KEMET-ESD-SR-160G

EMI Cores  

ESD-SR Snap-on Cores for Round Cables  

for Low & High Frequency (with case)  

Overview  

Applications  

The KEMET ESD-SR Series snap-on toroidal cores are  

designedꢀforꢀuseꢀonꢀroundꢀcables.ꢀTheꢀwideꢀrangeꢀofꢀ  

ManganeseꢀZincꢀ(MnZn)ꢀandꢀNickelꢀZincꢀ(NiZn)ꢀoptionsꢀ  

allowsꢀforꢀtargetingꢀofꢀspecificꢀfrequencyꢀranges.  

• Consumer

 

electronics  

• Airconditioners  

• Power

 

conditioners  

•ꢀ Refrigerators  

•ꢀ Washingꢀmachines  

•ꢀ Industrialꢀequipment  

•ꢀ Medicalꢀequipment  

• Adapters  

EMI cores are part of a family of passive components which  

addressꢀtheꢀissuesꢀofꢀnoiseꢀorꢀelectromagneticꢀinterferenceꢀ  

(EMI)ꢀinꢀcircuitsꢀorꢀsystems.  

•ꢀ Audio-visualꢀequipment  

• Business

 

multifunction printers  

Benefits  

•ꢀ MnZnꢀ≤ꢀ10ꢀMHzꢀ(AMꢀbandꢀrange)ꢀandꢀNiZnꢀ≤ꢀ300ꢀMHz  

(FMꢀbandꢀrange)ꢀoptionsꢀavailable  

• Split

 

construction  

•ꢀ Easyꢀtoꢀinstallꢀthroughꢀitsꢀsnap-onꢀmecanism  

•ꢀ Quickꢀsolutionꢀforꢀpost-cableꢀassemblyꢀnoiseꢀissue  

•ꢀ Operatingꢀtemperatureꢀrangeꢀfromꢀ−25°Cꢀtoꢀ+85°C  

•ꢀ UL94ꢀV–0ꢀflameꢀretardantꢀratedꢀcase  

Built Into Tomorrow  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

1

EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Part Number System  

ESD-  

Series  

ESD-  

SR-  

S

38  

G

CoreꢀSize  

OuterꢀDimensionꢀCodeꢀ(mm)  

Form Type  

Snap-on  

Shape type  

Case Color  

Blank = Sleeve  

Sꢀ=ꢀRing  

SeeꢀTableꢀ1  

Blank = Black  

G = Gray  

Note:  

Mꢀ=ꢀBlackꢀ(Mn-Zn)  

Figure 1 – How to count turns  

Turns and Impedance Characteristics  

WhenꢀtheꢀdesiredꢀperformanceꢀofꢀanꢀEMIꢀcoreꢀcannotꢀbeꢀ  

obtainedꢀwithꢀaꢀsingleꢀpassꢀthroughꢀtheꢀcore,ꢀtheꢀimpedanceꢀ  

characteristicsꢀcanꢀbeꢀchangedꢀwithꢀmultipleꢀturns.  

1T  

2T  

3T  

Aꢀturnꢀisꢀcountedꢀbyꢀtheꢀnumberꢀofꢀlead-wireꢀwindingsꢀwhichꢀpassꢀ  

throughꢀtheꢀinnerꢀholeꢀofꢀtheꢀcore.ꢀWindingsꢀonꢀtheꢀoutsideꢀofꢀtheꢀ  

core do not count.  

Figure 2 – Relationship between impedance and turn count.  

(Representative example: ESD-R-16C)  

SeeꢀFigureꢀ1ꢀforꢀexamplesꢀofꢀone,ꢀtwo,ꢀandꢀthreeꢀturns.  

10,000  

Resonance point changes to lower band  

Addingꢀturnsꢀwillꢀresultꢀinꢀhigherꢀimpedanceꢀwhileꢀalsoꢀloweringꢀ  

theꢀeffectiveꢀfrequencyꢀrange.  

3T  

1,000  

100  

10  

2T  

1T  

SeeꢀFigureꢀ2ꢀforꢀanꢀexample.  

1

1

10  

100  

1,000  

Core Material and Effective Frequency  

Range  

Frequency (MH

z)  

There are two ferrite material options for KEMET  

EMIꢀCores:ꢀNickelꢀZincꢀ(Ni-Zn)ꢀandꢀManganeseꢀ  

Zincꢀ(Mn-Zn).ꢀEachꢀcoreꢀmaterialꢀhasꢀaꢀdifferentꢀ  

Figure 3 – Effective band range of Mn-Zn and Ni-Zn ferrite core material.  

(Representative example, measured with same-dimension ring core)  

1,000  

resistanceꢀandꢀeffectiveꢀfrequencyꢀrange.ꢀTheꢀ  

MnZn core material has a lower resistance  

comparedꢀtoꢀtheꢀNi-Zn;ꢀtherefore,ꢀadequateꢀ  

insulationꢀisꢀrequiredꢀbeforeꢀuse.  

AM band range  

FM band range  

Ni-Zn series core  

100  

Mn-Zn series core  

TheꢀNi-Znꢀcoreꢀmaterialꢀisꢀtypicallyꢀeffectiveꢀ  

forꢀfrequenciesꢀinꢀtheꢀMHzꢀbandꢀrangeꢀsuchꢀasꢀ  

theꢀFM-band,ꢀwhileꢀtheꢀMn-Znꢀcoreꢀmaterialꢀisꢀ  

10  

typicallyꢀeffectiveꢀforꢀtheꢀkHzꢀbandꢀrangeꢀsuchꢀasꢀ  

theꢀAM-band.ꢀSeeꢀFigureꢀ3.  

1

0.01  

0.1  

1

10  

100  

1,000  

It is recommended to measure the actual  

frequencyꢀrangeꢀeffectivenessꢀinꢀtheꢀtargetꢀ  

Frequency (MH

z)  

application.  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

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EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Magnetic Permeability of Ferrite Material  

Inꢀorderꢀtoꢀachieveꢀmostꢀefficientꢀnoiseꢀreduction,ꢀitꢀisꢀimportantꢀtoꢀselectꢀtheꢀmaterialꢀaccordingꢀtoꢀtheꢀtargetꢀfrequencyꢀ  

band.ꢀDependingꢀonꢀitsꢀmagneticꢀpermeability,ꢀaꢀparticularꢀferriteꢀmaterialꢀwillꢀbeꢀeffectiveꢀinꢀaꢀcertainꢀfrequencyꢀband.  

Aꢀschematicꢀrepresentationꢀofꢀtheꢀrelationshipꢀbetweenꢀtheꢀmagneticꢀpermeabilityꢀofꢀeachꢀmaterialꢀandꢀtheꢀcorrespondingꢀ  

effectiveꢀbandꢀrangeꢀisꢀshownꢀinꢀFigureꢀ1.ꢀMaterialsꢀwithꢀhigherꢀmagneticꢀpermeabilityꢀareꢀeffectiveꢀinꢀtheꢀlowerꢀfrequencyꢀ  

range,ꢀwhileꢀthoseꢀwithꢀlowerꢀmagneticꢀpermeabilityꢀareꢀeffectiveꢀinꢀtheꢀhigherꢀfrequencyꢀrange.ꢀThus,ꢀMn-Znꢀproductsꢀareꢀ  

mainlyꢀusedꢀforꢀreducingꢀconductionꢀnoise,ꢀwhileꢀNi-Znꢀproductsꢀareꢀcommonlyꢀusedꢀforꢀradiationꢀnoiseꢀcountermeasures.  

Theꢀeffectiveꢀfrequencyꢀrangeꢀvariesꢀdependingꢀonꢀcoreꢀshape,ꢀsizeꢀandꢀnumberꢀofꢀwindings.ꢀThisꢀfrequencyꢀdependenceꢀ  

ofꢀtheꢀmagneticꢀpermeabilityꢀasꢀshownꢀinꢀtheꢀfigureꢀservesꢀforꢀreferenceꢀpurposesꢀonlyꢀandꢀitꢀshouldꢀbeꢀtestedꢀonꢀtheꢀactualꢀ  

device to determine its effectiveness.  

S18H,ꢀS15H,ꢀ10H,ꢀ7H,ꢀ5H,ꢀ1400Lꢀandꢀ700LꢀareꢀKEMET’sꢀproprietaryꢀferriteꢀmaterialꢀnames.  

Otherꢀmaterialsꢀcanꢀalsoꢀbeꢀavailableꢀonꢀrequest.  

Figure 4 – Relationship between the magnetic permeability of each material and its effective frequency range  

20,000  

Higher magnetic permeability:  

Higher noise suppression effect  

in the lower frequency range  

Mn-Zn Series  

S18H  

S15H  

10H  

10,000  

Lower magnetic permeability:  

Higher noise suppression effect  

in the higher frequency range  

7H  

5H  

Ni-Zn Series  

1400L  

700L  

0

10 kHz  

100 kHz  

1 MHz  

10 MHz  

100 MHz  

1 GHz  

Effective Frequency Range  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

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EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Environmental Compliance  

AllꢀKEMETꢀEMIꢀcoresꢀareꢀRoHSꢀcompliant.  

Dimensions – Millimeters  

ESD-SR Type  

ESD-SR-S Type  

B

B

ØD  

A

ØD  

A

C

C

ESD-SR-S-M Type  

A

ØD  

C

See Table 1 for dimensions  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

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EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Installation Example  

ESD-SR & ESD-SR-S  

Types  

ESD-SR-S-M  

Type  

Performance Characteristics  

Item  

Performance Characteristics  

Operatingꢀtemperature  

Frequencyꢀrange  

Outer diameter  

Inner diameter  

Thickness  

−40°Cꢀtoꢀ+85°C  

Lowꢀfrequencyꢀandꢀhighꢀfrequency  

14.4 – 64.0 mm  

5.0 – 35.0 mm  

15.5 – 39.0 mm  

Case  

Type  

Caseꢀflameꢀresistantꢀrating  

Material  

UL94 V–0  

MnZnꢀ5HꢀandꢀNiZnꢀ700L  

Table 1 – Ratings & Part Number Reference  

Dimensions (mm)  

Part  

Weight  

(g)  

Frequency Range

1  

≤ 10 MHz

 

≤ 300 MHz  

Material  

Case  

Color  

Number  

B

A

C

ØD  

MnZN  

NiZn  

Maximum  

(AM band range)

 

(FM band range)  

ESD-SR-100  

ESD-SR-100G  

ESD-SR-110  

ESD-SR-110G  

ESD-SR-S10  

ESD-SR-120  

ESD-SR-120G  

ESD-SR-150  

ESD-SR-150G  

ESD-SR-160  

ESD-SR-160G  

ESD-SR-250  

ESD-SR-250G  

ESD-SR-S16  

ESD-SR-S25  

16.5ꢀMaximum  

16.5ꢀMaximum  

14.4ꢀMaximum  

14.4ꢀMaximum  

15.5ꢀMaximum  

16.0ꢀMaximum  

16.0ꢀMaximum  

19.6ꢀMaximum  

19.6ꢀMaximum  

20.2ꢀMaximum  

20.2ꢀMaximum  

31.5ꢀMaximum  

31.5ꢀMaximum  

23.0ꢀMaximum  

33.0ꢀMaximum  

16.5  

16.5  

14.2  

14.2  

14.0  

16.4  

16.4  

20.3  

20.3  

20.0  

20.0  

31.6  

31.6  

20.0  

29.0  

21.0ꢀMaximum  

21.0ꢀMaximum  

28.0ꢀꢀMaximum  

28.0ꢀꢀMaximum  

18.5ꢀMaximum  

33.0ꢀMaximum  

33.0ꢀMaximum  

37.4ꢀMaximum  

37.4ꢀMaximum  

39.0ꢀMaximum  

39.0ꢀMaximum  

38.0ꢀMaximum  

38.0ꢀMaximum  

20.5ꢀMaximum  

15.5ꢀMaximum  

≤ꢀ6.0  

≤ꢀ6.0  

≤ꢀ5.0  

≤ꢀ5.0  

≤ꢀ6.0  

≤ꢀ6.0  

≤ꢀ6.0  

≤ꢀ7.0  

≤ꢀ7.0  

≤ꢀ9.0  

≤ꢀ9.0  

≤ꢀ13.0  

≤ꢀ13.0  

≤ꢀ8.0  

≤ꢀ14.5  

7.2  

7.2  

6.9  

6.9  

4.1  

13.3  

13.3  

23.4  

23.4  

22.7  

22.7  

59.5  

59.5  

12.9  

21.3  

Black  

Gray  

Black  

Gray  

Black  

Black  

Gray  

Black  

Gray  

Black  

Gray  

Black  

Gray  

Black  

Black  

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

700L  

ESD-SR-S10M  

ESD-SR-S38M  

ESD-SR-S47M  

ESD-SR-S57M  

15.5ꢀMaximum  

44.0 ±1.0  

53.0 ±1.0  

14.0  

18.5ꢀMaximum  

16.5 ±1.0  

19.0 ±1.0  

≤ꢀ6.0  

18.0  

26.0  

35.0  

4.1  

58.0  

89.0  

159.0  

Beige  

Black  

Black  

Black  

X

X

X

X

5H  

5H  

5H  

5H  

–

–

–

–

–

–

–

64.0 ±1.0  

24.0 ±1.0  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

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EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Impedance vs. Frequency  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

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EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Impedance vs. Frequency cont.  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

7

EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Impedance vs. Frequency cont.  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

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EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

Packaging  

Part Number  

Packaging Type  

Pieces per Box  

ESD-SR-100  

ESD-SR-100G  

ESD-SR-110  

900  

ESD-SR-110G  

ESD-SR-S10  

ESD-SR-120  

ESD-SR-120G  

ESD-SR-150  

ESD-SR-150G  

ESD-SR-160  

ESD-SR-160G  

ESD-SR-250  

ESD-SR-250G  

ESD-SR-S16  

ESD-SR-S25  

ESD-SR-S10M  

ESD-SR-S38M  

ESD-SR-S47M  

ESD-SR-S57M  

800  

700  

400  

60  

Tray  

280  

200  

800  

72  

36  

Handling Precautions  

EMIꢀCoresꢀshouldꢀbeꢀstoredꢀinꢀnormalꢀworkingꢀenvironments.ꢀWhileꢀtheꢀEMIꢀCoresꢀthemselvesꢀareꢀquiteꢀrobustꢀinꢀotherꢀ  

environments,ꢀavoidꢀexposureꢀtoꢀhighꢀtemperatures,ꢀhighꢀhumidity,ꢀcorrosiveꢀatmospheresꢀandꢀlongꢀtermꢀstorageꢀforꢀcase,ꢀ  

snap-on and split types.  

KEMETꢀrecommendsꢀthatꢀmaximumꢀstorageꢀtemperatureꢀnotꢀexceedꢀ40°Cꢀandꢀmaximumꢀstorageꢀhumidityꢀnotꢀexceedꢀ75%ꢀ  

relativeꢀhumidity.ꢀAtmospheresꢀshouldꢀbeꢀfreeꢀofꢀchlorine,ꢀsulfurꢀandꢀalkaliꢀbearingꢀcompounds.ꢀAvoidꢀalsoꢀstorageꢀnearꢀ  

strongꢀmagneticꢀfieldsꢀasꢀthisꢀmightꢀmagnetizeꢀtheꢀproduct.  

Temperatureꢀfluctuationsꢀshouldꢀbeꢀminimizedꢀtoꢀavoidꢀcondensationꢀorꢀcracksꢀonꢀtheꢀparts.ꢀMechanicalꢀshocksꢀcanꢀbringꢀ  

to cracks as well.  

Export Control  

For customers in Japan  

Forꢀproductsꢀthatꢀareꢀcontrolledꢀitemsꢀsubjectꢀtoꢀtheꢀ“ForeignꢀExchangeꢀandꢀForeignꢀTradeꢀLaw”ꢀofꢀJapan,ꢀtheꢀexportꢀlicenseꢀ  

specifiedꢀbyꢀtheꢀlawꢀisꢀrequiredꢀforꢀexport.  

For customers outside Japan  

EMIꢀCoreꢀproductsꢀshouldꢀnotꢀbeꢀusedꢀorꢀsoldꢀforꢀuseꢀinꢀtheꢀdevelopment,ꢀproduction,ꢀstockpilingꢀorꢀutilizationꢀofꢀanyꢀ  

conventionalꢀweaponsꢀorꢀmass-destructiveꢀweaponsꢀ(nuclearꢀweapons,ꢀchemicalꢀorꢀbiologicalꢀweapons,ꢀorꢀmissiles),ꢀorꢀanyꢀ  

other weapons.  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023  

9

EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)  

KEMET Electronics Corporation Sales Offices  

Disclaimer  

YAGEOꢀCorporationꢀandꢀitsꢀa ꢀꢀliatesꢀdoꢀnotꢀrecommendꢀtheꢀuseꢀofꢀcommercialꢀorꢀautomotiveꢀgradeꢀproductsꢀforꢀhighꢀreliabilityꢀapplicationsꢀorꢀmannedꢀspaceꢀ ꢀight.  

Allꢀproductꢀspeci ꢀcations,ꢀstatements,ꢀinformationꢀandꢀdataꢀ(collectively,ꢀtheꢀ“Information”)ꢀinꢀthisꢀdatasheetꢀareꢀsubjectꢀtoꢀchange.ꢀTheꢀcustomerꢀisꢀresponsibleꢀforꢀ  

checkingꢀandꢀverifyingꢀtheꢀextentꢀtoꢀwhichꢀtheꢀInformationꢀcontainedꢀinꢀthisꢀpublicationꢀisꢀapplicableꢀtoꢀanꢀorderꢀatꢀtheꢀtimeꢀtheꢀorderꢀisꢀplaced.ꢀAllꢀInformationꢀgivenꢀ  

hereinꢀisꢀbelievedꢀtoꢀbeꢀaccurateꢀandꢀreliable,ꢀbutꢀitꢀisꢀpresentedꢀwithoutꢀguarantee,ꢀwarranty,ꢀorꢀresponsibilityꢀofꢀanyꢀkind,ꢀexpressedꢀorꢀimplied.  

StatementsꢀofꢀsuitabilityꢀforꢀcertainꢀapplicationsꢀareꢀbasedꢀonꢀKEMETꢀElectronicsꢀCorporation’sꢀ(“KEMET”)ꢀknowledgeꢀofꢀtypicalꢀoperatingꢀconditionsꢀforꢀsuchꢀ  

applications,ꢀbutꢀareꢀnotꢀintendedꢀtoꢀconstituteꢀ–ꢀandꢀKEMETꢀspeci ꢀcallyꢀdisclaimsꢀ–ꢀanyꢀwarrantyꢀconcerningꢀsuitabilityꢀforꢀaꢀspeci ꢀcꢀcustomerꢀapplicationꢀorꢀuse.ꢀ  

TheꢀInformationꢀisꢀintendedꢀforꢀuseꢀonlyꢀbyꢀcustomersꢀwhoꢀhaveꢀtheꢀrequisiteꢀexperienceꢀandꢀcapabilityꢀtoꢀdetermineꢀtheꢀcorrectꢀproductsꢀforꢀtheirꢀapplication.ꢀAnyꢀ  

technicalꢀadviceꢀinferredꢀfromꢀthisꢀInformationꢀorꢀotherwiseꢀprovidedꢀbyꢀKEMETꢀwithꢀreferenceꢀtoꢀtheꢀuseꢀofꢀKEMET’sꢀproductsꢀisꢀgivenꢀgratis,ꢀandꢀKEMETꢀassumesꢀnoꢀ  

obligationꢀorꢀliabilityꢀforꢀtheꢀadviceꢀgivenꢀorꢀresultsꢀobtained.  

AlthoughꢀKEMETꢀdesignsꢀandꢀmanufacturesꢀitsꢀproductsꢀtoꢀtheꢀmostꢀstringentꢀqualityꢀandꢀsafetyꢀstandards,ꢀgivenꢀtheꢀcurrentꢀstateꢀofꢀtheꢀart,ꢀisolatedꢀcomponentꢀ  

failuresꢀmayꢀstillꢀoccur.ꢀAccordingly,ꢀcustomerꢀapplicationsꢀwhichꢀrequireꢀaꢀhighꢀdegreeꢀofꢀreliabilityꢀorꢀsafetyꢀshouldꢀemployꢀsuitableꢀdesignsꢀorꢀotherꢀsafeguardsꢀ  

(suchꢀasꢀinstallationꢀofꢀprotectiveꢀcircuitryꢀorꢀredundancies)ꢀinꢀorderꢀtoꢀensureꢀthatꢀtheꢀfailureꢀofꢀanꢀelectricalꢀcomponentꢀdoesꢀnotꢀresultꢀinꢀaꢀriskꢀofꢀpersonalꢀinjuryꢀorꢀ  

propertyꢀdamage.  

Althoughꢀallꢀproduct–relatedꢀwarnings,ꢀcautionsꢀandꢀnotesꢀmustꢀbeꢀobserved,ꢀtheꢀcustomerꢀshouldꢀnotꢀassumeꢀthatꢀallꢀsafetyꢀmeasuresꢀareꢀindicatedꢀorꢀthatꢀotherꢀ  

measuresꢀmayꢀnotꢀbeꢀrequired.  

WhenꢀprovidingꢀKEMETꢀproductsꢀandꢀtechnologiesꢀcontainedꢀhereinꢀtoꢀotherꢀcountries,ꢀꢀtheꢀcustomerꢀmustꢀabideꢀbyꢀtheꢀproceduresꢀandꢀprovisionsꢀstipulatedꢀinꢀallꢀ  

applicableꢀexportꢀlawsꢀandꢀregulations,ꢀincludingꢀwithoutꢀlimitationꢀtheꢀInternationalꢀTra ꢀꢀcꢀinꢀArmsꢀRegulationsꢀ(ITAR),ꢀtheꢀUSꢀExportꢀAdministrationꢀRegulationsꢀ  

(EAR)ꢀandꢀtheꢀJapanꢀForeignꢀExchangeꢀandꢀForeignꢀTradeꢀAct.  

KEMET is a registered trademark of KEMET Electronics Corporation.  

© KEMET Electronics Corporation • One East Broward Boulevard  

E5005_ESD-SR • 8/8/2023

 

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