is the PDF file of catalog No.C31E-6
C31E6.pdf 01.5.29
1
s
Impedance-Frequency Characteristics
BLM41AF800SN1
100
200
BLM41AF151SN1
Z
75
Impedance (Ω)
R
50
Impedance (Ω)
150
Z
100
R
X
25
X
50
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
BLM41PF800SN1
100
100
BLM41PG600SN1
Z
75
Impedance (Ω)
Impedance (Ω)
R
50
75
Z
R
50
X
25
25
X
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
BLM41PG750SN1
100
400
BLM41PG181SN1
Z
75
R
Impedance (Ω)
Impedance (Ω)
300
50
200
Z
R
X
25
100
X
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
BLM41PG471SN1
600
1200
BLM41PG102SN1
450
Z
Impedance (Ω)
Impedance (Ω)
900
Z
R
R
600
300
X
300
X
150
0
1
10
100
Frequency (MHz)
1000
0
1
10
100
Frequency (MHz)
1000
Continued on the following page.
52
This is the PDF file of catalog No.C31E-6
Continued from the preceding page.
C31E6.pdf 01.5.29
s
Notice (Rating)
When the BLM--P series is for Large-current used in
operating temperatures exceeding + 85D, derating of
current is necessary. Please apply the derating curve shown
below according to the operating temperature.
[Derating]
BLM21PG220SN1
BLM31PG330SN1
6 BLM41PG600SN1
Derated Current [A]
5
4 BLM21PG600/300SN1
BLM31PG121/500SN1
BLM41PG181/750SN1
3
BLM31PG391SN1, BLM41PG471SN1
BLM21PG221SN1
2
BLM21PG331SN1, BLM31PG601SN1, BLM41PG102SN1
BLM41PF800SN1
1
0
85
Operating Temperature [D]
125
1
53
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
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