Pulse Withstanding Fusible
Flameproof Metal Film Resistors
EMC Series
UL1412 recognised*
Failsafe 240V mains fusing
Good pulse handling capability
Smallsizeforpowerrang
UL94-V0ameproofprotecon
SurfacemountZI-formopon
*Values22Randabove.ULlenumberE234469
Dimensions (mm) & Weight (g)
Type L max D max f min d nom
PCB
mount
centres
Min bend
radius Wt. nom
EMC2 10 4 27 0.8 18.4 1.2 0.55
Physical Data
Lf
D
d
EMC2
Powerrangat70°C Was 2
Resistance range Ohms 4R7–68R
TCR(25to75°C) ppm/°C 100
IsolaonVoltage Volts 500
Resistance Tolerance % 10, 20
Standard Values E12
Thermal Impedance °C/Wa 82
Ambient temperature range °C -55 to +155
ElectricalData
Construcon
Themetallmisdepositedontoahighpurityceramicrod.Endcapsareforceedandterminaonwiresarewelded
totheendcaps.Finally,acementproteconisappliedtotheresistorbodypriortomarkingwithindelibleink.Thecementprotecon
isappliedinamannerthatleavestheterminaonscompletelyclear.Thispermitsawell-denedbodylength(cleanleadtocleanlead
dimension L).
Terminaons
Material: Solder-coated copper wire
Strength:TheterminaonsmeettherequirementsofIEC68.2.21
Solderability:TheterminaonsmeettherequirementsofIEC115-1Clause4.17.3.2
Solvent Resistance
Thebodyproteconandmarkingareresistanttoallnormalindustrialcleaningsolventssuitableforprintedcircuits.
Resistors
AllpartsarePb-freeandcomplywithEUDirecve2011/65/EU(RoHS2)
06.16
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
http://www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
Single Rectangular Pulse
1
10
100
1000
10000
0.01 0.11 10 100 1000 10000
Pulse Duration (ms)
Pk Power(W)
Single Rectangular Pulse
1
10
100
1000
10000
0.01 0.11 10 100 1000 10000
Pulse Duration (ms)
Pk Power(W)
Single Rectangular Pulse
1
10
100
1000
10000
0.01 0.11 10 100 1000 10000
Pulse Duration (ms)
Pk Power(W)
IEC61000-4-5 1.2/50 s Pulse
0
100
200
300
400
500
600
700
010203040506070
Value(Ohms)
Pk Voltage(V)
IEC61000-4-5 1.2/50 s Pulse
0
100
200
300
400
500
600
700
010203040506070
Value(Ohms)
Pk Voltage(V)
IEC61000-4-5 1.2/50 s Pulse
0
100
200
300
400
500
600
700
010203040506070
Value(Ohms)
Pk Voltage(V)
Pulse Withstanding Fusible
Flameproof Metal Film Resistors
EMC Series
Flammability
TheresistorcoangisUL94-V0ratedandwillnotburnoremitincandescentparclesunderanycondionofapplied
temperature or power overload.
Marking
EMCresistorsarecolourcodedwithvebands.Fourofthebandsindicatevalueandtoleranceinaccordancewith
IEC62.Partswith20%tolerancehavenofourthband.Ahyellowbanddenotesconstantvoltagefusibility.
Maximum
LoadatRatedPower:1000hrs@70°C ΔR% 5
Shelf life: 12 months at room temperature ΔR% 2
Derangfromratedpowerat70°C Zeroat155°C
Climac ΔR% 3
ClimacCategory 50/155/56
Temperature rapid change ΔR% 0.5
Resistance to solder heat ΔR% 0.5
Performance Data
Pulse Performance
Fusing Performance
EMCresistorsfuseopencircuitatoverloadpowers
exceeding60WwithinthemeindicatedontheFusing
Characterisc.Theirfusingperformanceatloweroverload
powersisnotspecied.
EMCresistorsfusesafelyintheeventofa115Vrms/
240Vrmsoverload(line/mainsshortcircuitcondion)
withoutburningoremingincandescentparcles.
Aerfusing,theresistanceisatleast100mesgreater
than the original nominal value.
Fusing Characteristic
(Constant Voltage)
Initial Power (W)
Max. Fusing Time (s)
40 50 60 70 80 90 100
0
5
10
15
20
(4R7-8R2)
(10R-68R)
06.16
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
http://www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
Pulse Withstanding Fusible
Flameproof Metal Film Resistors
EMC Series
Applicaon Notes
1.Iftheresistorsaretodissipatefullratedpower,itisrecommendedthattheterminaonsshouldnotbesolderedcloserthan4mm
from the body.
2.DuetooperangtemperaturelimitsimposedbysomePCBmaterials,derangmaybenecessary.Anesmateofthetemperaturerise
tobeexpectedcanbecalculatedusingthethermalimpedanceguresgivenunderElectricalData.
3.Toprotectagainstreunderallcondionsofoverload,aposiveclearanceofatleast13mmshouldbeprovidedbetweenthebodyof
theresistorandanycombusblematerials.
4.EMCresistorscanalsobesuppliedloosepackedwithradial,goalpostorlancetpre-formedleads,tapepackedwithradialpre-formed
leads,orinZI-formSMDformatpackedinblistertape-seehp://www.electronics.com/themes/electronics/datasheets/resistors/
ZI-form.pdf
Packaging
OurstandardpackagingforEMCistapedandboxed.ThecricaldimensionsareshowninFigure1.Thecomponentwireswillnot
protrudebeyondtheoutsideedgeofthetapes.Alternavepackagingisavailablebyrequest.
mm EMC2
b68
Ordering Procedure
Specifytypereference,valueandtoleranceasshowninthisexampleofEMC2at33Ω,20%:
StandardQuanesPerPackage
Type
EMC2- 33R M I
Value(useIEC62code)
Tolerance(useIEC62code)
Packing
I Ammo EMC2 2000/box Standard
Type EMC2
AmmoPack 2000
K 10%
M 20%
b
f1f2
66
5
Body location f1 – f2 1.4 mm
Figure 1
06.16
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
http://www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
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EMC2-10R0K EMC2-12R0K EMC2-15R0K EMC2-18R0K EMC2-22R0K EMC2-27R0K EMC2-33R0K EMC2-
39R0K EMC2-47R0K EMC2-4R7K EMC2-56R0K EMC2-5R6K EMC2-68R0K EMC2-6R8K EMC2-8R2K EMC2-
15R0KI EMC2-68R0KI EMC2-47R0KI EMC2-27RKI EMC2-56R0KI