EMI Core
EMI Cores
Ring Type
●Allspecificationsinthiscatalogandproductionstatusofproductsaresubjecttochangewithoutnotice.Priortothepurchase,pleasecontactNECTOKINforupdatedproductdata.
●Pleaserequestforaspecificationsheetfordetailedproductdatapriortothepurchase.
●Beforeusingtheproductinthiscatalog,pleaseread"Precautions"andothersafetyprecautionslistedintheprintedversioncatalog.
9634ESDVOL09E1106E2
Bead T
ype
1
10000
1000
100
10
1
10
1000
100
Imped
a
nce (
)
Imped
a
nce
(
)
Fre
qu
ency (MHz)
B-20F-28
1
10
100
1000
Fre
qu
ency (MHz)
B-20F-
3
8
1
10
100
1000
Impedance vs. Frequency
Be
a
ds Cores
OD
H
ID
Shape and Dimensions
Bead Cores
[RoHS Compliant]
Bead Cores
[RoHS Compliant]
B-20F-28
2.8
1.3
3.0
●
B-20F-38
3.8
1.5
4.3
●
B-20F-46
4.6
1.5
4.3
●
B-20F-57
5.7
1.5
8.0
●
B-20L-25
2.5
1.0
1.2
●
B-20L-34
3.4
0.8
4.4
●
B-20L-44
4.4
1.6
7.0
●
B-20L-48B
4.8
2.4
4.8
●
B-20L-95B
9.7
4.8
4.2
●
(coated)
※
Above frequency range is a reference only. Please test with actual device before use.
Model
Dimensions (mm)
Frequency range
Remarks
OD
ID
H
up to 100MHz
up to 300MHz
(mainly AM band range)
(mainly FM band range)
EMI Core
EMI Cores
Ring Type
●Allspecificationsinthiscatalogandproductionstatusofproductsaresubjecttochangewithoutnotice.Priortothepurchase,pleasecontactNECTOKINforupdatedproductdata.
●Pleaserequestforaspecificationsheetfordetailedproductdatapriortothepurchase.
●Beforeusingtheproductinthiscatalog,pleaseread"Precautions"andothersafetyprecautionslistedintheprintedversioncatalog.
9634ESDVOL09E1106E2
Bead T
ype
1
10
1000
100
1
10
1000
100
1
10
1000
100
1
10
1000
100
1
10
1000
100
1
10
1000
100
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20F-46
1
10
100
1000
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20L-
3
4
1
10
100
1000
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20L-25
1
10
100
1000
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20F-57
1
10
100
1000
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20L-44
1
10
100
1000
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20L-48B
Imped
a
nce (
)
Fre
qu
ency (MHz)
B-20L-95B
1
10
100
1000
1
10
1000
100
1
10
100
1000
Impedance vs. Frequency
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