EMI Core
EMI Cores
Ring Type
●Allspecificationsinthiscatalogandproductionstatusofproductsaresubjecttochangewithoutnotice.Priortothepurchase,pleasecontactNECTOKINforupdatedproductdata.
●Pleaserequestforaspecificationsheetfordetailedproductdatapriortothepurchase.
●Beforeusingtheproductinthiscatalog,pleaseread"Precautions"andothersafetyprecautionslistedintheprintedversioncatalog.
9634ESDVOL09E1106E2
Bead Type
1
10000
1000
100
10
1
10
1000
100
Impedance ()
Impedance ()
Frequency (MHz)
B-20F-28
1 10 100 1000
Frequency (MHz)
B-20F-38
1 10 100 1000
Impedance vs. Frequency
Beads 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
●Allspecificationsinthiscatalogandproductionstatusofproductsaresubjecttochangewithoutnotice.Priortothepurchase,pleasecontactNECTOKINforupdatedproductdata.
●Pleaserequestforaspecificationsheetfordetailedproductdatapriortothepurchase.
●Beforeusingtheproductinthiscatalog,pleaseread"Precautions"andothersafetyprecautionslistedintheprintedversioncatalog.
9634ESDVOL09E1106E2
Bead Type
1
10
1000
100
1
10
1000
100
1
10
1000
100
1
10
1000
100
1
10
1000
100
1
10
1000
100
Impedance ()
Frequency (MHz)
B-20F-46
1 10 100 1000
Impedance ()
Frequency (MHz)
B-20L-34
1 10 100 1000
Impedance ()
Frequency (MHz)
B-20L-25
1 10 100 1000
Impedance ()
Frequency (MHz)
B-20F-57
1 10 100 1000
Impedance ()
Frequency (MHz)
B-20L-44
1 10 100 1000
Impedance ()
Frequency (MHz)
B-20L-48B
Impedance ()
Frequency (MHz)
B-20L-95B
1 10 100 1000
1
10
1000
100
1 10 100 1000
Impedance vs. Frequency