125
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
RoHS
Description
The ZA Series of transient voltage surge suppressors
are radial leaded varistors (MOVs) designed for
use in the protection of low and medium-voltage
circuits and systems. Typical applications include
motor control, telecom, automotive systems,
solenoid, and power supply circuits to protect circuit
board components and maintain data integrity.
These devices are available in five model sizes:
5mm, 7mm, 10mm, 14mm and 20mm, and feature
a wide VDC voltage range of 5.5V to 615V.
See ZA Series Device Ratings and Specifications
Table for part number and brand information.
Features
t -FBEoGSFFBOE3P)4
compliant option
available. Please see
the device and ratings
specifications table
for more information.
t 8JEFPQFSBUJOHWPMUBHF
range VM(AC)RMS
4V to 460V
t %$WPMUBHFSBUJOHT
5.5V to 615V
t /PEFSBUJOHVQUP
85ºC ambient
t NPEFMTJ[FT
available: 5, 7, 10,
14, and 20mm
t 3BEJBMMFBEQBDLBHFGPS
hard-wired or printed
circuit board designs
t "WBJMBCMFJOUBQFBOE
SFFMPSCVMLQBDL
t 4UBOEBSEMFBE
form options
Agency Approvals
Absolute Maximum Ratings
t'PSSBUJOHTPGJOEJWJEVBMNFNCFSTPGBTFSJFTTFF%FWJDF3BUJOHTBOE4QFDJmDBUJPOTDIBSU
Agency Agency File Number
E135010, (+ E75961 for selected parts)
116895E
42201-006
Continuous ZA Series Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS) 4 to 460 V
DC Voltage Range (VM(DC)) 5.5 to 615 V
Transients:
1FBL1VMTF$VSSFOU*TM)
'PSμT$VSSFOU8BWF4FF'JHVSF 50 to 6500 A
Single Pulse Energy Range (Note 1)
'PSμT$VSSFOU8BWF8TM) 0.1 to 52 J
Operating Ambient Temperature Range (TA) -55 to +85 ºC
Storage Temperature Range (TSTG) -55 to +125 ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current <0.01 $
)J1PU&ODBQTVMBUJPO$0"5*/(*TPMBUJPO7PMUBHF$BQBCJMJUZ
%JFMFDUSJDNVTUXJUITUBOEJOEJDBUFE%$WPMUBHFGPSPOFNJOVUFQFS.*-o45%o.FUIPE 2500 V
$0"5*/(*OTVMBUJPO3FTJTUBODF 1000 MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
ZA Varistor Series
126
Varistor Products
©2008 Littelfuse, Inc.
Revision: February 27, 2009
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series Ratings & Specifications
Lead–free
and RoHS Compliant
Models
Standard
Models Model
Size
Disc
Dia.
(mm)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Varistor Voltage at
1mA
DC Test Current
Maximum
Clamping
Voltage
8 x 20μs
Typical
Capaci-
tance
f =
1MHz
VRMS VDC
Energy 10
x 1000μs
Peak
Current
8 x 20μs
Part
Number Branding Part
Number Branding VM(AC) VM(DC) WTM I
TM VNOM
Min
VNOM
Max VCIPK C
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V8ZA05P PZ08 V8ZA05 Z08 5 4 5.5 0.1 50 6 11 30 1 2000
V8ZA1P P08Z1 V8ZA1 08Z1 7 4 5.5 0.4 100 6 11 22 2.5 4190
V8ZA2P P08Z2 V8ZA2 08Z2 10 4 5.5 0.8 250 6 11 20 5 7000
V12ZA05P PZ12 V12ZA05 Z12 5 6 8 0.14 50 9 16 37 1 1700
V12ZA1P P12Z1 V12ZA1 12Z1 7 6 8 0.6 100 9 16 34 2.5 3350
V12ZA2P P12Z2 V12ZA2 12Z2 10 6 8 1.2 250 9 16 30 5 6100
V18ZA05P PZ18 V18ZA05 Z18 5 10 14 0.17 100 14.4 21.6 36 1 1400
V18ZA1P P18Z1 V18ZA1 18Z1 7 10 14 0.8 250 14.4 21.6 36 2.5 2700
V18ZA2P P18Z2 V18ZA2 18Z2 10 10 14 1.5 500 14.4 21.6 36 5 5300
V18ZA3P P18Z3 V18ZA3 18Z3 14 10 14 3.5 1000 14.4 21.6 36 10 18870
V18ZA40P P18Z40 V18ZA40 18Z40 20 10 14 /PUF 2000 14.4
/PUF 21.6 37 20 22000
V22ZA05P PZ22 V22ZA05 Z22 5 14 18 0.2 100 18.7 26 43 1 1220
V22ZA1P P22Z1 V22ZA1 22Z1 7 14 18 0.9 250 18.7 26 43 2.5 2375
V22ZA2P P22Z2 V22ZA2 22Z2 10 14 18 2 500 18.7 26 43 5 4500
V22ZA3P P22Z3 V22ZA3 22Z3 14 14 18 4 1000 18.7 26 43 10 14730
V24ZA50P P24Z50 V24ZA50 24Z50 20 14 /PUF /PUF
2) 2000 19.2
/PUF 26 43 20 18000
V27ZA05P PZ27 V27ZA05 Z27 5 17 22 0.25 100 23 31.1 53 1 920
V27ZA1P P27Z1 V27ZA1 27Z1 7 17 22 1 250 23 31.1 53 2.5 1875
V27ZA2P P27Z2 V27ZA2 27Z2 10 17 22 2.5 500 23 31.1 53 5 3850
V27ZA4P P27Z4 V27ZA4 27Z4 14 17 22 5 1000 23 31.1 53 10 11480
V27ZA60P P27Z60 V27ZA60 27Z60 20 17 22 /PUF
2) 2000 /PUF
3) 31.1 50 20 13000
V33ZA05P PZ33 V33ZA05 Z33 5 20 26 0.3 100 29.5 38 65 1 790
V33ZA1P P33Z1 V33ZA1 33Z1 7 20 26 1.2 250 29.5 36.5 65 2.5 1620
V33ZA2P P33Z2 V33ZA2 33Z2 10 20 26 3 500 29.5 36.5 65 5 3495
V33ZA5P P33Z5 V33ZA5 33Z5 14 20 26 6 1000 29.5 36.5 65 10 9290
V33ZA70P P33Z70 V33ZA70 33Z70 20 21 27 /PUF
2) 2000 29.5
/PUF 36.5 58 20 13000
V36ZA80P P36Z80 V36ZA80 36Z80 20 23 31 /PUF
2) 2000 /PUF
3) 40 63 20 12000
V39ZA05P PZ39 V39ZA05 Z39 5 25 31 0.3 100 35 46 79 1 675
V39ZA1P P39Z1 V39ZA1 39Z1 7 25 31 1.2 250 35 43 79 2.5 1350
V39ZA3P P39Z3 V39ZA3 39Z3 10 25 31 3 500 35 43 76 5 3100
V39ZA6P P39Z6 V39ZA6 39Z6 14 25 31 7.2 1000 35 43 76 10 7000
V39ZA20P P39Z20 V39ZA20 39Z20 20 25 31 20 2000 35 43 76 20 12000
V47ZA05P PZ47 V47ZA05 Z47 5 30 38 0.4 100 42 55 93 1 585
V47ZA1P P47Z1 V47ZA1 47Z1 7 30 38 1.8 250 42 52 93 2.5 1245
V47ZA3P P47Z3 V47ZA3 47Z3 10 30 38 4.5 500 42 52 93 5 2590
V47ZA7P P47Z7 V47ZA7 47Z7 14 30 38 8.8 1000 42 52 93 10 6270
V47ZA20P P47Z20 V47ZA20 47Z20 20 30 38 23 2000 42 52 93 20 11000
V56ZA05P PZ56 V56ZA05 Z56 5 35 45 0.5 100 50 66 110 1 500
V56ZA2P P56Z2 V56ZA2 56Z2 7 35 45 2.3 250 50 62 110 2.5 1035
V56ZA3P P56Z3 V56ZA3 56Z3 10 35 45 5.5 500 50 62 110 5 2150
V56ZA8P P56Z8 V56ZA8 56Z8 14 35 45 10 1000 50 62 110 10 4840
V56ZA20P P56Z20 V56ZA20 56Z20 20 35 45 30 2000 50 62 110 20 10000
V68ZA05P PZ68 V68ZA05 Z68 5 40 56 0.6 100 61 80 135 1 400
V68ZA2P P68Z2 V68ZA2 68Z2 7 40 56 3 250 61 75 135 2.5 910
127
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
Lead–free
and RoHS Compliant
Models
Standard
Models Model
Size
Disc
Dia.
(mm)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Varistor Voltage at
1mA
DC Test Current
Maximum
Clamping
Voltage
8 x 20μs
Typical
Capaci-
tance
f =
1MHz
VRMS VDC
Energy 10
x 1000μs
Peak
Current
8 x 20μs
Part
Number Branding Part
Number Branding VM(AC) VM(DC) WTM I
TM VNOM
Min
VNOM
Max VCIPK C
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V68ZA3P P68Z3 V68ZA3 68Z3 10 40 56 6.5 500 61 75 135 5 1850
V68ZA10P P68Z10 V68ZA10 68Z10 14 40 56 13 1000 61 75 135 10 3870
V68ZA20P P68Z20 V68ZA20 68Z20 20 40 56 33 2000 61 75 135 20 9000
V82ZA05P PZ82 V82ZA05 Z82 5 50 68 2 400 73 97 135 5 355
V82ZA2P P82Z2 V82ZA2 82Z2 7 50 68 4 1200 73 91 135 10 700
V82ZA4P P82Z4 V82ZA4 82Z4 10 50 68 8 2500 73 91 135 25 1485
V82ZA12P P82Z12 V82ZA12 82Z12 14 50 68 15 4500 73 91 145 50 3380
V100ZA05P PZ100 V100ZA05 Z100 5 60 81 2.5 400 90 117 165 5 310
V100ZA3P P100Z V100ZA3 100Z 7 60 81 5 1200 90 110 165 10 600
V100ZA4P P100Z4 V100ZA4 100Z4 10 60 81 10 2500 90 110 165 25 1200
V100ZA15P P100Z15 V100ZA15 100Z15 14 60 81 20 4500 90 110 175 50 2900
V120ZA05P PZ120 V120ZA05 Z120 5 75 102 3 400 108 138 205 5 250
V120ZA1P P120Z V120ZA1 120Z 7 75 102 6 1200 108 132 205 10 515
V120ZA4P P120Z4 V120ZA4 120Z4 10 75 102 12 2500 108 132 200 25 1100
V120ZA6P P120Z6 V120ZA6 120Z6 14 75 102 22 4500 108 132 210 50 2450
V120ZA20P P120Z20 V120ZA20 120Z20 20 75 102 33 6500 108 132 210 100 5000
V150ZA05P PZ150 V150ZA05 Z150 5 92 127 4 400 135 173 250 5 190
V150ZA1P PZ051 V150ZA1 Z051 7 95 127 8 1200 135 165 250 10 460
V150ZA4P P150Z4 V150ZA4 150Z4 10 95 127 15 2500 135 165 250 25 860
V150ZA8P P150Z8 V150ZA8 150Z8 14 95 127 20 4500 135 165 250 50 1910
V150ZA20P P150Z20 V150ZA20 150Z20 20 95 127 45 6500 135 165 250 100 3500
V180ZA05P PZ180 V180ZA05 Z180 5 110 153 5 400 162 207 295 5 100
V180ZA1P P180Z V180ZA1 180Z 7 115 153 10 1200 162 198 300 10 320
V180ZA5P P180Z5 V180ZA5 180Z5 10 115 153 18 2500 162 198 300 25 465
V180ZA10P P180Z10 V180ZA10 180Z10 14 115 153 35 4500 162 198 300 50 1190
V180ZA20P P180Z20 V180ZA20 180Z20 20 115 153 52 6500 162 198 300 100 2400
V205ZA05P PZ205 V205ZA05 Z205 5 130 170 5.5 400 184 226 340 5 100
V220ZA05P PZ220 V220ZA05 Z220 5 140 180 6 400 198 253 360 5 95
V240ZA05P PZ240 V240ZA05 Z240 5 150 200 7 400 216 264 395 5 90
V270ZA05P PZ270 V270ZA05 Z270 5 175 225 7.5 400 243 311 455 5 75
V330ZA05P PZ330 V330ZA05 Z330 5 210 275 9 400 297 380 540 5 70
V360ZA05P PZ360 V360ZA05 Z360 5 230 300 9.5 400 324 396 595 5 60
V390ZA05P PZ390 V390ZA05 Z390 5 250 330 10 400 351 449 650 5 80
V430ZA05P PZ430 V430ZA05 Z430 5 275 369 11 400 387 495 710 5 75
V470ZA05P PZ470 V470ZA05 Z470 5 300 385 12 400 420 517 775 5 70
V620ZA05P PZ620 V620ZA05 Z620 5 385 505 13 400 558 682 1025 5 45
V680ZA05P PZ680 V680ZA05 Z680 5 420 560 14 400 610 748 1120 5 40
V715ZA05P PZ715 V715ZA05 Z715 5 440 585 15.5 400 643 787 1180 5 35
V750ZA05P PZ750 V750ZA05 Z750 5 460 615 17 400 675 825 1240 5 30
ZA Series Ratings & Specifications (Continued...)
/PUF
 "WFSBHFQPXFSEJTTJQBUJPOPGUSBOTJFOUTOPUUPFYDFFE8888PS8GPSNPEFMTJ[FTNNNNNNNNBOENNSFTQFDUJWFMZ
&OFSHZSBUJOHGPSJNQVMTFEVSBUJPOPGNTNJOJNVNUPPOFIBMGPGQFBLDVSSFOUBVUP-PBE%VNQ
3. 10mA DC test current.
4. Also rated to withstand 24V for 5 minutes.
)JHIFSWPMUBHFTBWBJMBCMFDPOUBDU-JUUFMGVTF
$BQBDJUBODF7BMVFTTIPXOBSF5:1*$"-
p"MTP3FDPHOJTFEUP6-5SBOTJFOU7PMUBHF4VSHF4VQQSFTTPST'JMF&
128
Varistor Products
©2008 Littelfuse, Inc.
Revision: February 27, 2009
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
V360ZA05(P) - V750ZA05(P)
3000
2000
1000
500
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
0.01 0.1 1 10 100 10000.0010.0001
V750ZA05(P)
V715ZA05(P)
V680ZA05(P)
V620ZA05(P)
V470ZA05(P)
V430ZA05(P)
V390ZA05(P)
V360ZA05(P)
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
360 TO 750VN(DC) RATING
TA = -55oC TO 85oC
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per pulse
times the number of pulses per second. The power so developed
must be within the specifications shown on the Device Ratings
BOE4QFDJmDBUJPOT5BCMFGPSUIFTQFDJmDEFWJDF'VSUIFSNPSF
the operating values need to be derated at high temperatures as
shown in the diagram above. Because varistors can only dissipate
a relatively small amount of average power they are, therefore, not
suitable for repetitive applications that involve substantial amounts
of average power dissipation.
Power Dissipation Ratings
600
500
400
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 100101102103
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
8 TO 68VN(DC) RATING
TA = -55oC TO 85oC
10
V68ZA05(P)
V56ZA05(P)
V47ZA05(P)
V39ZA05(P)
V33ZA05(P)
V27ZA05(P)
V22ZA05(P)
V18ZA05(P)
V12ZA05(P)
V8ZA05(P)
10-3
Maximum Clamping Voltage for 5mm Parts
Peak Pulse Current Test Waveform
V8ZA05(P) - V68ZA05(P) V82ZA05(P) - V33ZA05(P)
2000
1000
500
200
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
0.01 0.1 1 10 100 1000
100
0.0010.0001
V100ZA05(P)
V82ZA05(P)
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
82 TO 330VN(DC) RATING
TA = -55oC TO 85oC
V330ZA05(P)
V270ZA05(P)
V240ZA05(P)
V220ZA05(P)
V205ZA05(P)
V180ZA05(P)
V150ZA05(P)
V120ZA05(P)
017JSUVBM0SJHJOPG8BWF
55JNFGSPNUPPG1FBL
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example 'PSBOμT$VSSFOU8BWFGPSN
8μs = T1 = Rise Time
20μs = T2 = Decay Time
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE ( oC)
PERCENT OF RATED VALUE
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK VALUE
Figure 1 Figure 2
Figure 3 Figure 4
Figure 5
129
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
Maximum Clamping Voltage for 7mm Parts
V8ZA1(P) - V68ZA2(P)
Maximum Clamping Voltage for 10mm Parts
V82ZA2(P) - V180ZA1(P)
V8ZA2(P) - V68ZA3(P)
Maximum Clamping Voltage for 14mm Parts
V82ZA4(P) - V180ZA5(P)
V18ZA3(P) - V68ZA10(P)
500
400
300
200
100
90
80
70
60
50
40
30
20
10
MAXIMUM PEAK VOLTS (V)
10-3 10-2 10-1 100101102103
MAXIMUM CLAMPING VOLTAGE
8 TO 68VN(DC) RATING
TA = -55oC TO 85oC
PEAK AMPERES (A)
V68ZA2(P)
V56ZA2(P)
V47ZA1(P)
V39ZA1(P)
V33ZA1(P)
V27ZA1(P)
V22ZA1(P)
V12ZA1(P)
V18ZA1(P)
V8ZA1(P)
MODEL SIZE 7mm
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 100101102103
10-3
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
82 TO 180VN(DC) RATING
TA = -55oC TO 85oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V180ZA1(P)
V150ZA1(P)
V120ZA1(P)
V100ZA3(P)
V82ZA2(P)
500
400
300
200
100
90
80
70
60
50
40
30
20
10
MAXIMUM PEAK VOLTS (V)
10-3 10-2 10-1 100101102103
PEAK AMPERES (A)
V68ZA3(P)
V56ZA3(P)
V47ZA3(P)
V39ZA3(P)
V33ZA2(P)
V27ZA2(P)
V22ZA2(P)
V18ZA2(P)
V8ZA2(P)
V12ZA2(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
8 TO 68VN(DC) RATING
TA = -55oC TO 85oC
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 100101102103
10-3
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
82 TO 180VN(DC) RATING
TA = -55oC TO 85oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V180ZA5(P)
V150ZA4(P)
V120ZA4(P)
V100ZA4(P)
V82ZA4(P)
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10-3 10-2 10-1 100101102103
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V68ZA10(P)
V56ZA8(P)
V47ZA7(P)
V39ZA6(P)
V33ZA5(P)
V27ZA4(P)
V22ZA3(P)
V18ZA3(P)
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55oC TO 85oC
MODEL SIZE 14mm
V82ZA12(P) - V180ZA10(P)
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 100101102103
10-3
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
82 TO 180VN(DC) RATING
TA = -55oC TO 85oC
4,000
3,000
2,000
1,000
900
800
700
600
500
400
300
200
100
104
V180ZA10(P)
V150ZA8(P)
V120ZA6(P)
V100ZA15(P)
V82ZA12(P)
Figure 6 Figure 7
Figure 8 Figure 9
Figure 10 Figure 11
130
Varistor Products
©2008 Littelfuse, Inc.
Revision: February 27, 2009
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Maximum Clamping Voltage for 20mm Parts
V18ZA40(P) - V36ZA80(P)
Repetitive Surge Capability for 5mm Parts
V39ZA20(P) - V180ZA20(P)
V8ZA05(P) V12ZA05(P) - V68ZA05(P)
V82ZA05(P) - V750ZA05(P)
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK VOLTS (V)
PEAK AMPERES (A)
10-2 10-1 100101102103
10-3 104
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
18 TO 36VN(DC) RATING
TA = -55oC TO 85oC
V36ZA80(P)
V33ZA70(P)
V27ZA60(P)
V24ZA50(P)
V18ZA40P(P)
10-3 10-2 10-1 100101102104
103
1,000
500
300
200
30
PEAK AMPERES (A)
MAXIMUM PEAK VOLTS (V)
V56ZA20(P)
V47ZA20(P)
V39ZA20(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
TA = -55oC TO 85oC
39 TO 180VM(AC) RATING V180ZA20(P)
V150ZA20(P)
V120ZA20(P)
100
50
V68ZA20(P)
50
20
10
5
2
1
0.5
0.2
0.1
SURGE CURRENT (A)
20 100 1,000 10,000
IMPULSE DURATION ( μs)
1
10
102
2
103
INDEFINITE
104
105
106
MODEL SIZE 5mm
V8ZA05(P)
100
50
20
10
2
1
0.5
0.2
0.1
SURGE CURRENT (A)
20 100 1,000 10,000
IMPULSE DURATION ( μs)
INDEFINITE
104
105
106
MODEL SIZE 5mm
V12ZA05(P) - V68ZA05(P)
110
102
2
103
50
20
10
5
2
1
0.5
0.2
SURGE CURRENT (A)
20 100 1,000 10,000
IMPULSE DURATION ( μs)
1
10
102
2103
INDEFINITE
104
105
106
MODEL SIZE 5mm
V82ZA05(P) - V750ZA05(P)
500
200
100
Figure 11 Figure 12
Figure 13 Figure 14
Figure 15
131
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
Repetitive Surge Capability for 7mm Parts
V8ZA1(P) - V12ZA1(P)
V18ZA1(P) - V68ZA2(P)
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
10
102
2
103
INDEFINITE
104
105
106
200
100
50
20
10
5
2
1
0.5
0.2
MODEL SIZE 7mm
V8ZA1(P) - V12ZA1(P)
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
10
102
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
MODEL SIZE 7mm
V18ZA1(P) - V68ZA2(P)
Repetitive Surge Capability for 10mm Parts
V82ZA2(P) - V180ZA1(P)
V8ZA2(P) - V127ZA2(P)
V18ZA2(P) - V68ZA3(P)
V82ZA4(P) - V180ZA5(P)
2,000
1,000
200
100
50
20
10
5
1
2
500
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
2
10
102
104
105
106
103
INDEFINITE
MODEL SIZE 7mm
V82ZA2(P) - V180ZA1(P)
1,000
500
100
50
20
10
5
1
2
200
20
SURGE CURRENT (A)
1
2
105
106
104
INDEFINITE
MODEL SIZE 10mm
V18ZA2(P) - V68ZA3(P)
100 1,000 10,000
IMPULSE DURATION
(μ
s
)
102
103
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
10
102
2
103
INDEFINITE
500
200
100
50
20
10
2
1
0.5
0.2
104
105
106
5
MODEL SIZE 10mm
V8ZA2(P) - V12ZA2(P)
5,000
2,000
1,000
500
200
100
50
20
10
5
2
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
10
102
2
103
INDEFINITE
104
105
106
MODEL SIZE 10mm
V82ZA4(P) - V180ZA5(P)
Figure 15 Figure 18
Figure 16 Figure 19
Figure 17 Figure 20
132
Varistor Products
©2008 Littelfuse, Inc.
Revision: February 27, 2009
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Repetitive Surge Capability for 14mm Parts
V18ZA3(P) - V68ZA10(P) V82ZA12(P) - V180ZA10(P)
200
100
50
20
10
5
1
2
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
2
10
102
104
105
106
103
INDEFINITE
1,000
500
MODEL SIZE 14mm
V18ZA3(P) - V68ZA10(P)
5,000
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
2
10
104
105
106
103
INDEFINITE
1,000 102
MODEL SIZE 14mm
V82ZA12(P) - V180ZA10(P)
V120ZA20(P) - V180ZA20(P)
10,0001,000100
20
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
5,000
10,000
2,000
500
100
20
10
2
1,000
200
50
1
5
1
2
10
102
103
104
105
106
INDEFINITE
MODEL SIZE 20mm
V120ZA20(P) - V180ZA20(P)
V18ZA40(P) - V68ZA20(P)
2,000
200
100
50
20
10
5
2
500
20 100 1,000 10,000
IMPULSE DURATION ( μs)
SURGE CURRENT (A)
1
2
10
1,000
102
103
104
105
106
INDEFINITE
MODEL SIZE 20mm
V18ZA40(P) - V68ZA20(P)
/05&*GQVMTFSBUJOHTBSFFYDFFEFEBTIJGUPG7/%$BUTQFDJmFEDVSSFOUPGNPSFUIFODPVMESFTVMU5IJTUZQFPGTIJGUXIJDIOPSNBMMZSFTVMUT
in a decrease of V/%$, may result in the device not meeting the original published specifications, but does not prevent the device from continuing to
function, and to provide ample protection.
Repetitive Surge Capability for 20mm Parts
Figure 21 Figure 22
Figure 23 Figure 24
133
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
Operating Ambient
Temperature Range -55°C to +85°C
Storage Temperature Range -55°C to +125°C
Humidity Aging ¡$3)IPVST
UZQJDBMWPMUBHFDIBOHF
Thermal Shock +85°C to -40°C 10 times
UZQJDBMWPMUBHFDIBOHF
Solvent Resistance .*-o45%o.FUIPE'
Moisture Sensitivity -FWFM+o45%o$
Lead Material 5JOo$PBUFE$PQQFS8JSF
Soldering
Characteristics
4PMEFSBCJMJUZQFS.*-o45%o
Method 208E
Insulating Material Cured, flame retardant epoxy polymer
NFFUT6-7oSFRVJSFNFOUT
Device Labeling .BSLFEXJUI-'WPMUBHF6-$4"MPHPT
and date code
Physical Specifications Environmental Specifications
ZA Series Varistors for Hi-Temperature Operating Conditions:
t 1IFOPMJDDPBUFE;"4FSJFTEFWJDFTBSFBWBJMBCMFXJUIJNQSPWFENBYJNVNPQFSBUJOHUFNQFSBUVSFPG¡$
t 5IFTFEFWJDFTBMTPIBWFJNQSPWFEUFNQFSBUVSFDZDMJOHQFSGPSNBODFDBQBCJMJUZ
t 3BUJOHTBOETQFDJmDBUJPOTBSFBTQFSTUBOEBSE;"4FSJFTFYDFQU)Jo1PU
&ODBQTVMBUJPO*TPMBUJPO7PMUBHF$BQBCJMJUZ7
t 5PPSEFSBEEh9hUPQBSUOVNCFSFH7;"9
t 5IFTFEFWJDFTBSFOPU6-$4"7%&PS$&$$DFSUJmFE
t $POUBDUGBDUPSZGPSGVSUIFSEFUBJMT
Wave Solder Profile
0
50
100
150
200
250
300
00.511.522.5 33.54
TIME(MINUTES)
TEMPERATURE
(ºC)
Maximum Wave 240C
Lead–free Profile
0
50
100
150
200
250
300
00.511.522.5 33.54
TIME(MINUTES)
TEMPERATURE
(ºC)
Maximum Wave 260C
Non Lead–free Profile
Figure 25 Figure 26
134
Varistor Products
©2008 Littelfuse, Inc.
Revision: February 27, 2009
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Product Dimensions (mm)
Dimen-
sion
VRMS
Voltage
Model
5mm Size 7mm Size 10mm Size 14mm Size 20mm Size
Min.
mm
(in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
AAll - 10 (0.394) - 12 (0.472) - 16 (0.630) - 20 (0.787) - 26.5
(1.043)
ØD All - 7 (0.276) - 9 (0.354) - 12.5
(0.492) - 17 (0.669) - 23 (0.906)
eAll 4 (0.157) 6 (0.236) 4 (0.157) 6 (0.236) 6.5 (0.256) 8.5 (0.335) 6.5 (0.256) 8.5 (0.335) 6.5 (0.256)
/PUF
8.5 (0.335)
/PUF
e1
V8ZAV56ZA 1
(0.039) 3 (0.118) 1 (0.039) 3 (0.118) 1 (0.039) 3 (0.118) 1 (0.039) 3 (0.118) 1 (0.039) 3 (0.118)
V68ZAV100ZA 1.5
(0.059)
3.5
(0.138) 1.5 (0.059) 3.5
(0.138) 1.5 (0.059) 3.5
(0.138) 1.5 (0.059) 3.5
(0.138) 1.5 (0.059) 3.5
(0.138)
V120ZAV180ZA 1
(0.039) 3 (0.118) 1 (0.039) 3 (0.118) 1 (0.039) 3 (0.118) 1 (0.038) 3 (0.118) 1 (0.038) 3 (0.118)
V205ZAV750ZA 1.5
(0.059)
3.5
(0.138) --------
E
V8ZAV56ZA - 5 (0.197) - 5 (0.197) - 5 (0.197) - 5 (0.197) - 5 (0.197)
V68ZAV100ZA - 5.6
(0.220) -5.6
(0.220) -5.6
(0.220) -5.6
(0.220) -5.6
(0.220)
V120ZAV180ZA - 5 (0.197) - 5 (0.197) - 5 (0.197) - 5 (0.197) - 5 (0.197)
V205ZAV750ZA - 5.6
(0.220) --------
Øb All 0.585
(0.023)
0.685
(0.027)
0.585
(0.023)
0.685
(0.027)
0.76
(0.030)
0.86
(0.034)
0.76
(0.030)
0.86
(0.034)
0.76
(0.030)
0.86
(0.034)
AAll - 13.0
(0.512) - 15 (0.591) - 19.5
(0.768) -22.5
(0.886) -29.0
(1.142)
LTRIM All 2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
NN"-40"7"*-"#-&TFFBEEJUJPOBMMFBETUZMFPQUJPOT
 7;"1BOE7;$1POMZTVQQMJFEXJUIMFBETQBDJOHPGNNNN%JNFOTJPOFNJO%PFTOPUBQQMZUP53QBSUT
/05&4%JNFOTJPOTJONJMMJNFUFSTJODIFTJOQBSFOUIFTFT
t5PPSEFSUIJTDSJNQFEBOEUSJNNFEMFBETUZMFTUBOEBSESBEJBMUZQFNPEFMOVNCFSTBSFDIBOHFE
CZSFQMBDJOHUIFNPEFMMFUUFS;"XJUI;$5IJTPQUJPOJTTVQQMJFEJOCVMLPOMZ
Standard Model Order As
V18ZA3 V18ZC3
'PSDSJNQFEMFBETXJUIPVUUSJNNJOHBOEBOZWBSJUJPOTUP
UIFBCPWFDPOUBDU-JUUFMGVTF
Example:
CRIMPED AND TRIMMED LEAD
Radial lead types can be supplied with combination
preformed crimp and trimmed leads. This option is
supplied to the dimensions shown.
4FBUJOHQMBOFJOUFSQSFUBUJPOQFS*&$
135
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
Tape and Reel Specifications
$3*.1&%-&"%4;5 $3*.1&%-&"%4;5
P1
P0
E
DP
DH DH
W1
W
Ft
W2W0
P
DP
C
Db
H0
DD0
H1SEATING
PLANE
P2
P1
P1
W0
E
DP
DH DH
W1
W
Ft
W2
P
DP
C
Db
H0
DD0
H1SEATING
PLANE
P2
P1
P0
P2
DH
E
DH
DP
W1
W
Ft
W2W0
P
DP
Db
H
DD0
H1
P0
DH
E
DH
DP
W1
W
Ft
W2
P
DP
Db
H
DD0
H1
P1
P2
W0
6/%&3$3*.1&%-&"%4;6 6/%&3$3*.1&%-&"%4;6
U
P1
P0
P2
DH
E
DH
DP
W1
W
Ft
W2W0
P
DP
Db
Ho
DD0
H1
P0
U
DH
E
DH
DP
W1
W
Ft
W2
P
DP
Db
Ho
DD0
H1
P2
W0
P1
5 and 7mm Devices 10, 14 and 20mm Devices
453"*()5-&"%4;4 453"*()5-&"%4;4
136
Varistor Products
©2008 Littelfuse, Inc.
Revision: February 27, 2009
ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
SYMBOL DESCRIPTION MODEL SIZE
5mm 7mm 10mm 14mm 20mm
PPitch of Component     
P0'FFE)PMF1JUDI     
P1'FFE)PMF$FOUFSUP1JUDI     
P2)PMF$FOUFSUP$PNQPOFOU$FOUFS     
F-FBEUP-FBE%JTUBODF     
hComponent Alignment 2.0 Max 2.0 Max 2.0 Max 2.0 Max 2.0 Max
W5BQF8JEUI     
W0)PME%PXO5BQF8JEUI     
W1)PMF1PTJUJPO     
W2)PME%PXO5BQF1PTJUJPO 0.5 Max 0.5 Max 0.5 Max 0.5 Max 0.5 Max
H)FJHIUGSPN5BQF$FOUFSUP
Component Base     
H04FBUJOH1MBOF)FJHIU     
H1$PNQPOFOU)FJHIU 29.0 Max 32.0 Max 36.0 Max 40.0 Max 46.5 Max
D0'FFE)PMF%JBNFUFS     
t5PUBM5BQF5IJDLOFTT     
U6OEFSDSJNQ8JEUI 8.0 Max 8.0 Max 8.0 Max 8.0 Max 8.0 Max
pComponent Alignment 3° Max 3º Max 3° Max 3° Max 3° Max
Tape and Reel Specifications
t $POGPSNTUP"/4*BOE&*"TQFDJmDBUJPOT
t $BOCFTVQQMJFEUP*&$1VCMJDBUJPO
t 3BEJBMEFWJDFTPOUBQFBSFTVQQMJFEXJUIDSJNQFEMFBETTUSBJHIUMFBETPSVOEFSDSJNQFEMFBET
t NNQBSUTBSFBWBJMBCMFPOUBQFBOESFFMVQUP7"$POMZ
/05&-FBETBSFPGGTFUCZ%JNF
137
Varistor Products
Revision: February 27, 2009
©2008 Littelfuse, Inc. ZA Varistor Series
Radial Lead Varistors > ZA Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
ZA Series
Part Numbering System
For “VARISTOR”
NOMINAL VOLTAGE (VNOM )
(One, Two or Three Digits)
V XXX ZA XXXX
RELATIVE ENERGY INDICATOR
(One or Two Digits)
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
P
See OPTIONS CODES notes below
XXXXX
OPTION CODES
(See notes below)
BASE PART CODES
(See Ratings & Specifications tables and notes below)
SERIES + PACKAGING / LEAD STYLE
DESIGNATOR
(See BASE PART CODES notes below)
ZA = Bulk Pack / Straight Leads (standard)
ZC = Bulk Pack / Crimped and Trimmed Leads
ZS = Tape and Reel / Straight Leads
ZT = Tape and Reel / Crimped Leads
ZU = Tape and Reel / Under-Crimped Leads
Ordering Notes:
Series + Packaging / Lead Style Designators:
Ordering examples:
Straight
Lead
Bulk Pack
(standard)
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
Crimped &
Trimmed
Lead
Bulk Pack
Under-
Crimp Lead
Tape &
Reel
V18ZA3 V18ZS3V18ZT3V18ZC3V18ZU3
Standard Model Order As
V18ZA40 V18ZA40X10
-JUUFMGVTF;"4FSJFTWBSJTUPSTBSFTIJQQFETUBOEBSEJOCVMLQBDL
XJUITUSBJHIUMFBETBOEMFBETQBDJOHPVUMJOFEJOUIF1BDLBHF
%JNFOTJPOTTFDUJPOPGUIJTEBUBTIFFU$POUBDUZPVS-JUUFMGVTF
sales representative to discuss non-standard options.
Crimped lead ZA Series varistors are supplied standard in tape and
reel, denoted with "ZT."
;$TUZMFJTTVQQMJFEJOCVMLPOMZ
"ZU" style is supplied in tape and reel only.
'PSDSJNQFEMFBETXJUIPVUUSJNNJOHBOEBOZWBSJUJPOTPUIFSUIBOUIBU
EFTDSJCFEBCPWFQMFBTFDPOUBDU-JUUFMGVTF
TAPE & REEL QUANTITIES:
Device Size Voltage Quantity Per Reel
"S" Reel "T" Reel "U" Reel
5mm All 1000 1000 1000
7mm All 1000 1000 1000
10mm All 500 500 500
14mm < 300V 500 500 500
20mm < 300V 500 500 400
'PSTUBOEBSEQBSUTVTFUIFBASE PART designator only.
'PSQBSUTXJUIOPOTUBOEBSEPQUJPOTTVDIBTBEEJUJPOBMGPSNQBDLBHJOH
and lead space options), use BASE PART + OPTION CODE.
OPTION CODE items are subject to availability and minimum order
SFRVJSFNFOUT1MFBTFDPOUBDUB-JUUFMGVTFQSPEVDUTSFQSFTFOUBUJWFGPS
additional information or questions
Lead–free / RoHS Designator:
'PS-FBEoGSFFBOE3P)4DPNQMJBOUQBSUTBEE1BGUFSUIF#"4&
1"35OVNCFSBOECFGPSFBOZPUIFS015*0/$0%&
BASE PART CODES: OPTION CODES:
Standard Model
with Option Order As
7;"9 V18ZA40P9
Standard Model Order As
V18ZA40 V18ZA40X2855
Standard Model Order As
V18ZA40 V18ZA40P
X10:..-&"%41"$*/(015*0/
'PSNNMFBETQBDJOHBWBJMBCMFPONN
diameter models only), append standard model
#"4&1"35OVNCFSXJUI9&YBNQMF
X2855:/JDLFM#BSSJFS$0"5&%8*3&015*0/
"MMTUBOEBSEQBSUTVTF5JOo$PBUFE$PQQFSXJSF/JDLFM
Barrier Coated wire is available as an option, consisting
PG$PQQFSXJSFXJUIBnBTIJOHPG/JDLFMGPMMPXFECZ
a top coating of Tin. To order append standard model
#"4&1"35OVNCFSXJUI9&YBNQMF