VA1210K401R030_技术文档

Surface Mount Varistors

VA Series Automotive Grade 125°C

Overview

Applications

KEMET's VA series of varistors are transient suppressors

with temperature independent suppression characteristics

enablingꢀprotectionꢀfromꢀ−55°Cꢀtoꢀ+125°C.

Typical applications include almost all-electronic systems

in an automobile, anti-lock brake system, direct ignition

system, airbag control system, wiper motors and air

conditioning systems that are susceptible to damage from

destructive voltage transients.

VA varistors offer excellent transient energy distribution and

requireꢀsigniﬁcantlyꢀlessꢀspaceꢀandꢀpadꢀareaꢀthanꢀsiliconꢀ

TVSꢀdiodes,ꢀofferingꢀgreaterꢀcircuitꢀboardꢀlayoutꢀﬂexibilityꢀ

for the designer.

Beneﬁts

• Surface mount form factor

•ꢀ Operatingꢀambientꢀtemperatureꢀofꢀ−55°Cꢀtoꢀ+125°C

• Supply voltage 12 V, 24 and 42 V

• Operating voltage range of 16 to 56 VDC

• Available case sizes: 0805, 1206, 1210, 1812, 2220

• Near zero inductance for the fastest speed of response to

transient surges

• Broad range of current and energy handling capabilities

• Low clamping voltage – Uc

•ꢀ Non-plasticꢀcoatingꢀguaranteesꢀimprovedꢀﬂammabilityꢀ

rating

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•ꢀ Non-sensitiveꢀtoꢀmildlyꢀactivatedꢀﬂuxes

• Barrier type end terminations solderable with Pb-free

solders according to JEDEC J–STD–020C and IEC

60068–2–58

• RoHS 2 2011/65/EC, REACH compliant

•ꢀ AEC-Q200ꢀqualiﬁedꢀGradeꢀ1

Ordering Information

VA

0805

K

121

R

014

Maximum Continuous

Working Voltage

(Vrms AC)

Chip

Rated Peak Single Pulse

Transient Current (A)

Packaging/

Termination

Series

Tolerances

K = ±10%

Size Code

Varistor

SMDꢀ125°C

Automotive

Multilayer Chip

0805 = 0805

1206 = 1206

1210 = 1210

1812 = 1812

2220 = 2220

121 = 120

201 = 200

401 = 400

801 = 800

122 = 1,200

R = Reel 180 mm/Ni Sn

Barrier Terminations

12 V Power Supply

014 = 14

017 = 17

24 V Power Supply

020 = 20

030 = 30

42 V Power Supply

040 = 40

(First two digits represent

signiﬁcantꢀﬁgures.ꢀThirdꢀdigitꢀ

speciﬁesꢀnumberꢀofꢀzeros.)

One world. One KEMET

V0001_VA • 10/25/2016

1

Surface Mount Varistors

VA Series Automotive Grade 125°C

Dimensions – Millimeters

ꢂꢃ5ꢄꢂꢃ25

ꢀ

t

ꢁ

Size Code

L

W

t_max

0805

1206

1210

1812

2220

2.0±0.25

3.2±0.30

4.7±0.40

5.7±0.50

1.25±0.20

1.60±0.20

2.50±0.25

3.2±0.30

1.0

1.2

1.3

1.4

5.00±0.40

Environmental Compliance

RoHS 2 2011/65/EC, REACH

V0001_VA • 10/25/2016

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Surface Mount Varistors

VA Series Automotive Grade 125°C

Performance Characteristics

Continuous

Units

Value

Steady State Applied Voltage

DC Voltage Range (VDC)

Transient

Load Dump Energy (WLD)

V

16 to 56

J

V

A

1 to 12

Jump Start Capability (5 minutes) (V_jump

)

24.5 to 65

120 to 1200

Peak Single Pulse Surge Current, 8/20 µs Waveform (I_max

)

Single Pulse Surge Energy, 10/1000 µs Waveform (W_max

)

J

°C

0.3 to 10.5

−55ꢀtoꢀ+125

−55ꢀtoꢀ+150

<ꢀ+ꢀ0.05

Operating Ambient Temperature

Storage Temperature Range

ThresholdꢀVoltageꢀTemperatureꢀCoefﬁcient

Response Time

°C

%/°C

ns

< 2

Climatic Category

55/125/56

Qualiﬁcations

Condition to be Satisﬁed

after Testing

Reliability Parameter

Test

Tested According to

CECC 42200, Test 4.20 or IEC 1051–1, Test 4.20.

AEC–Q200 Test 8 – 1,000 hours at UCT

AC/DC Bias Reliability

AC/DC Life Test

|δ_Vn(1 mA)| < 10 %

CECC 42200, Test C 2.1 or IEC 1051–1, Test 4.5.

10 pulses in the same direction at 2 pulses per minute

at maximum peak current for 10 pulses

|δ_Vn(1 mA)| < 10 %

no visible damage

Pulse Current Capability

Pulse Energy Capability

I_max8/20 µs

CECC 42200, Test C 2.1 or IEC 1051–1, Test 4.5. 10

pulses in the same direction at 1 pulses every 2

minutes at maximum peak current for 10 pulses

|δ_Vn(1 mA)| < 10 %

no visible damage

W

_max10/1,000 µs

|δ_Vn(1 mA)| < 15 %

no visible damage

|δ_Vn(1 mA)| < 15 %

no visible damage

ISO 7637, Test pulse 5, 10 pulses at rate 1 per minute

WLD Capability

V_jumpCapability

WLD x 10

IncreaseꢀofꢀsupplyꢀvoltageꢀtoꢀVꢀ≥ꢀV_jumpfor 1 minute

V_jump5 min

V0001_VA • 10/25/2016

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Surface Mount Varistors

VA Series Automotive Grade 125°C

Qualiﬁcations cont'd

Condition to be Satisﬁed

after Testing

Reliability Parameter

Test

Tested According to

CECC 42200, Test 4.16 or IEC 1051–1, Test 4.17.

a) Dry heat, 16 hours, UCT, Test Ba, IEC 68–2–2

b)ꢀDampꢀheat,ꢀcyclic,ꢀtheꢀﬁrstꢀcycle:ꢀ55°C,ꢀ93ꢀ%ꢀRH,ꢀ

24 hours, Test Db 68–2–4

Climatic Sequence

|δ_Vn(1 mA)| < 10 %

c) Cold, LCT, 2 hours Test Aa IEC 68–2–1

d)ꢀDampꢀheatꢀcyclic,ꢀremainingꢀ5ꢀcycles:ꢀ55°C,ꢀ93ꢀ%ꢀ

RH, 24 hour/cycle, Test Bd, IEC 68–2–30

Environmental and

Storage Reliability

|δ_Vn(1 mA)| < 10 %

no visible damage

CECC 42200, Test 4.12, Test Na, IEC 68–2–14,

AEC–Q200 Test 16, 5 cycles UCT/LCT, 30 minutes

Thermal Shock

CECC 42200, Test 4.17, Test Ca, IEC 68–2–3,

AEC–Q200ꢀTestꢀ6,ꢀ56ꢀdays,ꢀ40°C,ꢀ93%ꢀRH.ꢀAEC–Q200ꢀ

Test7: Bias, Rh, T all at 85.

Steady State Damp Heat

Storage Test

|δ_Vn(1 mA)| < 10 %

|δ_Vn(1 mA)| < 5 %

IEC 68–2–2, Test Ba, AEC–Q200 Test 3,

1,000 hours at maximum storage temperature

CECC 42200, Test 4.10.1, Test Ta IEC 68–2–20

solderꢀbathꢀandꢀreﬂowꢀmethod

Solderable at shipment

and after 2 year of storage,

criteria > 95% must be

coveredꢀbyꢀsolderꢀforꢀreﬂowꢀ

meniscus

Solderability

Resistance to Soldering

Heat

CECC 42200, Test 4.10.2, Test Tb, IEC 68–2–20 solder

bathꢀandꢀreﬂowꢀmethod

|δ_Vn(1 mA)| < 5 %

JIS–C–6429, App. 1, 18N for 60 seconds – same for

AEC–Q200 Test 22

Terminal Strength

Board Flex

no visual damage

|δ_Vn(1 mA)| < 2 %

no visible damage

JIS–C–6429, App. 2, 2 mm minimum

AEC–Q200ꢀtestꢀ21ꢀ–ꢀBoardꢀﬂex:ꢀ2ꢀmmꢀﬂexꢀminimum

CECC 42200, Test 4.15, Test Fc, IEC 68–2–6, AEC–

Q200 Test 14.

Mechanical Reliability

Frequency range 10 to 55 Hz (AEC: 10 – 2,000 Hz)

Amplitude 0.75 m/s2 or 98 m/s2 (AEC: 5 g's for 20

minutes)

|δ_Vn(1 mA)| < 10 %

no visible damage

Vibration

Total duration 6 hours (3x2h) (AEC: 12 cycles each of

3 directions)

Waveshape – half sine

CECC 42200, Test 4.14, Test Ea, IEC 68–2–27,

AEC–Q200 Test 13.

Acceleration = 490 m/s2 (AEC: MIL-STD–202–Method

213),

|δ_Vn(1 mA)| < 10 %

no visible damage

Mechanical Shock

ISO–7637–1 Pulses

Pulse duration = 11 ms,

Waveshape – half sine; Number of shocks = 3x6

|δ_Vn(1 mA)| < 10 %

no visible damage

Electrical Transient

Conduction

AEC–Q200 Test 30: Test pulses 1 to 3.

Also other pulses – freestyle.

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Surface Mount Varistors

VA Series Automotive Grade 125°C

Reliability

In general, reliability is the ability of a component to perform and maintain its functions in routine circumstances, as well as

hostile or unexpected circumstances. The mean life of series components is a function of:

• Factor of Applied Voltage

• Ambient temperature

Mean life is closely related to Failure rate (formula).

Mean life (ML) is the arithmetic mean (average) time to failure of a component.

Failure rate is the frequency with which an engineered system or component fails, expressed for example in failures per

hour. Failure rate is usually time dependent, an intuitive corollary is that the rate changes over time versus the expected

life cycle of a system.

ꢀeꢁn Liꢂe ꢃn Arrꢄeniꢅꢆ ꢇꢃꢈeꢉ

1ꢂ^ꢇ

ꢈ

1ꢂ^ꢆ

Failure rate formula – calculation

10⁹

ꢀears

1ꢁꢂꢂꢂ

Λ=

[ﬁt]

ML[h]

FAV – Factor of Applied Voltage

1ꢂ^ꢅ

1ꢂ⁵

1ꢂ^ꢄ

1ꢂ^ꢃ

1ꢂꢂ

Vapl

Λ=

ꢍAV

ꢂꢁꢆ

V_max

1ꢂ

1

ꢂꢁꢇ

Vapl = applied voltage

V_max= maximum operating voltage

ꢂꢁꢎ

1ꢁꢂ

12ꢂ 1ꢂꢂ ꢇꢂ ꢅꢂ

ꢄꢂ

2ꢂ °C

ꢀa

V0001_VA • 10/25/2016

5

Surface Mount Varistors

VA Series Automotive Grade 125°C

Table 1 – Ratings & Part Number Reference

V_nV_jump

V_rmsVDC 1 mA 5 min.

I_c

I_max

W_max

WLD

P

C_typ

KEMET Part

Number

L

W

t_max

V_c

8/20 µs 8/20 µs 10/1000 µs 10 x max at 1 kHz

(mm) (mm) (mm)

V

(V)

(A)

(J)

(J) (J)

(nF)

12 V Power Supply

VA0805K121R014

VA1206K201R014

VA1210K401R014

VA1812K801R014

VA2220K122R014

VA0805K121R017

VA1206K201R017

VA1210K401R017

VA1812K801R017

VA2220K122R017

2.0 ±0.25 1.25 ±0.20

3.2 ±0.30 1.60 ±0.20

3.2 ±0.30 2.50 ±0.25

4.7 ±0.40 3.2 ±0.30

5.7 ±0.50 5.00 ±0.40

2.0 ±0.25 1.25 ±0.20

3.2 ±0.30 1.60 ±0.20

3.2 ±0.30 2.50 ±0.25

4.7 ±0.40 3.2 ±0.30

5.7 ±0.50 5.00 ±0.40

1.0

1.2

1.3

1.4

1.0

1.2

1.3

1.4

14

17

16

20

24

27

24.5

30.0

40

44

1

120

200

400

800

1200

120

0.3

0.6

1.6

2.4

5.8

0.5

1.1

1.8

2.9

7.2

1.0

1.5

0.008

0.010

0.015

0.030

0.008

0.010

0.015

0.030

0.44

1.00

2.35

4.50

10.00

0.37

0.81

2.00

3.80

8.00

2.5

5

3.0

6.0

12.0

1.0

10

1

200

400

800

1200

1.5

2.5

5

3.0

6.0

12.0

10

24 V Power Supply

VA1206K201R020

VA1210K401R020

VA1812K801R020

VA2220K122R020

VA1206K201R030

VA1210K401R030

VA1812K801R030

VA2220K122R030

3.2 ±0.30 1.60 ±0.20

3.2 ±0.30 2.50 ±0.25

4.7 ±0.40 3.2 ±0.30

5.7 ±0.50 5.00 ±0.40

3.2 ±0.30 1.60 ±0.20

3.2 ±0.30 2.50 ±0.25

4.7 ±0.40 3.2 ±0.30

5.7 ±0.50 5.00 ±0.40

1.2

1.3

1.4

1.2

1.3

1.4

20

30

26

34

33

47

30.0

50.0

54

77

1

2.5

5

200

400

800

1200

200

400

800

1200

1.6

1.9

1.5

3.0

0.008

0.010

0.015

0.030

0.008

0.010

0.015

0.030

0.78

1.65

3.30

7.00

0.53

1.10

2.20

6.50

3.0

8.0

2.0

2.3

3.8

10.0

6.0

10

1

12.0

1.5

2.5

5

3.0

6.0

10

12.0

42 V Power Supply

VA1206K201R040

VA1210K401R040

VA1812K801R040

VA2220K122R040

3.2 ±0.30 1.60 ±0.20

3.2 ±0.30 2.50 ±0.25

4.7 ±0.40 3.2 ±0.30

5.7 ±0.50 5.00 ±0.40

1.2

1.3

1.4

40

56

68

65.0

110

1

2.5

5

200

400

2.2

2.6

1.5

3.0

0.008

0.010

0.015

0.030

0.40

0.90

1.80

5.50

800

4.8

6.0

10

1200

10.5

12.0

V0001_VA • 10/25/2016

6

Surface Mount Varistors

VA Series Automotive Grade 125°C

Soldering

PopularꢀsolderingꢀtechniquesꢀusedꢀforꢀsurfaceꢀmountedꢀcomponentsꢀareꢀWaveꢀandꢀInfraredꢀReﬂowꢀprocesses.ꢀBothꢀprocessesꢀcanꢀbeꢀ

performed with Pb-containing or Pb-free solders. The termination option available for these soldering techniques is Barrier Type End

Terminations.

Recommended and

Suitable for

Component RoHS

Compliant

End Termination

Designation

Ni Sn Barrier Type End

Termination

Ni R1

Pb-containing and

Pb-free soldering

Yes

Wave Soldering – this process is generally associated with discrete components mounted on the underside of printed circuit boards, or

for large top-side components with bottom-side mounting tabs to be attached, such as the frames of transformers, relays, connectors,

etc.ꢀSMDꢀvaristorsꢀtoꢀbeꢀwaveꢀsolderedꢀareꢀﬁrstꢀgluedꢀtoꢀtheꢀcircuitꢀboard,ꢀusuallyꢀwithꢀanꢀepoxyꢀadhesive.ꢀWhenꢀallꢀcomponentsꢀonꢀtheꢀ

PCB have been positioned and an appropriate time is allowed for adhesive curing, the completed assembly is then placed on a conveyor

and run through a single, double wave process.

Infrared Reﬂow Solderingꢀ–ꢀtheseꢀreﬂowꢀprocessesꢀareꢀtypicallyꢀassociatedꢀwithꢀtop-sideꢀcomponentꢀplacement.ꢀThisꢀtechniqueꢀutilizesꢀ

aꢀmixtureꢀofꢀadhesiveꢀandꢀsolderꢀcompoundsꢀ(andꢀsometimesꢀﬂuxes)ꢀthatꢀareꢀblendedꢀintoꢀaꢀpaste.ꢀTheꢀpasteꢀisꢀthenꢀscreenedꢀontoꢀPCBꢀ

solderingꢀpadsꢀspeciﬁcallyꢀdesignedꢀtoꢀacceptꢀaꢀparticularꢀsizedꢀSMDꢀcomponent.ꢀTheꢀrecommendedꢀsolderꢀpasteꢀwetꢀlayerꢀthicknessꢀ

isꢀ100ꢀtoꢀ300ꢀµm.ꢀOnceꢀtheꢀcircuitꢀboardꢀisꢀfullyꢀpopulatedꢀwithꢀMDꢀcomponents,ꢀitꢀisꢀplacedꢀinꢀaꢀreﬂowꢀenvironment,ꢀwhereꢀtheꢀpasteꢀisꢀ

heatedꢀtoꢀslightlyꢀaboveꢀitsꢀeutecticꢀtemperature.ꢀWhenꢀtheꢀsolderꢀpasteꢀreﬂows,ꢀtheꢀSMDꢀcomponentsꢀareꢀattachedꢀtoꢀtheꢀsolderꢀpads.

Solder Fluxesꢀ–ꢀsolderꢀﬂuxesꢀareꢀgenerallyꢀappliedꢀtoꢀpopulatedꢀcircuitꢀboardsꢀtoꢀcleanꢀoxidesꢀformingꢀduringꢀtheꢀheatingꢀprocessꢀandꢀtoꢀ

facilitateꢀtheꢀﬂowingꢀofꢀtheꢀsolder.ꢀSolderꢀﬂuxesꢀcanꢀbeꢀeitherꢀaꢀpartꢀofꢀtheꢀsolderꢀpasteꢀcompoundꢀorꢀcanꢀbeꢀseparateꢀmaterials,ꢀusuallyꢀ

ﬂuids.ꢀRecommendedꢀﬂuxesꢀare:

ꢀ

•ꢀnon-activatedꢀ(R)ꢀﬂuxes,ꢀwheneverꢀpossibleꢀ

•ꢀmildlyꢀactivatedꢀ(RMA)ꢀﬂuxesꢀofꢀclassꢀL3CN

• class ORLO

Activated (RA),ꢀwaterꢀsolubleꢀorꢀstrongꢀacidicꢀﬂuxesꢀwithꢀaꢀchlorineꢀcontentꢀ>ꢀ0.2ꢀwt.ꢀ%ꢀareꢀNOTꢀRECOMMENDED.ꢀTheꢀuseꢀofꢀsuchꢀﬂuxesꢀ

could create high leakage current paths along the body of the varistor components.

Whenꢀaꢀﬂuxꢀisꢀappliedꢀpriorꢀtoꢀwaveꢀsoldering,ꢀitꢀisꢀimportantꢀtoꢀcompletelyꢀdryꢀanyꢀresidualꢀﬂuxꢀsolventsꢀpriorꢀtoꢀtheꢀsolderingꢀprocess.

Thermal Shock – to avoid the possibility of generating stresses in the varistor chip due to thermal shock, a preheat stage to within 100

°Cꢀofꢀtheꢀpeakꢀsolderingꢀprocessꢀtemperatureꢀisꢀrecommended.ꢀAdditionally,ꢀSMDꢀvaristorsꢀshouldꢀnotꢀbeꢀsubjectedꢀtoꢀaꢀtemperatureꢀ

gradientꢀgreaterꢀthanꢀ4ꢀ°C/sec.,ꢀwithꢀanꢀidealꢀgradientꢀbeingꢀ2ꢀ°C/sec.ꢀPeakꢀtemperaturesꢀshouldꢀbeꢀcontrolled.ꢀWaveꢀandꢀReﬂowꢀ

solderingꢀconditionsꢀforꢀSMDꢀvaristorsꢀwithꢀPb-containingꢀsoldersꢀareꢀshownꢀinꢀFig.ꢀ1ꢀandꢀ2ꢀrespectively,ꢀwhileꢀWaveꢀandꢀReﬂowꢀsolderingꢀ

conditions for SMD varistors with Pb-free solders are shown in Fig, 1 and 3

V0001_VA • 10/25/2016

7

Surface Mount Varistors

VA Series Automotive Grade 125°C

Soldering cont'd

WheneverꢀseveralꢀdifferentꢀtypesꢀofꢀSMDꢀcomponentsꢀareꢀbeingꢀsoldered,ꢀeachꢀhavingꢀaꢀspeciﬁcꢀsolderingꢀproﬁle,ꢀtheꢀsolderingꢀproﬁleꢀ

with the least heat and the minimum amount of heating time is recommended. Once soldering has been completed, it is necessary to

minimizeꢀtheꢀpossibilityꢀofꢀthermalꢀshockꢀbyꢀallowingꢀtheꢀhotꢀPCBꢀtoꢀcoolꢀtoꢀlessꢀthanꢀ50ꢀ°Cꢀbeforeꢀcleaning.

Inspection Criteriaꢀ–ꢀtheꢀinspectionꢀcriteriaꢀtoꢀdetermineꢀacceptableꢀsolderꢀjoints,ꢀwhenꢀWaveꢀorꢀInfraredꢀReﬂowꢀprocessesꢀareꢀused,ꢀwillꢀ

dependꢀonꢀseveralꢀkeyꢀvariables,ꢀprincipallyꢀterminationꢀmaterialꢀprocessꢀproﬁles.

Pb-contining Wave and IR Reﬂow Soldering – typical “before” and “after” soldering results for Barrier Type End Terminations can be seen

in Fig. 4. Barrier type terminated varistors form a reliable electrical contact and metallurgical bond between the end terminations and the

solder pads. The bond between these two metallic surfaces is exceptionally strong and has been tested by both vertical pull and lateral

(horizontal) push tests. The results exceed established industry standards for adhesion.

The solder joint appearance of a barrier type terminated varistor shows that solder forms a metallurgical junction with the thin tin-alloy

(over the barrier layer), and due to its small volume “climbs” the outer surface of the terminations, the meniscus will be slightly lower.

This optical appearance should be taken into consideration when programming visual inspection of the PCB after soldering.

Ni Sn Barrier Type End Terminations

Fig.ꢀ4ꢀ–ꢀSolderingꢀCriterionꢀinꢀcaseꢀofꢀWaveꢀandꢀIRꢀReﬂowꢀPb-containingꢀSoldering

Pb-free Wave and IR Reﬂow Soldering – typical “before” and “after” soldering results for Barrier Type End Terminations are given

in a phenomenon knows as “mirror” or “negative” meniscus. Solder forms a metallurgical junction with the entire volume of the end

termination, i.e. it diffuses from pad to end termination across the inner side, forming a “mirror” or “negative” meniscus. The height of the

solder penetration can be clearly seen on the end termination and is always 30% higher than the chip height.

V0001_VA • 10/25/2016

8

Surface Mount Varistors

VA Series Automotive Grade 125°C

Soldering cont'd

Solder Test and Retained Samplesꢀ–ꢀreﬂowꢀsolderingꢀtestꢀbasedꢀonꢀJ-STD-020D.1ꢀandꢀsolderingꢀtestꢀbyꢀdippingꢀbasedꢀonꢀIECꢀ60068-

2 for Pb-free solders are preformed on each production lot as shown in the following chart. Test results and accompanying samples

areꢀretainedꢀforꢀaꢀminimumꢀofꢀtwoꢀ(2)ꢀyears.ꢀTheꢀsolderabilityꢀofꢀaꢀspeciﬁcꢀlotꢀcanꢀbeꢀcheckedꢀatꢀanyꢀtimeꢀwithinꢀthisꢀperiodꢀshouldꢀaꢀ

customer require this information.

Static leaching

(Simulation of Reﬂow (Simulation of Wave

Dynamic Leaching

Test

Resistance to Flux

Solderability

Soldering)

Parameter

Soldering method

Flux

dipping

L3CN, ORL0

dipping

dipping with agitation

L3CN, ORL0, R

Pb Solder

62Sn/36Pb/2 Ag

235±5

PbꢀSolderingꢀtemperatureꢀ(°C)

Pb-FREE Solder

235±5

260±5

235±5

Sn96/Cu0,4–0,8/3–4Ag

250±5

Pb-FREE Soldering

250±5

210

280±5

10

250±5

> 15

Temperatureꢀ(°C)

Soldering Time (s)

Burn-in Conditions

Acceptance Criterion

2

VDC_max, 48 h

dVn < 5 %, i_dcmust stay

unchanged

> 95 % of end termination

must be covered by solder must be intact and covered must be intact and covered

by solder by solder

> 95 % of end termination

Rework Criteria Soldering Iron – unless absolutely necessary, the use of soldering irons is NOT recommended for reworking varistor

chips. If no other means of rework is available, the following criteria must be strictly followed:

• Do not allow the tip of the iron to directly contact the top of the chip

•ꢀDoꢀnotꢀexceedꢀtheꢀfollowingꢀsolderingꢀironꢀspeciﬁcations:

Output Power:

TemperatureꢀofꢀSolderingꢀIronꢀTip:ꢀꢀ

Soldering Time:

30 Watts maximum

280°Cꢀmaximum

10 Seconds maximum

ꢀ

Storage Conditions – SMD varistors should be used within 1 year of purchase to avoid possible soldering problems caused by oxidized

terminals.ꢀTheꢀstorageꢀenvironmentꢀshouldꢀbeꢀcontrolled,ꢀwithꢀhumidityꢀlessꢀthanꢀ40%ꢀandꢀtemperatureꢀbetweenꢀ-25ꢀandꢀ45ꢀ°C.ꢀVaristorꢀ

chips should always be stored in their original packaged unit.

V0001_VA • 10/25/2016

9

Surface Mount Varistors

VA Series Automotive Grade 125°C

Soldering Pad Conﬁguration

M

ꢂ

C

ꢃ

ꢂ

ꢀ

A

t

ꢁ

Size

0805

1206

1210

1812

2220

L (mm)

2.0 ±0.25

3.2 ±0.30

4.7 ±0.40

5.7 ±0.50

W (mm)

1.25 ±0.20

1.60 ±0.20

2.50 ±0.25

3.20 ±0.30

5.00 ±0.40

h (mm)

t_max(mm)

A (mm)

1.4

B (mm)

1.2

C (mm)

1.0

D (mm)

3.4

0.5 ±0.25

1.1

1.6

1.8

1.9

1.8

1.2

2.1

4.5

2.8

1.2

2.1

4.5

3.6

1.5

3.2

6.2

5.5

1.5

4.2

7.2

Packaging

Chip Size

Voltage

Range (V)

0805

1206

1210

Reel Size

180

1812

2220

180

14

17

3500

2500

1000

2500

20 to 40

2500

V0001_VA • 10/25/2016 10

Surface Mount Varistors

VA Series Automotive Grade 125°C

Construction

ꢀeꢁꢂiꢃeꢄ ꢅrꢆꢇꢇ ꢈecꢁiꢆn

Gꢀass ꢁassivation

ꢇermination

ꢄAꢅꢌꢁdꢍ ꢎiꢌSnꢆ

Gꢀass ꢁassivation

ꢈnꢉ ꢊaꢋer

ꢂnner ꢃꢀectrodes

ꢄAꢅꢆ

ꢇermination

ꢄAꢅꢌꢁdꢍ ꢎiꢌSnꢆ

ꢇerminate

ꢃdꢅe

ꢂnner ꢃꢀectrodes

ꢄAꢅꢆ

ꢇerminate

ꢃdꢅe

V0001_VA • 10/25/2016 11

Surface Mount Varistors

VA Series Automotive Grade 125°C

Taping & Reel Speciﬁcations

8 mm

1206

1.9

12 mm

Tape Size (mm)

0805

1210

2.9

1812

3.75

5

2220

5.6

Ao

1.6

2.4

Bo

3.75

1.8

3.7

6.25

2

Ko Maximum

1.1

2

B₁Maximum

4.35

0.3

4.35

0.3

4.35

0.3

8.2

D₁Minimum

1.5

E₂Minimum

6.25

4

6.25

4

6.25

4

10.25

8

10.25

8

P₁

F

3.5

5.5

W

8.0

12.0

6.5

12.0

6.5

T₂Maximum

3.5

W₁

8.4ꢀ+ꢀ1.5

14.4

7.9...10.9

180

8.4ꢀ+ꢀ1.5

14.4

7.9...10.9

180

8.4ꢀ+ꢀ1.5

14.4

7.9...10.9

180

12.4ꢀ+ꢀ2

18.4

11.9...15.4

180

12.4ꢀ+ꢀ2

18.4

11.9...15.4

180

W₂Maximum

W₃

A

V0001_VA • 10/25/2016 12

Surface Mount Varistors

VA Series Automotive Grade 125°C

Terms and Deﬁnitions

Term

Symbol

Deﬁnition

Rated AC

Voltage

Rated DC

Voltage

Maximum continuous sinusoidal AC voltage (<5% total harmonic distortion) which may be

appliedꢀtoꢀtheꢀcomponentꢀunderꢀcontinuousꢀoperationꢀconditionsꢀatꢀ25°C

Maximum continuous DC voltage (<5% ripple) which may be applied to the component under

V_rms

V_dc

V

continuousꢀoperatingꢀconditionsꢀatꢀ25°C

Supply

Voltage

The voltage by which the system is designated and to which certain operating characteristics of

the system are referred; V_rms= 1,1 x V

TheꢀcurrentꢀpassingꢀthroughꢀtheꢀvaristorꢀatꢀVdcꢀandꢀatꢀ25°Cꢀorꢀatꢀanyꢀotherꢀspeciﬁed

temperature

Leakage Current

Varistor Voltage

I_dc

V_n

I_n

Voltage across the varistor measured at a given reference current In

Reference Current

Clamping Voltage

Protection Level

Reference current = 1 mA DC

The peak voltage developed across the varistor under standard atmospheric conditions, when

passingꢀanꢀ8/20ꢀμsꢀclassꢀcurrentꢀpulse

A peak value of current which is 1/10 of the maximum peak current for 100 pulses at two per

minuteꢀforꢀtheꢀ8/20ꢀμsꢀpulse

V_c

I_c

Class Current

Voltage

Clamping

Ratio

Aꢀﬁgureꢀofꢀmeritꢀmeasureꢀofꢀtheꢀvaristorꢀclampingꢀeffectivenessꢀasꢀdeﬁnedꢀbyꢀtheꢀsymbols

V_c/V_app

V_c/V_app, where (V_app= V_rmsor V_dc)

The jump start transient resulting from the temporary application of an overvoltage in excess

of the rated battery voltage. The circuit power supply may be subjected to a temporary

overvoltage condition due to the voltage regulation failing or it may be deliberately generated

when it becomes necessary to boost start the car

Energyꢀwhichꢀmayꢀbeꢀdissipatedꢀforꢀaꢀsingleꢀ10/1000ꢀμsꢀpulseꢀofꢀaꢀmaximumꢀratedꢀcurrent,

with rated AC voltage or rated DC voltage also applied, without causing device failure

Load Dump is a transient which occurs in an automotive environment. It is an exponentially

decaying positive voltage which occurs in the event of a battery disconect while the alternator

is still generating charging current with other loads remaining on the alternator circuit at the

time of battery disconect

Jump

Start

Transient

V_jump

W_max

WLD

Rated Single Pulse

Transient Energy

Load

Dump

Transient

Rated Peak Single

Pulse Transient

Current

Maximumꢀpeakꢀcurrentꢀwhichꢀmayꢀbeꢀappliedꢀforꢀaꢀsingleꢀ8/20ꢀμsꢀpulse,ꢀwith,ꢀratedꢀline

I_max

voltage also applies, without causing device failure

Rated Transient

Average Power

Dissipation

Maximum average power which may be dissipated due to a group of pulses occurring within a

P

speciﬁedꢀisolatedꢀtimeꢀperiod,ꢀwithoutꢀcausingꢀdeviceꢀfailureꢀatꢀ25°C

Capacitance

C

tr

Capacitance between two terminals of the varistor measured at at 1 kHz

Response Time

Varistor Voltage

Temperature

Coefﬁcient

Insulation Resistance

The time lag between application of a surge and varistor's "turn-on" conduction action

TC

IR

(V_nꢀatꢀ85°Cꢀ–ꢀV_nꢀatꢀ25°C)/(V_nꢀatꢀ25°C)ꢀxꢀ60°C)ꢀxꢀ100

Minimum resistance between shorted terminals and varistor surface

Isolation

Voltage

Operating

Temperature

The maximum peak voltage which may be applied under continuous operating conditions

between the varistor terminations and any conducting mounting surface

The range of ambient temperature for which the varistor is designed to operate continuously as

deﬁnedꢀbyꢀtheꢀtemperatureꢀlimitsꢀofꢀitsꢀclimaticꢀcategory

UCT = Upper Category Temperature – the maximum ambient temperature for which a varistor

has been designed to operate continuously, LCT = Lower Category Temperature – the minimum

ambient temperature at which a varistor has been designed to operate continuously

DHD = Dump Heat Test Duration

Climatic Category

LCT/UCT/DHD

Storage Temperature

Storage temperature range without voltage applied

V0001_VA • 10/25/2016 13

Surface Mount Varistors

VA Series Automotive Grade 125°C

KEMET Electronic Corporation Sales Ofﬁces

Forꢀaꢀcompleteꢀlistꢀofꢀourꢀglobalꢀsalesꢀof ꢀces,ꢀpleaseꢀvisitꢀwww.kemet.com/sales.

Disclaimer

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

checking and verifying the extent to which the Information contained in this publication is applicable to an order at the time the order is placed.

All Information given herein is believed to be accurate and reliable, but it is presented without guarantee, warranty, or responsibility of any kind, expressed or implied.

Statements of suitability for certain applications are based on KEMET Electronics Corporation’s (“KEMET”) knowledge of typical operating conditions for such

applications,ꢀbutꢀareꢀnotꢀintendedꢀtoꢀconstituteꢀ–ꢀandꢀKEMETꢀspeci ꢀcallyꢀdisclaimsꢀ–ꢀanyꢀwarrantyꢀconcerningꢀsuitabilityꢀforꢀaꢀspeci ꢀcꢀcustomerꢀapplicationꢀorꢀuse.ꢀ

The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any

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.

KEMET is a registered trademark of KEMET Electronics Corporation.

V0001_VA • 10/25/2016 14


型号：	VA1210K401R030
厂家：	KEMET CORPORATION
描述：	Surface Mount Varistors
文件：	总14页 (文件大小：1125K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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