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44

CERAMIC SURGE ABSORBERS (VARISTORS)

SVC CHARACTERISTIC

TYPE DESIGNATION (HOW TO ORDER)

SVC 471 D-14A FF 7

SVC

SVC series Varistors are gapless ceramic surge absorbers of a new type made of metal oxide which is designed to protectvarious kinds of electronic devices and semiconducting elements from surges.

INTRODUCTION

1. High discharge current capability up to 4000 Amps.2. Excellent clamping characteristics.3. Fast response time under 50 nanesesconds.4. Improve product safety5. UL, CSA, VDE recognized

Basic TypeZnO Varistor

Lead Spacing & Pitch of Component

Packing Style & Lead Variation

ClassificationA : High Voltage(82V and above)B : Low Voltage(less then 68V)

Chip Element Size (Dia)05 : 5mm 14 : 14mm07 : 7mm 20 : 20mm10 : 10mm

Varistor Nominal Voltage(The first two digit indicate significaticant digits)

(The 3rd digit indicate the number of zeros following)

Style

D : Disk Type Varistor

Suffix Code

FEATURES

Code 5 7 8 9 1

Taping Type Lead Spacing(mm) 5.0 7.5 7.5 7.5 10.0

Pitch of Component(mm) 12.7 15.0 30.0 25.4 30.0

Bulk TypeCode 5 7 1

Lead Spacing(mm) 5.0 7.5 10.0

Packing Style

FTaping

Type

Flat Pack

S

K

F

Straight Type

In-Kink Type

Out-Kink Type

B Bulk

S

W

K

L

N

Straight Long Type

Kink short Type

Kink long Type

Kink short Type

Straight short Type

Lead Variation Packing Style Lead Variation

45


V-Ⅰ CURVE

SVC

SVC CHARACTERISTIC CURVES

Small - current region of V - Ⅰ curve

B TYPE

Withstand discharge impulse current characteristics (Typical)

Temporary power frequency over voltage capability

A TYPE

Withstand discharge impulse current characteristics (Typical)

46


SPECIFICATION

SVC

Device

Type

SVC 180D-05BSVC 180D-07BSVC 180D-10BSVC 180D-14BSVC 180D-20B

57101420

11 14

0.30.81.53.510.0

0.010.020.050.10.2

12525050010002000

18 16 20

4036363636

12.551020

170035007000140028000


57101420

14 18

0.40.92.04.013.0

0.010.020.050.10.2

12525050010002000

22 20 24

4843434343

12.551020

1200250050001100022000


57101420

17 22

0.51.02.55.015.0

0.010.020.050.10.2

12525050010002000

27 24 30

6053535453

12.551020

110020004500900018000


57101420

20 26

0.61.23.06.020.0

0.010.020.050.10.2

12525050010002000

33 30 36

7365656565

12.551020

100020004000800016000


57101420

25 31

0.81.53.57.024.0

0.010.020.050.10.2

12525050010002000

39 35 43

8677777777

12.551020

80016003200650013000


57101420

30 38

1.01.84.58.530.0

0.010.020.050.10.2

12525050010002000

47 42 52

10493939393

12.551020

70014002800550011000


57101420

35 45

1.02.25.510.535.0

0.010.020.050.10.2

12525050010002000

56 50 62

123110110110110

12.551020

60013002500500010000


57101420

40 56

1.22.56.512.040.0

0.010.020.050.10.2

12525050010002000

68 61 75

150135135135135

12.551020

5001000200040008000


57101420

50 65

1.73.58.014.027.0

0.10.250.40.61.0

250600125025004000

82 74 90

145135135135135

5102550100

400800150030006000


57101420

60 85

2.04.010.018.030.0

0.10.250.40.61.0

250600125025004000

100 90 110

175165165165165

5102550100

350700150030006000


57101420

75 100

2.55.012.020.040.0

0.10.250.40.61.0

250600125025004000

120 108 132

210200200200200

5102550100

350700130026005200


57101420

95 125

3.06.016.025.050.0

0.10.250.40.61.0

250600125025004000

150 135 165

260250250250250

5102550100

250500100020004000


57101420

130 170

4.010.020.035.070.0

0.10.250.40.61.0

250600125025004000

200 185 225

355340340340340

5102550100

20040080016003200


57101420

140 180

4.510.023.040.075.0

0.10.250.40.61.0

250600125025004000

220 198 242

380360360360360

5102550100

17035070014002800


57101420

150 200

5.010.025.040.080.0

0.10.250.40.61.0

250600125025004000

240 216 264

415395395395395

5102550100

17035070013002600

Chip

Element

Size

Maximum ratings Characteristics

Nominal varistor④

peak voltage

Typical

capacitance

Max. clamping⑤voltage @ test

current(8/20)

Applied voltage

RMS50/60Hz(25)

Averagepower

dissipation

Peak③current(8/20)

DC

(25)Energy②

Transient

Dia(mm)

V acm(Volts)

V dcm(Volts)

W tm(Joules)

Ptam(Watts)

Itm(Amps)

Vnom(Volts)

Tolerance Vc(Volts)

Ip(Amps)

f=1kHz(pF)Min

(Volts)Max

(Volts)

47


SVC

Device

Type

SVC 271D-05ASVC 271D-07ASVC 271D-10ASVC 271D-14ASVC 271D-20A

57101420

175 225

6.012.030.050.090.0

0.10.250.40.61.0

250600

125025004000

270 247 303

475455455455455

5102550

100

150300600

12002400

120250500

10002000

110220450900

1800

100200400800

1600

80170350700

1400

300600

1200270550

1100

250500

1000220450900220440880

210420840

180380750180350700150300600

200400

5102550

100

5102550

100

5102550

100

5102550

100

2550

1002550

100

2550

1002550

1002550

1002550

1002550

1002550

100

2550

10050

100

620595595595595

675650650650650

754710710710710

810775775775775

920920920

102510251025

112011201120124012401240129012901290

135513551355

150015001500165016501650181518151815

29702970

396

429

473

517

616

682

748

825

858

902

1001

1100

1210

1980

324

351

387

423

504

558

612

675

702

738

819

900

990

1620

360

390

430

470

560

620

680

750

780

820

910

1000

1100

1800

250600

125025004000

250600

125025004000

250600

125025004000

250600

125025004000

125025004000125025004000

125025004000125025004000125025004000

125025004000

12502500400012502500400012502500400025004000

0.10.250.40.61.0

0.10.250.40.61.0

0.10.250.40.61.0

0.10.250.40.61.0

0.40.61.0

0.40.61.00.40.61.00.40.61.00.40.61.0

0.40.61.00.40.61.00.40.61.0

0.40.61.00.61.0

7.515.035.065.0

120.0

8.017.040.070.0

130.0

9.020.045.075.0

140.0

10.020.045.080.0

150.0

45.085.0

150.045.085.0

150.045.090.0

160.0

50.0100.0175.050.0

105.0180.0

55.0110.0190.060.0

120.0215.065.0

130.0230.070.0

140.0250.0

24.0400.0

300

320

350

385

460

550

560

615

640

670

745

825

895

1465

230

250

275

300

350

385

420

460

485

510

550

625

680

1000

57101420

57101420

57101420

57101420

101420101420

101420101420

101420

101420101420101420

1014201420





SVC 561D-10ASVC 561D-14ASVC 561D-20A



SVC 751D-10ASVC 751D-14ASVC 751D-20ASVC 781D-10ASVC 781D-14ASVC 781D-20ASVC 821D-10ASVC 821D-14ASVC 821D-20A

SVC 911D-10ASVC 911D-14ASVC 911D-20ASVC 102D-10ASVC 102D-14ASVC 102D-20ASVC 112D-10ASVC 112D-14ASVC 112D-20ASVC 182D-10ASVC 182D-14A

Dia(mm)

Vacm(Volts)

Vdcm(Volts)

Wtm(Joules)

Ptam(Watts)

Itm(Amps)

Vnom(Volts)

ToleranceMin

(Volts)Max

(Volts)

VC(Volts)

Ip(Amps)

f=1kHz(pF)

Notes : ①The waveform of the maximum DC applied voltage is flat. When a ripple

voltage as from a rectifier source is supplied make sure that the peakvoltage is kept under th VdcmAn AC applied voltage(50/60Hz) form a since waveshape.When the distortion in the waveform is extensive make sure that the peak voltage is less than 2times the Vacm.

②Energy : WtmTransient energy ratings are given in the Wtm column of thespecifications in Joules (watt-second).The rating is the maximum allowable energy for a single impulse of 2mssquare-waveform current with continuous voltage applied. Energyratings are based on a shift of Vnom of less than ±10% of initial value.

③Transient peak current (ltm)The peak current rating. ltm. of varistor is based on an 8/20 testimpulse waveshape.

√

This peak current is the maximum peak current in which the nominalvaristor voltage shift does not exceed ±10% when the test impulse isapplied twice at 5 mimutes intervals.

④Nominal varistor voltage : VnomIndicates the varistor terminal voltage measured with a 1mA DC applied.-0.1mA DC in the case of the 0.5A and 05B series.

⑤Maximum clamping voltage : VcIndicates the peak teminal voltage measured with an 8/20 impulsecurrent applied.

Operating ambient temperature : -40 to +80Storage temperature : -40 to +125UL and CSA recognized (UL 1449, UL 497B or UL 1414, CSA)SVC varistors have been tested by Underwiter’s Laboratories, Inc. andCanadian Standards AssociationUL File No. E97754, E151195, E154171.CSA File No. LR78923.

48


SVCDIMENSIONS (Unit : mm)

B TYPE

A TYPE

SVC 180D-05B 4.5 7.5 10.0 25 5.0 0.55SVC 220D-05B 4.5 7.5 10.0 25 5.0 0.55SVC 270D-05B 4.5 7.5 10.0 25 5.0 0.55SVC 330D-05B 4.5 7.5 10.0 25 5.0 0.55

SVC 820D-07ASVC 101D-07ASVC 121D-07ASVC 151D-07A





SVC 361D-10ASVC 391D-10ASVC 431D-10ASVC 561D-10ASVC 621D-10ASVC 681D-10ASVC 751D-10ASVC 781D-10A










4.54.54.54.5

4.54.54.54.5

5.05.06.06.0

4.54.54.54.5

4.54.54.54.5

5.05.06.06.07.57.57.58.58.5

8.510.510.510.5

4.54.54.54.5

4.54.54.54.5

5.05.06.06.07.57.57.58.58.5

8.510.510.510.515.0

4.54.54.54.5

4.54.54.54.5

5.05.06.06.07.57.57.58.58.5

8.510.510.510.015.0

9.09.09.09.0

9.09.09.09.0

9.09.09.09.0

14.014.014.014.0

14.014.014.014.0

14.014.014.014.014.014.014.014.014.0

14.014.014.014.0

17.517.517.517.5

17.517.517.517.5

17.517.517.517.517.517.517.517.517.5

17.517.517.517.517.5

23.023.023.023.0

23.023.024.024.0

24.024.024.024.024.024.024.024.024.0

24.024.024.024.024.0

12.012.012.012.0

12.012.012.012.0

12.012.012.012.0

17.017.017.017.0

17.017.017.017.0

17.017.017.017.017.017.017.017.017.0

17.017.017.017.0

21.021.021.021.0

21.021.021.021.0

21.021.021.021.021.021.021.021.021.0

21.021.021.021.021.0

28.028.028.028.0

28.028.028.028.0

28.028.028.028.028.028.028.028.028.0

28.028.028.028.028.0

25252525

25252525

25252525

25252525

25252525

252525252525252525

25252525

25252525

25252525

252525252525252525

2525252525

30303030

30303030

303030303030303030

3030303030

0.550.550.550.55

0.550.550.550.55

0.550.550.550.55

0.700.700.700.70

0.700.700.700.70

0.700.700.700.700.700.700.700.700.70

0.700.700.700.70

0.700.700.700.70

0.700.700.700.70

0.700.700.700.700.700.700.700.700.70

0.700.700.700.700.70

0.700.700.700.70

0.700.700.700.70

0.700.700.700.700.800.800.800.800.80

0.800.800.800.800.80

5.05.0

5.05.05.05.0

5.05.05.05.0

7.57.57.57.5

7.57.57.57.5

7.57.57.57.57.57.57.57.57.5

7.57.57.57.5

7.57.57.57.5

7.57.57.57.5

7.57.57.57.57.57.57.57.57.5

7.57.57.57.57.5

10.010.010.010.0

10.010.010.010.0

10.010.010.010.010.010.010.010.010.0

10.010.010.010.010.0

TYPE Tmax Dmax Hmax Lmin F d




SVC 180D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 220D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 270D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 330D-07D 4.5 9.0 10.0 25 5.0 0.55

SVC 390D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 470D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 560D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 680D-07D 4.5 9.0 10.0 25 5.0 0.55SVC 180D-10B 5.0 13.5 16.5 25 7.5 0.70SVC 220D-10B 5.0 13.5 16.5 25 7.5 0.70SVC 270D-10B 5.0 13.5 16.5 25 7.5 0.70SVC 330D-10B 5.0 13.5 16.5 25 7.5 0.70






SVC 820D-05A 4.5 7.0 10.0 25 5.0 0.55SVC 101D-05A 4.5 7.0 10.0 25 5.0 0.55SVC 121D-05A 4.5 7.0 10.0 25 5.0 0.55SVC 151D-05A 4.5 7.0 10.0 25 5.0 0.55



49


SVC

Body Diameter DSee Page 46

Body thickness T

Lead diameter d 0.55±0.05 0.70±0.05

Pitch of sprocket hole P0 12.7±0.3

Pitch of component P 6.35±1.3 25.4±1.0

Lead lenth from hole center to Lead P1 3.85±0.7 8.95±1.0

Lead length from hole center toP2 6.35±1.3 12.7±1.5

component center

Lead spacing F 5.0 7.5±1.0

Deviation along tape S 0±1.0

Deviation across tape h 0±2.0

Carrier tape width W 18.0

Hold down tape width W0 5.0min 9.0min

Position of sprocket hole W1 9.0±0.5

Hold down tape position W2 3.0max

Lead wire clinch height H0 16.0±0.5

Height of component hole H 20.0

Component height H1 32.25max

Diameter of sprocket hole D0 4.0±0.2

Length of snipped lead L 11.0max

Total tape thickness t1 0.7±0.2

Total thickness tape and lead wire t2 1.5max 1.7max

Length of snipped lead lx 1.0max

ITEM Code

+1.0-0.5

+1.5-1.0

FS5, FK5 FF9

Dimensions(mm)

Body Diameter DSee Page 46

Body thickness T

Lead diameter d 0.70±0.05

Pitch of sprocket hole P0 15.0±0.3

Pitch of component P 15.0±1.0 30.0±1.0

Lead lenth from hole center to Lead P1 3.75±1.0

Lead length from hole center toP2 7.50±1.5

component center

Lead spacing F 7.5±1.0

Deviation along tape S 0±1.0

Deviation across tape h 0±2.0

Carrier tape width W 18.0

Hold down tape width W0 5.0min

Position of sprocket hole W1 9.0±0.5

Hold down tape position W2 3.0max

Lead wire clinch height H0 16.0±0.5

Height of component hole H 20.0

Component height H1 40.00max

Diameter of sprocket hole D0 4.0±0.2

Length of snipped lead L 11.0max

Total tape thickness t1 0.7±0.2

Total thickness tape and lead wire t2 1.7max

Length of snipped lead lx 1.0max

ITEM Code

+1.0-0.5

+1.5-1.0

FF7 FF8

Dimensions(mm)

+0.8-0.2

50


SVC

CHAR, CURVES AND LIFETIME

05B (SVC 180D-05B to SVC680D-05B)

TRANSIENT V-I CHARACTIC CURVES

Current waveform Under 10-2

A : DCOver 10

-1

A : 8/20

05B (SVC 180D-05B to SVC680D-05B)

05A (SVC 820D-05A to SVC471D-05A) 05A (SVC 820D-05A to SVC471D-05A)

PULSE LIFETIME RATINGS

Notes : 2 - pulse : 5 - minute interval3 to 10 - pulse : 2 -minute intervalUp to 10

6

- pulse : 10 - second intervla

51


SVC

07B (SVC 180D-07B to SVC680D-07B)

TRANSIENT V-I CHARACTERISTIC CURVES


A : DCOver 10

-1

A : 8/20

07B (SVC 180D-07B to SVC680D-07B)




6


52


SVC

10B (SVC 180D-10B to SVC680D-10B)



A : DCOver 10

-1

A : 8/20

10B (SVC 180D-10B to SVC680D-10B)




6


53


SVC

10A (SVC561D-10A to SVC112D-10A)



A : DCOver 10

-1

A : 8/20

10A (SVC 561D-10A to SVC112D-10A)

14B (SVC 180D-14B to ENC680D-14B) 14B (SVC 180D-14B to SVC680D-14B)



6


54


SVC

14A (SVC 820D-14A to SVC471D-14A)



A : DCOver 10

-1

A : 8/20

14A (SVC 820D-14A to SVC471D-14A)




6


55


SVC

20B (SVC180D-20B to SVC680D-20B)



A : DCOver 10

-1

A : 8/20

20B (SVC180D-20B to SVC680D-20B)




6


56


SVC

20A (SVC 561D-20A to SVC182D-20A)



A : DCOver 10

-1

A : 8/20

20A (SVC 561D-20A to SVC182D-20A)



6


57


SVCAPPLICATIONS

Telecommunication circuit protection

Switching circuit protection

Power supply circuit protection

Line circuit

AC/DC single-phase circuit

Line and groud circuit

AC three-phase circuit

AC/DC single-phase circuit AC three-phase circuit

The protection of semiconducting elements such as diodes,thyristors, transistors, IC and relays against transient voltages.

Similar protection of many types of measuring instruments,control machinery and communication equipment and broadcastingequipment against inductive lightning and switching surges.

Protection of general purpose electrical equipment, domesticmechinery and appliances. TV and radios and similar consumerproducts against lightning and switching surges.

Varistor voltage selection table (ZL)

Notes : ①The power supply voltage must not exceed the maximumallowable circuit voltage.②Since independent wiring loads and capacitive loads cause thevoltage build-up at the time of opening or closing the load, use SVChaving a varistor voltage as high as possible.( mark)③The bold faced portions of the type letters vary.

Notes : The varistor SVC has a capacitance value. Take not of this whenapplying them to high-frequency signal circuits.

Protection of relay(Contact coil)

Protection of semiconductors

Notes : ①When subjected to megger testing (500V DC), the insulationresistance value can decrease due to the leakage current of theSVC, To avoid this remove the varistor or use marked SVC.②When subjected to dielectric strength test(1000V AC). remove theSVC or use marked SVC.Select varistors taking a note of operating conditions peculiar to theequipment.

Notes : ①The power supply voltage must not exceed the maximumallowable circuit voltage of the SVC②Pay due attention to the surge energy generated by the load.③Select SVC referring to the pulse lifetime rating.④To further reduce the tendency of sparking across the contactsconnect a capacitor parallel with the SVC. This will also protect theequipment from electromagnetic wave jamming.

Power supply voltage Type100V AC SVC201D-A

SVC221D-ASVC241D-ASVC271D-A

200V AC SVC391D-ASVC431D-ASVC471D-A

12V DC SVC220D-B24V DC SVC390D-B

Varistor voltage selection guied

Power supply voltage Type12V DC SVC180D-B

SVC220D-BSVC820D-A

24V AC SVC390D-BSVC820D-A

Varistor voltage selection table (ZE)

Power supply voltage Type100V AC SVC431D-A200V AC SVC471D-A

SVC751D-A to SVC 112D-ASVC182D-A Varistor voltage selection guide

Power supply voltage Type12V DC SVC220D-B24V DC SVC390D-B100V DC SVC151D-A100V AC SVC201D-A

SVC221D-ASVC241D-ASVC271D-A

58


SVC

1. Overcurrent protection

When surges exceed the rating for the SVC, short-circuits ordamages can be expected. Take following precautions.

2.Installation

① When operated at location near heating element or exp-osed to direct sun light, confirm that the the ambienttemparature range.② When operated in dusty or dirty locations, or exposed tocorrosive atomospheres, or where metallic powders or saltcan be expected, be sure to mount within a protective enclo-sure.

3. Molding

5. Electrical Characteristics

4.Current, power and energy rating vs, temperature

When shielding the SVC in a resin molding, take a note of thematerials used and temperature, since they influence thereliability. For further information please contact SAMWHA

Operating ambient temperature -40 to + 85Storage temperature -40 to + 125

Voltage temperature coefficient -0.05%Insulation resistance(at500V) Over 1000MΩ

① Connect the SVC at a position nearer to the equipmentthan the overcurrent protection device “Ⅰ”(fuse, MCCB) as isshown in the diagram.When the SVC is shorted, the overcurrent protection device“Ⅰ”operates (trips or blow off the fuse).② If the overcurrent protection device “Ⅰ”can not be in-stalled in “Ⅰ”position, connect a fuse at “Ⅱ”position. Selectfuse rated current for the SVC referring to the following table.

③ When “Z2”SVC is connected between the equipment andground install an ELCB (Earth Leakage Circuit Breaker). Ifnot possible, connect a fuse or thermal fuse at “Ⅲ”position.

SVC05A 07A 10A 14A 20A05B 07B 10B 14B 20B

Applicable fuse1 to 2 2 to 3 3 to 5 3 to 10 5 to 15

rated current(A)

Application notes

Recognized standards

Standard

UL

CAS

ISO 9002 94.12.15

93.07.27

93.07.06

88.05.10

93.03.03Transient Voltagesurge suppressors

Cord connectedand Direct Plug inType Equipment

Pemanentlyconnected type

equipment

125V AC

250V AC

125V AC

SVC 180D - ~SVC 821D -

SVC 201D - A~SVC 182D - A



05Series07Series10Series14Series20Series

10Series14Series20Series

E151195

E97754

E154171

LR78923

KRQ-007/94

Across-The-LineComponents

Protectors for datacommunication

and fire alarm circuirt

Varistor for Across-The-Line use astransient protectionon 120Vac system

UL 1449

UL 1414

UL 497B

C22.2NO.1-M1981

Date Content Applicable SVC series File No.

59


SVCAPPLICATION EXAMPEL

60


SVC

Varistor Terminology

Varistor Voltage : VnomVaristor peak terminal voltagemeasured with a specified currentappliedThe DC current applied is 1mAnormally.

Clamping voltage : VcMaximum terminal voltage (peakvoltage across the varistor)measured with an applied 8/20impulse of a given peak current.

CapacitanceTypical values measured at a testfrequency of 1kHz

Rated peak transient current : itm

Maximum peak current through thevaristor with line voltage applied.The maximum peak current with inthe varistor voltage change ratio of±10% with the standard 8/20impulse current applied two timesat 5 minute interval.

Rated transient energy : WtmMaximum allowable energy for asingle impulse of 2ms square-wavecurrent waveform with rated contin-uous voltage appl ied. Maximumenergy rating base on a shift ofVnom of less than ±10% of initialvalue.

Pulse lifetime ratingThis is expressed as the maximumallowable number of impulse curr-ents applied.8/20 impulse current (or 2ms sq-uare wave) is applied at prescribedinterval.Th is curve a lso prov ides forderating current as required withrepetitive pulsing.

Tset current waveformCharacteristics tests for Varistorsare carried out by using 8/20 testimpu lses Data such as themaximum clamping voltage(Vc)andthe transient peak current(ltm) areobta ined by us ing th is impu lsecurrent.However, for the Vc characteristicsof the Axial package type a 10mADC squarewave current is used tocary out the test.

Rated RMS Voltage : VacmMaximum cont inuous s inusoidalRMS vo l tage a t 50/60Hz wh ichmay be applied.

Rated DC Voltage : VdcmMaximum continuous DC voltagewhich may be applied.

Rated average power dissipation: Ptam

Maximum average power that canbe appl ied wi th in the spec i f iedambient temperature.

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