1© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
One world. One KEMET
EMI Cores
ESD-SR Snap-on Cores for Round Cables
for Low & High Frequency (with case)
Benets
• MnZn≤10MHz(AMbandrange)andNiZn≤300MHz
(FMbandrange)optionsavailable
• Split construction
• Easytoinstallthroughitssnap-onmecanism
• Quicksolutionforpost-cableassemblynoiseissue
• Operatingtemperaturerangefrom−25°Cto+85°C
• UL94V–0ameretardantratedcase
Overview
The KEMET ESD-SR Series snap-on toroidal cores are
designedforuseonroundcables.Thewiderangeof
ManganeseZinc(MnZn)andNickelZinc(NiZn)options
allowsfortargetingofspecicfrequencyranges.
EMI cores are part of a family of passive components which
addresstheissuesofnoiseorelectromagneticinterference
(EMI)incircuitsorsystems.
Applications
• Consumer electronics
• Airconditioners
• Power conditioners
• Refrigerators
• Washingmachines
• Industrialequipment
• Medicalequipment
• Adapters
• Audio-visualequipment
• Business multifunction printers
2© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
Part Number System
ESD- SR- S38 G
Series Form Type Shape type CoreSize
OuterDimensionCode(mm) Case Color
ESD- Snap-on Blank = Sleeve
S=Ring
SeeTable1 Blank = Black
G = Gray
Note:
M=Black(Mn-Zn)
Turns and Impedance Characteristics
WhenthedesiredperformanceofanEMIcorecannotbe
obtainedwithasinglepassthroughthecore,theimpedance
characteristicscanbechangedwithmultipleturns.
Aturniscountedbythenumberoflead-wirewindingswhichpass
throughtheinnerholeofthecore.Windingsontheoutsideofthe
core do not count.
SeeFigure1forexamplesofone,two,andthreeturns.
Addingturnswillresultinhigherimpedancewhilealsolowering
theeffectivefrequencyrange.
SeeFigure2foranexample.
Core Material and Effective Frequency
Range
There are two ferrite material options for KEMET
EMICores:NickelZinc(Ni-Zn)andManganese
Zinc(Mn-Zn).Eachcorematerialhasadifferent
resistanceandeffectivefrequencyrange.The
MnZn core material has a lower resistance
comparedtotheNi-Zn;therefore,adequate
insulationisrequiredbeforeuse.
TheNi-Zncorematerialistypicallyeffective
forfrequenciesintheMHzbandrangesuchas
theFM-band,whiletheMn-Zncorematerialis
typicallyeffectiveforthekHzbandrangesuchas
theAM-band.SeeFigure3.
It is recommended to measure the actual
frequencyrangeeffectivenessinthetarget
application.
3T2T1T
Figure 1 – How to count turns
Impedance Increase
Resonance point changes to lower band
3T
2T
1T
Impedance (Ω)
Frequency (MHz)
10,000
1 10 100 1,000
1,000
100
10
1
Figure 2 – Relationship between impedance and turn count.
(Representative example: ESD-R-16C)
Impedance (Ω)
Frequency (MHz)
AM band range FM band range
Mn-Zn series core
Ni-Zn series core
1,000
100
10
1
0.01 0.1 1 10 100 1,000
Figure 3 – Effective band range of Mn-Zn and Ni-Zn ferrite core material.
(Representative example, measured with same-dimension ring core)
3© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
Magnetic Permeability of Ferrite Material
Inordertoachievemostecientnoisereduction,itisimportanttoselectthematerialaccordingtothetargetfrequency
band.Dependingonitsmagneticpermeability,aparticularferritematerialwillbeeffectiveinacertainfrequencyband.
Aschematicrepresentationoftherelationshipbetweenthemagneticpermeabilityofeachmaterialandthecorresponding
effectivebandrangeisshowninFigure1.Materialswithhighermagneticpermeabilityareeffectiveinthelowerfrequency
range,whilethosewithlowermagneticpermeabilityareeffectiveinthehigherfrequencyrange.Thus,Mn-Znproductsare
mainlyusedforreducingconductionnoise,whileNi-Znproductsarecommonlyusedforradiationnoisecountermeasures.
Theeffectivefrequencyrangevariesdependingoncoreshape,sizeandnumberofwindings.Thisfrequencydependence
ofthemagneticpermeabilityasshowninthegureservesforreferencepurposesonlyanditshouldbetestedontheactual
device to determine its effectiveness.
S18H,S15H,10H,7H,5H,1400Land700LareKEMET’sproprietaryferritematerialnames.
Othermaterialscanalsobeavailableonrequest.
Figure 4 - Relationship between the magnetic permeability of each material and its effective frequency range
10 kHz
0
10,000
20,000
100 kHz 1 MHz 10 MHz 100 MHz 1 GHz
Effective Frequency Range
Magnetic Permeability
Ni-Zn Series
1400L
700L
S18H
S15H
10H
7H
5H
Mn-Zn Series
Lower magnetic permeability:
Higher noise suppression effect
in the higher frequency range
Higher magnetic permeability:
Higher noise suppression effect
in the lower frequency range
4© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
Environmental Compliance
AllKEMETEMIcoresareRoHScompliant.
Dimensions – Millimeters
B
A
ØD
C
ESD-SR Type
CØD
A
ESD-SR-S-M Type
B
A
ØD
C
ESD-SR-S Type
See Table 1 for dimensions
5© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
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
Operatingtemperature −40°Cto+85°C
Frequencyrange Lowfrequencyandhighfrequency
Outer diameter 14.4 – 64.0 mm
Inner diameter 5.0 – 35.0 mm
Thickness 15.5 – 39.0 mm
Type Case
Caseameresistantrating UL94 V–0
Material MnZn5HandNiZn700L
Table 1 – Ratings & Part Number Reference
Part
Number
Dimensions (mm) Weight
Case
Color
Frequency Range1Material
AB
Maximum CØD (g) ≤ 10 MHz
(AM band range)
≤ 300 MHz
(FM band range) MnZN NiZn
ESD-SR-100
16.5Maximum
16.5
21.0Maximum
≤6.0
7.2
Black
X
–
700L
ESD-SR-100G
16.5Maximum
16.5
21.0Maximum
≤6.0
7.2
Gray
X
–
700L
ESD-SR-110
14.4Maximum
14.2
28.0Maximum
≤5.0
6.9
Black
X
–
700L
ESD-SR-110G
14.4Maximum
14.2
28.0Maximum
≤5.0
6.9
Gray
X
–
700L
ESD-SR-S10
15.5Maximum
14.0
18.5Maximum
≤6.0
4.1
Black
X
–
700L
ESD-SR-120
16.0Maximum
16.4
33.0Maximum
≤6.0
13.3
Black
X
–
700L
ESD-SR-120G
16.0Maximum
16.4
33.0Maximum
≤6.0
13.3
Gray
X
–
700L
ESD-SR-150
19.6Maximum
20.3
37.4Maximum
≤7.0
23.4
Black
X
–
700L
ESD-SR-150G
19.6Maximum
20.3
37.4Maximum
≤7.0
23.4
Gray
X
–
700L
ESD-SR-160
20.2Maximum
20.0
39.0Maximum
≤9.0
22.7
Black
X
–
700L
ESD-SR-160G
20.2Maximum
20.0
39.0Maximum
≤9.0
22.7
Gray
X
–
700L
ESD-SR-250
31.5Maximum
31.6
38.0Maximum
≤13.0
59.5
Black
X
–
700L
ESD-SR-250G
31.5Maximum
31.6
38.0Maximum
≤13.0
59.5
Gray
X
–
700L
ESD-SR-S16
23.0Maximum
20.0
20.5Maximum
≤8.0
12.9
Black
X
–
700L
ESD-SR-S25
33.0Maximum
29.0
15.5Maximum
≤14.5
21.3
Black
X
–
700L
ESD-SR-S10M
15.5Maximum
14.0
18.5Maximum
≤6.0
4.1
Beige
X
5H
–
ESD-SR-S38M
44.0 ±1.0
-
16.5 ±1.0
18.0
58.0
Black
X
5H
–
ESD-SR-S47M
53.0 ±1.0
-
19.0 ±1.0
26.0
89.0
Black
X
5H
–
ESD-SR-S57M
64.0 ±1.0
-
24.0 ±1.0
35.0
159.0
Black
X
5H
–
1 Frequency range is for reference only. Please test with actual device before use.
6© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
Impedance vs. Frequency
7© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
Impedance vs. Frequency cont.
8© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
Impedance vs. Frequency cont.
9© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
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
Tray
900
ESD-SR-100G
ESD-SR-110
ESD-SR-110G
ESD-SR-S10 800
ESD-SR-120 700
ESD-SR-120G
ESD-SR-150
400
ESD-SR-150G
ESD-SR-160
ESD-SR-160G
ESD-SR-250 60
ESD-SR-250G
ESD-SR-S16 280
ESD-SR-S25 200
ESD-SR-S10M 800
ESD-SR-S38M 72
ESD-SR-S47M
ESD-SR-S57M 36
Handling Precautions
EMICoresshouldbestoredinnormalworkingenvironments.WhiletheEMICoresthemselvesarequiterobustinother
environments,avoidexposuretohightemperatures,highhumidity,corrosiveatmospheresandlongtermstorageforcase,
snap-on and split types.
KEMETrecommendsthatmaximumstoragetemperaturenotexceed40°Candmaximumstoragehumiditynotexceed75%
relativehumidity.Atmospheresshouldbefreeofchlorine,sulfurandalkalibearingcompounds.Avoidalsostoragenear
strongmagneticeldsasthismightmagnetizetheproduct.
Temperatureuctuationsshouldbeminimizedtoavoidcondensationorcracksontheparts.Mechanicalshockscanbring
to cracks as well.
Export Control
For customers in Japan
Forproductsthatarecontrolleditemssubjecttothe“ForeignExchangeandForeignTradeLaw”ofJapan,theexportlicense
speciedbythelawisrequiredforexport.
For customers outside Japan
EMICoreproductsshouldnotbeusedorsoldforuseinthedevelopment,production,stockpilingorutilizationofany
conventionalweaponsormass-destructiveweapons(nuclearweapons,chemicalorbiologicalweapons,ormissiles),orany
other weapons.
10© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard E5005_ESD-SR • 3/31/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
EMI Core – ESD-SR Snap-on Cores for Round Cables for Low & High Frequency (with case)
KEMET Electronics Corporation Sales Offi ces
Foracompletelistofourglobalsalesoces,pleasevisitwww.kemet.com/sales.
Disclaimer
Allproductspecications,statements,informationanddata(collectively,the“Information”)inthisdatasheetaresubjecttochange.Thecustomerisresponsiblefor
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applications,butarenotintendedtoconstitute–andKEMETspecicallydisclaims–anywarrantyconcerningsuitabilityforaspeciccustomerapplicationoruse.
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technicaladviceinferredfromthisInformationorotherwiseprovidedbyKEMETwithreferencetotheuseofKEMET’sproductsisgivengratis,andKEMETassumesno
obligationorliabilityfortheadvicegivenorresultsobtained.
AlthoughKEMETdesignsandmanufacturesitsproductstothemoststringentqualityandsafetystandards,giventhecurrentstateoftheart,isolatedcomponent
failuresmaystilloccur.Accordingly,customerapplicationswhichrequireahighdegreeofreliabilityorsafetyshouldemploysuitabledesignsorothersafeguards
(suchasinstallationofprotectivecircuitryorredundancies)inordertoensurethatthefailureofanelectricalcomponentdoesnotresultinariskofpersonalinjuryor
propertydamage.
Althoughallproduct–relatedwarnings,cautionsandnotesmustbeobserved,thecustomershouldnotassumethatallsafetymeasuresareindictedorthatother
measuresmaynotberequired.
WhenprovidingKEMETproductsandtechnologiescontainedhereintoothercountries,thecustomermustabidebytheproceduresandprovisionsstipulatedinall
applicableexportlawsandregulations,includingwithoutlimitationtheInternationalTracinArmsRegulations(ITAR),theUSExportAdministrationRegulations
(EAR)andtheJapanForeignExchangeandForeignTradeAct.
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