Varistor Products
Radial Lead Varistors > ZA Series
RoHS
ZA Varistor Series
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 V
DC
voltage range of 5.5V to 615V.
Agency Approvals
Agency
Agency File Number
See ZA Series Device Ratings and Specifications
Table for part number and brand information.
Features
compliant option
available. Please see
the device and ratings
specifications table
for more information.
range V
M(AC)RMS
4V to 460V
5.5V to 615V
85ºC ambient
form options
available: 5, 7 10,
,
14, and 20mm
E135010, (+ E75961 for selected parts)
116895E
42201-006
Absolute Maximum Ratings
Continuous
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
)
DC Voltage Range (V
M(DC)
)
Transients:
TM
ZA Series
4 to 460
5.5 to 615
Units
V
V
)
μ
50 to 6500
μ
)
0.1 to 52
-55 to +85
-55 to +125
<0.01
2500
1000
V
MΩ
A
J
ºC
ºC
Single Pulse Energy Range (Note 1)
TM
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (a
V
) of Clamping Voltage (V
C
) at Specified Test Current
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.
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
125
Revision: February 27, 2009
ZA Varistor Series
ZA Series
hard-wired or printed
circuit board designs
Varistor Products
Radial Lead Varistors > ZA Series
ZA Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Transient
Model
Size V
RMS
Disc
Dia.
(mm)
V
M(AC)
5
7
10
5
7
10
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
20
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
7
(V)
4
4
4
6
6
6
10
10
10
10
10
14
14
14
14
14
17
17
17
17
17
20
20
20
20
21
23
25
25
25
25
25
30
30
30
30
30
35
35
35
35
35
40
40
22
22
22
22
22
26
26
26
26
27
31
31
31
31
31
31
38
38
38
38
38
45
45
45
45
45
56
56
126
Revision: February 27, 2009
Specifications (25°C)
Lead–free
and RoHS Compliant
Models
Standard
Models
V
DC
V
M(DC)
(V)
5.5
5.5
5.5
8
8
8
14
14
14
14
14
18
18
18
18
Part
Number
V8ZA05P
V8ZA1P
V8ZA2P
V12ZA05P
V12ZA1P
V12ZA2P
V18ZA05P
V18ZA1P
V18ZA2P
V18ZA3P
V18ZA40P
V22ZA05P
V22ZA1P
V22ZA2P
V22ZA3P
V24ZA50P
V27ZA05P
V27ZA1P
V27ZA2P
V27ZA4P
V27ZA60P
V33ZA05P
V33ZA1P
V33ZA2P
V33ZA5P
V33ZA70P
V36ZA80P
V39ZA05P
V39ZA1P
V39ZA3P
V39ZA6P
V39ZA20P
V47ZA05P
V47ZA1P
V47ZA3P
V47ZA7P
V47ZA20P
V56ZA05P
V56ZA2P
V56ZA3P
V56ZA8P
V56ZA20P
V68ZA05P
V68ZA2P
ZA Varistor Series
Branding
PZ08
P08Z1
P08Z2
PZ12
P12Z1
P12Z2
PZ18
P18Z1
P18Z2
P18Z3
P18Z40
PZ22
P22Z1
P22Z2
P22Z3
P24Z50
PZ27
P27Z1
P27Z2
P27Z4
P27Z60
PZ33
P33Z1
P33Z2
P33Z5
P33Z70
P36Z80
PZ39
P39Z1
P39Z3
P39Z6
P39Z20
PZ47
P47Z1
P47Z3
P47Z7
P47Z20
PZ56
P56Z2
P56Z3
P56Z8
P56Z20
PZ68
P68Z2
Part
Number
V8ZA05
V8ZA1
V8ZA2
V12ZA05
V12ZA1
V12ZA2
V18ZA05
V18ZA1
V18ZA2
V18ZA3
V18ZA40
V22ZA05
V22ZA1
V22ZA2
V22ZA3
V24ZA50
V27ZA05
V27ZA1
V27ZA2
V27ZA4
V27ZA60
V33ZA05
V33ZA1
V33ZA2
V33ZA5
V33ZA70
V36ZA80
V39ZA05
V39ZA1
V39ZA3
V39ZA6
V39ZA20
V47ZA05
V47ZA1
V47ZA3
V47ZA7
V47ZA20
V56ZA05
V56ZA2
V56ZA3
V56ZA8
V56ZA20
V68ZA05
V68ZA2
Branding
Z08
08Z1
08Z2
Z12
12Z1
12Z2
Z18
18Z1
18Z2
18Z3
18Z40
Z22
22Z1
22Z2
22Z3
24Z50
Z27
27Z1
27Z2
27Z4
27Z60
Z33
33Z1
33Z2
33Z5
33Z70
36Z80
Z39
39Z1
39Z3
39Z6
39Z20
Z47
47Z1
47Z3
47Z7
47Z20
Z56
56Z2
56Z3
56Z8
56Z20
Z68
68Z2
Typical
Maximum
Capaci-
Varistor Voltage at
Clamping
Peak
tance
1mA
Energy 10
Voltage
Current
f
=
DC Test Current
x 1000μs
8 x 20μs
8 x 20μs
1MHz
V
NOM
V
NOM
W
TM
I
TM
I
PK
C
V
C
Min
Max
(J)
(A)
(V)
(V)
(V) (A)
(pF)
0.1
50
6
11
30
1
2000
0.4
100
6
11
22 2.5
4190
0.8
250
6
11
20
5
7000
0.14
50
9
16
37
1
1700
0.6
100
9
16
34 2.5
3350
1.2
250
9
16
30
5
6100
0.17
100
14.4
21.6
36
1
1400
0.8
250
14.4
21.6
36 2.5
2700
1.5
500
14.4
21.6
36
5
5300
3.5
1000
14.4
21.6
36
10 18870
14.4
2000
21.6
37
20 22000
0.2
0.9
2
4
2)
0.25
1
2.5
5
2)
0.3
1.2
3
6
2)
2)
0.3
1.2
3
7
.2
20
0.4
1.8
4.5
8.8
23
0.5
2.3
5.5
10
30
0.6
3
100
250
500
1000
2000
100
250
500
1000
2000
100
250
500
1000
2000
2000
100
250
500
1000
2000
100
250
500
1000
2000
100
250
500
1000
2000
100
250
18.7
18.7
18.7
18.7
19.2
23
23
23
23
3)
29.5
29.5
29.5
29.5
29.5
26
26
26
26
26
31.1
31.1
31.1
31.1
31.1
38
36.5
36.5
36.5
36.5
40
46
43
43
43
43
55
52
52
52
52
66
62
62
62
62
80
75
43
43
43
43
43
53
53
53
53
50
65
65
65
65
58
63
79
79
76
76
76
93
93
93
93
93
110
110
110
110
110
135
135
1
2.5
5
10
20
1
2.5
5
10
20
1
2.5
5
10
20
20
1
2.5
5
10
20
1
2.5
5
10
20
1
2.5
5
10
20
1
2.5
1220
2375
4500
14730
18000
920
1875
3850
11480
13000
790
1620
3495
9290
13000
12000
675
1350
3100
7000
12000
585
1245
2590
6270
11000
500
1035
2150
4840
10000
400
910
3)
35
35
35
35
35
42
42
42
42
42
50
50
50
50
50
61
61
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
ZA Series Ratings & Specifications
(Continued...)
Maximum Rating (85°C)
Continuous
Transient
Model
Size V
RMS
Disc
Dia.
(mm)
V
M(AC)
10
14
20
5
7
10
14
5
7
10
14
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
5
5
5
5
5
5
5
5
5
5
5
5
(V)
40
40
40
50
50
50
50
60
60
60
60
75
75
75
75
75
92
95
95
95
95
110
115
115
115
115
130
140
150
175
210
230
250
275
300
385
420
440
460
V
DC
V
M(DC)
(V)
56
56
56
68
68
68
68
81
81
81
81
102
102
102
102
102
127
127
127
127
127
153
153
153
153
153
170
180
200
225
275
300
330
369
385
505
560
585
615
Specifications (25°C)
Lead–free
and RoHS Compliant
Models
Standard
Models
Part
Number
V68ZA3P
V68ZA10P
V68ZA20P
V82ZA05P
V82ZA2P
V82ZA4P
V82ZA12P
V100ZA05P
V100ZA3P
V100ZA4P
V100ZA15P
V120ZA05P
V120ZA1P
V120ZA4P
V120ZA6P
V120ZA20P
V150ZA05P
V150ZA1P
V150ZA4P
V150ZA8P
V150ZA20P
V180ZA05P
V180ZA1P
V180ZA5P
V180ZA10P
V180ZA20P
V205ZA05P
V220ZA05P
V240ZA05P
V270ZA05P
V330ZA05P
V360ZA05P
V390ZA05P
V430ZA05P
V470ZA05P
V620ZA05P
V680ZA05P
V715ZA05P
V750ZA05P
Branding
P68Z3
P68Z10
P68Z20
PZ82
P82Z2
P82Z4
P82Z12
PZ100
P100Z
P100Z4
P100Z15
PZ120
P120Z
P120Z4
P120Z6
P120Z20
PZ150
PZ051
P150Z4
P150Z8
P150Z20
PZ180
P180Z
P180Z5
P180Z10
P180Z20
PZ205
PZ220
PZ240
PZ270
PZ330
PZ360
PZ390
PZ430
PZ470
PZ620
PZ680
PZ715
PZ750
Part
Number
V68ZA3
V68ZA10
V68ZA20
V82ZA05
V82ZA2
V82ZA4
V82ZA12
V100ZA05
V100ZA3
V100ZA4
V100ZA15
V120ZA05
V120ZA1
V120ZA4
V120ZA6
V120ZA20
V150ZA05
V150ZA1
V150ZA4
V150ZA8
V150ZA20
V180ZA05
V180ZA1
V180ZA5
V180ZA10
V180ZA20
V205ZA05
V220ZA05
V240ZA05
V270ZA05
V330ZA05
V360ZA05
V390ZA05
V430ZA05
V470ZA05
V620ZA05
V680ZA05
V715ZA05
V750ZA05
Branding
68Z3
68Z10
68Z20
Z82
82Z2
82Z4
82Z12
Z100
100Z
100Z4
100Z15
Z120
120Z
120Z4
120Z6
120Z20
Z150
Z051
150Z4
150Z8
150Z20
Z180
180Z
180Z5
180Z10
180Z20
Z205
Z220
Z240
Z270
Z330
Z360
Z390
Z430
Z470
Z620
Z680
Z715
Z750
Typical
Maximum
Capaci-
Varistor Voltage at
Clamping
Peak
tance
1mA
Energy 10
Voltage
Current
f
=
DC Test Current
x 1000μs
8 x 20μs
8 x 20μs
1MHz
V
NOM
V
NOM
W
TM
I
TM
I
PK
C
V
C
Min
Max
(J)
(A)
(V)
(V)
(V) (A)
(pF)
6.5
500
61
75
135
5
1850
13
1000
61
75
135 10
3870
33
2000
61
75
135 20
9000
2
400
73
97
135
5
355
4
1200
73
91
135 10
700
8
2500
73
91
135 25
1485
15
4500
73
91
145 50
3380
2.5
400
90
117
165
5
310
5
1200
90
110
165 10
600
10
2500
90
110
165 25
1200
20
4500
90
110
175 50
2900
3
400
108
138
205
5
250
6
1200
108
132
205 10
515
12
2500
108
132
200 25
1100
22
4500
108
132
210 50
2450
33
6500
108
132
210 100 5000
4
400
135
173
250
5
190
8
1200
135
165
250 10
460
15
2500
135
165
250 25
860
20
4500
135
165
250 50
1910
45
6500
135
165
250 100 3500
5
400
162
207
295
5
100
10
1200
162
198
300 10
320
18
2500
162
198
300 25
465
35
4500
162
198
300 50
1190
52
6500
162
198
300 100 2400
5.5
400
184
226
340
5
100
6
400
198
253
360
5
95
7
400
216
264
395
5
90
7
.5
400
243
311
455
5
75
9
400
297
380
540
5
70
9.5
400
324
396
595
5
60
10
400
351
449
650
5
80
11
400
387
495
710
5
75
12
400
420
517
775
5
70
13
400
558
682
1025 5
45
14
400
610
748
1120 5
40
15.5
400
643
787
1180 5
35
17
400
675
825
1240 5
30
3. 10mA DC test current.
4. Also rated to withstand 24V for 5 minutes.
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
127
Revision: February 27, 2009
ZA Varistor Series
ZA Series
Varistor Products
Radial Lead Varistors > ZA Series
Power Dissipation Ratings
100
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
90
100
90
PERCENT OF RATED VALUE
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100
110
120
130
140
150
50
10
O
1
T
T
1
T
2
TIME
Figure 1
AMBIENT TEMPERATURE (
o
C)
Figure 2
0
1
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
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.
T
1
= Rise Time = 1.25 x T
T
2
= Decay Time
Example
μ
8μs = T
1
= Rise Time
20μs = T
2
= Decay Time
Maximum Clamping Voltage for 5mm Parts
V8ZA05(P) - V68ZA05(P)
600
500
400
300
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
8 TO 68V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V82ZA05(P) - V33ZA05(P)
2000
V330ZA05(P)
V270ZA05(P)
V240ZA05(P)
V220ZA05(P)
V205ZA05(P)
V180ZA05(P)
V150ZA05(P)
V120ZA05(P)
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
82 TO 330V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
MAXIMUM PEAK VOLTS (V)
200
MAXIMUM PEAK VOLTS (V)
1000
100
90
80
70
60
50
40
500
V68ZA05(P)
V56ZA05(P)
V47ZA05(P)
V39ZA05(P)
V33ZA05(P)
V27ZA05(P)
30 V22ZA05(P)
V18ZA05(P)
20 V12ZA05(P)
V8ZA05(P)
10
10
-3
10
-2
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
200
)
5(P
A0
Z
)
00
(P
V1
05
ZA
2
V8
Figure 3
Figure 4
100
0.0001
0.001
0.01
0.1
1
10
PEAK AMPERES (A)
100
1000
V360ZA05(P) - V750ZA05(P)
3000
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
360 TO 750V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
2000
MAXIMUM PEAK VOLTS (V)
1000
V750ZA05(P)
V715ZA05(P)
V680ZA05(P)
V620ZA05(P)
V470ZA05(P)
V430ZA05(P)
V390ZA05(P)
V360ZA05(P)
500
Figure 5
0.0001
0.001
0.01
0.1
1
10
PEAK AMPERES (A)
100
1000
ZA Varistor Series
128
Revision: February 27, 2009
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
Maximum Clamping Voltage for 7mm Parts
V8ZA1(P) - V68ZA2(P)
500
400
300
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
8 TO 68V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V82ZA2(P) - V180ZA1(P)
4,000
3,000
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
82 TO 180V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
200
100
90
80 V68ZA2(P)
70 V56ZA2(P)
60 V47ZA1(P)
50 V39ZA1(P)
40 V33ZA1(P)
V27ZA1(P)
30 V22ZA1(P)
V18ZA1(P)
20 V12ZA1(P)
V8ZA1(P)
10
10
-3
10
-2
1,000
900
800
700
600
500
400
300
200
V180ZA1(P)
V150ZA1(P)
V120ZA1(P)
V100ZA3(P)
V82ZA2(P)
Figure 6
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
100
10
-3
10
-2
10
-1
Figure 7
10
0
10
1
10
2
PEAK AMPERES (A)
10
3
10
4
Maximum Clamping Voltage for 10mm Parts
V8ZA2(P) - V68ZA3(P)
500
400
300
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
8 TO 68V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V82ZA4(P) - V180ZA5(P)
4,000
3,000
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
82 TO 180V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
200
100
90
80
70
60
50
40
V68ZA3(P)
V56ZA3(P)
V47ZA3(P)
V39ZA3(P)
V33ZA2(P)
V27ZA2(P)
30 V22ZA2(P)
V18ZA2(P)
20
V12ZA2(P)
V8ZA2(P)
10
10
-3
10
-2
1,000
900
800
700
600
500
400
300
200
V180ZA5(P)
V150ZA4(P)
V120ZA4(P)
V100ZA4(P)
V82ZA4(P)
Figure 8
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
100
10
-3
10
-2
10
-1
Figure 9
10
0
10
1
10
2
PEAK AMPERES (A)
10
3
10
4
Maximum Clamping Voltage for 14mm Parts
V18ZA3(P) - V68ZA10(P)
600
500
400
300
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
18 TO 68V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V82ZA12(P) - V180ZA10(P)
4,000
3,000
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
82 TO 180V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
MAXIMUM PEAK VOLTS (V)
200
MAXIMUM PEAK VOLTS (V)
100
90
80
70
60
50
40
V68ZA10(P)
V56ZA8(P)
V47ZA7(P)
V39ZA6(P)
V33ZA5(P)
V27ZA4(P)
30 V22ZA3(P)
V18ZA3(P)
20
10
-3
10
-2
1,000
900
800
700
600
500
400
300
200
V180ZA10(P)
V150ZA8(P)
V120ZA6(P)
V100ZA15(P)
V82ZA12(P)
Figure 10
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
100
10
-3
10
-2
10
-1
Figure 11
10
0
10
1
10
2
PEAK AMPERES (A)
10
3
10
4
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
129
Revision: February 27, 2009
ZA Varistor Series
ZA Series
