SURFACE MOUNT EMI FILTERS
CHIP FERRITE BEADS
BLM
R Series
The BLM
R Series ferrite beads are designed to minimize
signal wave form distortion while exhibiting high impedance
characteristics.
FEATURES
I
Low signal distortion
I
High impedance characteristics
I
Small size
APPLICATIONS
I
Digital Interface Circuits
PART NUMBERING SYSTEM
BLM
11
R
121
SK
PT
CHIP FERRITE
SERIES
SIZE
11: 1.6 x 0.8mm
21: 2.0 x 1.25mm
LOW DISTORTION
R: Low
Distortion
Type
IMPEDANCE CODE
at 100MHz
121: 120 ohms
471: 470 ohms
CHARACTERISTICS
PACKAGING
CODE
PB: Bulk
PT: Tape 7” Reel
PT1: Tape 13” Reel
SPECIFICATIONS
Dimensions: mm
Part Number
Impedance (Ohms)
Typ. at 100MHz
120
220
200
BLM11R471SK
BLM11R601SK
BLM11R102SK
Rated Current
(mA)
DCR
(Ohms max.)
0.25
0.3
0.5
0.6
Operating
Temperature
Range
0603
BLM11R121SK
BLM11R221SK
0.8 ± 0.15
0.4 ± 0.2
470
600
1000
120
220
470
600
1000
200
100
1.6 ± 0.15
0.8 ± 0.15
0.8
0.15
0.2
0.25
0.3
0.5
–55°C
~
+125°C
0805
BLM21R121SK
BLM21R221SK
BLM21R471SK
BLM21R601SK
BLM21R102SK
0.5 ± 0.2
0.85 ± 0.2
2.0 ± 0.2
1.25 ± 0.2
Available as standard through authorized Murata Electronics Distributors.
174
CG01-J
SURFACE MOUNT EMI FILTERS
CHIP FERRITE BEADS
BLM
TYPICAL IMPEDANCE CHARACTERISTICS
BLM11R121SK
200
Impedance (Ohms)
Impedance (Ohms)
150
100
50
0
R Series
BLM11R221SK
400
300
200
100
0
BLM11R471SK
600
Impedance (Ohms)
450
300
150
0
1
10
100
1000
1
10
100
1000
1
10
100
1000
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
BLM11R601SK
1000
Impedance (Ohms)
BLM11R102SK
1200
Impedance (Ohms)
900
600
300
0
BLM21R121SK
200
Impedance (Ohms)
150
100
50
0
750
500
250
0
1
10
100
1000
1
10
100
1000
1
10
100
1000
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
BLM21R221SK
300
Impedance (Ohms)
BLM21R471SK
600
Impedance (Ohms)
450
300
150
0
BLM21R601SK
1000
Impedance (Ohms)
750
500
250
0
225
150
75
0
1
10
100
1000
1
10
100
1000
1
10
100
1000
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
SURFACE MOUNT
EMI FILTERS
BLM21R102SK
1200
Impedance (Ohms)
900
600
300
0
1
10
100
1000
Frequency (MHz)
CG01-J
175
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