-9-
AB2.8X4.5DY 4.0±0.2 5.7±0.3 0.9min PBTBlack 10,000
AB3X2X3DY 4.0±0.2 4.2±0.3 0.9min PBTBlack 10,000
AB3X2X4.5DY 4.0±0.2 5.7±0.3 1.3min PBTGray 10,000
AB4X2X4.5DY 5.0±0.2 5.7±0.3 2.7min PBTBlack 5,000
AB4X2X6DY 5.0±0.2 7.2±0.3 3.6min PBTBlack 5,000
AMOBEADS
2.NoiseSuppressionDevicesAMOBEADS
2.NoiseSuppressionDevicesAMOBEADS
B[T]
40 80
0
0.4
0.6
-0.6
-0.4
-0.2
0.2
-80 -40
Amorphous
Ferrite
H[A/m]
B-HCurve(typical)
AB3X2X3W 4.0 1.5 4.5 3.0 2.0 3.0 0.9 3.0
AB3X2X4.5W 4.0 1.5 6.0 3.0 2.0 4.5 1.3 5.0
AB3X2X6W 4.0 1.5 7.5 3.0 2.0 6.0 1.8 7.0
AB4X2X4.5W 5.0 1.5 6.0 4.0 2.0 4.5 2.7 9.0
AB4X2X6W 5.0 1.5 7.5 4.0 2.0 6.0 3.6 12.0
AB4X2X8W 5.0 1.5 9.5 4.0 2.0 8.0 4.8 16.0
FinishedDimensions[mm] CoreSize[mm]*1 TotalFlux
*
2 ALvalue
*
3
O.D.max
I.D.min H.T.max
O.D.
I.D.
H.T. φc[μWb]min L[μH]min
W
L
H
AMOBEADS withlead
AB/LBSeries
AB/LBSeries
ExampleforNoiseSuppressingEffect(ChopperConverter)
With an excellent saturable characteristic, "AMOBEADS " suppress the reverse recovery current of
thediodeanddecreasethenoisethatisoccurring.Whenthecurrentfordiodereversesandtriesto
go into the recovery condition, the "AMOBEADS " displays a large inductance and oppose the
generationoftherecoverycurrent.Inthisinstance,asoftrecoveryispossibleforcorematerialwitha
smallercoerciveforce.
WithoutCountermeasure WithAMOBEADS
(AB4×2×8W)
OutputNoise
DiodeCurrent
1A/div
2,000
An amorphous noise suppression device is unique and completely different from conventional noise
filters.Conventionalnoisepreventionproductsfocusonsomehowminimizingthenoiseafterit'sbeen
created,bytypicallytryingtoabsorbthenoise,andsotheireffectivenessinnoisereductionisdirectly
influencedbyfrequencyofthecircuit.Amorphousnoisesuppressingdevices,ontheotherhand,focus
onthesourceofthenoiseandworktopreventorminimizethenoisebeforeithasachancetodevelop.
The source of the electronic circuit noise is the rapid change of current or voltage, and the
effectivenessoftheamorphouscoresineliminatingthisnoiseisindependentoffrequency.
Anamorphousnoisesuppressiondeviceisaproductthattakesfulladvantageoftheuniquemagnetic
characteristicsofthecobaltbasedamorphousalloy.ToshibaMaterialsofferstwonoisesuppression
devices, "AMOBEADS " and "SPIKE KILLERS ". AMOBEADS " deliver excellent noise suppression
resultsandareconvenienttousebysimplybeingslippedovertheleadsofthesemiconductordevice.
"AMOBEADS"arealsoavailablewithaleadthruandinasurfacemountconfiguration."SPIKEKILLERS",which
are larger in size than "AMOBEADS ", most often are wire wound and are effective in eliminating or
minimizinghighernoiselevels.
Packing
Unit
[pcs/box]
Insulating
Cover
StandardSpecifications
☆"AMOBEADS "samplekitsareavailable.Pleaseasksalesdepartment.
☆"AMOBEADS "and"SPIKEKILLER ":RegisteredtrademarksofTOSHIBAMATERIALSCo.,Ltd.
☆"AMOBEADS "and"SPIKEKILLER ":ResisteredinU.S.A.,France,Germany,U.K.,Japan.
3.3
2.4
14.7
AB4X2X6SM
AB3X2X3SM
2.0
2.4
9.4
BasicSnubberCircuitDiagram
NoiseSuppressionDevice
RCSnubber MagneticSnubber
TypeNo.
PBTcase
Blue
SMDTypeAMOBEADS
AB3X2X3SM 5.0±0.3 5.0±0.3 4.0±0.3 (1.8×0.35) (6.0) 0.9min 3.0 2,000
AB4X2X6SM 6.0±0.3 8.0±0.3 5.0±0.3 (1.8×0.52) (9.0) 3.6min 12.0 1,000
TypeNo.
*4 *2 *3
[A] φc[μWb] L[μH]
Io TotalFlux ALvalue
LCPcase
Black
Lead
FinishedDimensions[mm]
width length height
widthxthickness
Insulating
Cover
Packing
Unit
[pcs/reel]
*1ReferenceValue*2MinimumGuaranteeonMeasuringCondition:50kHz、80A/m(sinewave),R.T.
*3MeasuringCondition:50kHz,1V,1turn,R.T.
*4TypicalValue,usingacrosssectionoflead
*5MeasuringCondition:100kHz,80A/m(sinewave),R.T.*6Tolerance±0.2[mm]
*7ConvertedfromInductanceValueL
1
at1kHz、100mA(sinewave)、R.T.
φc(μWb)=0.282xL
1
(μH)
FinishedDimensions[mm]
TotalFlux*7
O.D. H.T. φc[μWb]
※Innerdiametercanpassthrougha1.2X0.7mmlead.
Insulating
Cover
PackingUnit
[
pcs
/bag]
TypeNo.
Current
Totalflux
ALValue
[A] φc[μWb] L[μH]
LB4X2X8F 16.0max 4.2±0.5 14.0±1.0 φ1.25±0.1
LB4X2X8U 20.0max 4.0±0.5 5.0±1.0 φ1.25±0.1
*4 *2 *3
1,000
FinishedDimensions[mm]
[pcs/box]
4.8
min 16.0
min
(8.0)
TypeNo.
Insulating
Cover
PBTcase
Black
RecommendedLandPattern(mm)
Radialtaping
(Recommendforbigdemand,10,000pcs/lot)
D0
P
P0
a
d
B
D
E
F
LB4X2X8U
Current*4 TotalFlux*7
I[A] φc[μWb]
3,000
LB2.8X4.5U 12.7 12.7 φ4.0 9.0max φ0.8 (5) 0.9min
Packing
Unit
B
D
E
F
LB4X2X8F
WseriesDYsereis
DYseries(lowprice)
Wseries
Bulktype
RoHS
compliantproducts
RoHS
compliantproducts
B D E F
TypeNo.
[pcs/box]
Packing
Unit
P[mm] Po[mm] Do[mm] a[mm] d[mm]