Impedance Rated DCR Operating
Dimensions: mm Part Number (Ohms) Current (Ohms max.) Temperature
Typ. @ 100MHz (mA) Range
BLM10A100S 10 500 0.05
BLM10A700S 70
200
0.40
BLM10A121S 120 0.50
BLM10A221SG 220 100 0.70
BLM10A601SG 600
50
1.10
BLM10A102SG 1000 1.50
BLM11A121S 120 0.2 –55 ~ +125°C
BLM11A151SG 150 0.25
BLM11A221S 220
200
0.3
BLM11A331SG 330 0.45
BLM11A471SG 470
0.5
BLM11A601S 600
BLM11A102S 1000 100 0.7
0603
SPECIFICATIONS
162 CG01-J
SURFACE MOUNT EMI FILTERS
CHIP FERRITE BEADS
0.4 ± 0.2
1.6 ± 0.15 0.8 ± 0.15
0.8 ± 0.15
BLM

A Series
The BLMA Series ferrite beads provide outstanding
electrical characteristics in packages as small as 0402.
For noise applications covering a wide frequency range.
FEATURES
■ Suitable for flow and reflow soldering
■Wide temperature range
■High Z characteristics
APPLICATIONS
■ I/O ports, DC power lines, and Signal lines
BLM 11 A 471 SG PT
CHIP FERRITE SIZE STANDARD IMPEDANCE CODE CHARACTERISTICS PACKAGING CODE
SERIES 10: 1.0 x 0.5mm SIGNAL at 100MHz PB: Bulk
11: 1.6 x 0.8mm A: Standard 471: 470 ohms PT: Tape 7”Reel
21: 2.0 x 1.25mm 121: 120 ohms PT1: Tape 13”Reel
31: 3.2 x 1.6mm 102: 1000 ohms
41: 4.5 x 1.6mm
PART NUMBERING SYSTEM
0402
1.0 ± 0.1 0.5 ± 0.1
0.5 ± 0.1
0.25 ± 0.1
Available as standard through authorized Murata Electronics Distributors.
Impedance Rated DCR Operating
Dimensions: mm Part Number (Ohms) Current (Ohms max.) Temperature
Typ. @ 100MHz (mA) Range
BLM21A121F 120 0.15
BLM21A151SG 150 0.15
BLM21A221SG 220 0.20
BLM21A331SG 330 200 0.25 –55 ~ +125°C
BLM21A401S 400 0.85
BLM21A471SG 470 0.25
BLM21A601F 600 0.3
BLM21A601R 600 500 0.3 –55 ~ +85°C
BLM21A601S 600 1.1
–55 ~ +125°C
BLM21A102F 1000 200 0.45
BLM21A102S 1000 0.45 –55 ~ +85°C
BLM31A260S 26 500 0.05
BLM31A700S 70
200
0.15
BLM31A601S 600 0.90 –55 ~ +125°C
BLM41A800S 80 500 0.1
BLM41A151S 150 200 0.5
1206
1806
SPECIFICATIONS
CG01-J 163
SURFACE MOUNT EMI FILTERS
CHIP FERRITE BEADS
0.7 ± 0.3
3.2 ± 0.2
1.1 ± 0.2*
*1.6 ± 0.3
on BLM31A700S
1.6 ± 0.2
0.7 ± 0.3
4.5 ± 0.2
1.6 ± 0.2
1.6 ± 0.2
BLM

A Series
0805
2.0 ± 0.2
0.85 ± 0.2
1.25 ± 0.2
0.5 ± 0.2
Available as standard through authorized Murata Electronics Distributors.
SURFACE MOUNT
EMI FILTERS
BLM10A100S
Impedance (Ohms)
SURFACE MOUNT EMI FILTERS
CHIP FERRITE BEADS
TYPICAL IMPEDANCE CHARACTERISTICS
BLM10A700S BLM10A121S
164 CG01-J
BLMA Series
25
20
15
10
5
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
200
160
120
80
40
01 10 100 1000
Frequency (MHz)
Impedance (Ohms)
200
160
120
80
40
01 10 100 1000
Frequency (MHz)
BLM11A121S
Impedance (Ohms)
BLM11A151SG
BLM11A601S
200
160
120
80
40
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
250
200
150
100
50
01 10 100 1000
Frequency (MHz)
Impedance (Ohms)
1000
800
600
400
200
0
1 10 100 1000
Frequency (MHz)
BLM11A331SG
Impedance (Ohms)
BLM11A471SG
BLM11A221S
500
400
300
200
100
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
1000
800
600
400
200
01 10 100 1000
Frequency (MHz)
Impedance (Ohms)
400
320
240
160
80
01 10 100 1000
Frequency (MHz)
BLM11A102S
Impedance (Ohms)
BLM21A121F
2000
1600
1200
800
400
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
200
160
120
80
40
01 10 100 1000
Frequency (MHz)
BLM10A221SG
400
300
200
100
0
Impedance (Ohms)
1 10 100 1000
Frequency (MHz)
BLM10A601SG
1000
750
500
250
0
Impedance (Ohms)
1 10 100 1000
Frequency (MHz)
BLM10A102SG
1200
900
600
300
0
Impedance (Ohms)
1 10 100 1000
Frequency (MHz)
BLM21A221SG
Impedance (Ohms)
SURFACE MOUNT EMI FILTERS
CHIP FERRITE BEADS
TYPICAL IMPEDANCE CHARACTERISTICS
BLM21A331SG
BLM21A401S
CG01-J 165
BLMA Series
400
320
240
160
80
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
500
400
300
200
100
01 10 100 1000
Frequency (MHz)
Impedance (Ohms)
500
400
300
200
100
01 10 100 1000
Frequency (MHz)
BLM21A471SG
Impedance (Ohms)
BLM21A601F
BLM21A102S
1000
800
600
400
200
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
1000
800
600
400
200
01 10 100 1000
Frequency (MHz)
Impedance (Ohms)
1500
1200
900
600
300
0
1 10 100 1000
Frequency (MHz)
BLM21A601S
Impedance (Ohms)
BLM21A102FBLM21A601R
1000
800
600
400
200
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
1500
1200
900
600
300
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
1000
800
600
400
200
01 10 100 1000
Frequency (MHz)
BLM31A260S
Impedance (Ohms)
BLM31A700S
BLM31A601S (For low speed signal line)
50
40
30
20
10
0
1 10 100 1000
Frequency (MHz)
Impedance (Ohms)
100
80
60
40
20
01 10 100 1000
Frequency (MHz)
1 10 100 1000
Frequency (MHz)
1 10 100 1000
Frequency (MHz)
1 10 100 1000
Frequency (MHz)
BLM41A800S
Impedance (Ohms)
100
80
60
40
20
0
BLM41A151S
Impedance (Ohms)
200
160
120
80
40
0
Impedance (Ohms)
1000
800
600
400
200
0
BLM21A151SG
Impedance (Ohms)
250
200
150
100
50
01 10 100 1000
Frequency (MHz)
SURFACE MOUNT
EMI FILTERS