67
w w w . l i t t e l f u s e . c o m
2
V
ARIST
OR
PR
ODUCTS
Varistor Products
Low to Medum Voltage, Radial Lead
ZA Varistor Series
The ZA Series of transient voltage surge suppressors are radial-lead
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
Lead-free and RoHS compliant option available. Please see the
device and ratings specifications table for more information.
Wide Operating Voltage Range VM(AC)RMS . . . . . . . . . .4V to 460V
DC Voltage Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5V to 615V
No Derating Up to 85
o
C Ambient
5 Model Sizes Available . . . . . 5, 7, 10, 14, and 20mm
Radial-Lead Package for Hard-Wired or Printed Circuit
Board Designs
Available in Tape and Reel or Bulk Pack
Standard Lead Form Options
AGENCY APPROVALS FOR STANDARD PARTS:
Recognized under the components program of Underwriters Laboratories.
CECC and VDE certified.
Agency File Numbers: UL E135010, UL E75961, VDE 116895E, CECC
42201.
AGENCY APPROVALS FOR LEAD-FREE AND RoHS COMPLI-
ANT PARTS:
Selected parts recognized under the components program of Underwriters
Laboratories and other parts pending approval. All parts CECC and VDE cer-
tified. See details below.
Agency File Numbers: UL E135010 (pending approval), UL E75961
(selected parts recognized), VDE 116895E, CECC 42201-006.
V
D
E
NEW LEAD-FREE AND
RoHS COMPLIANT PARTS
AVAILABLE
Pb
RoHS
68
w w w . l i t t e l f u s e . c o m
Varistor Products
ZA Varistor Series
Low to Medum Voltage, Radial Lead
Absolute Maximum Ratings
For ratings of individual members of a series, see Device Ratings and Specifications chart.
Continuous:
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 460
V
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 to 615
V
Transient:
Peak Pulse Current (ITM)
For 8/20s Current Wave (See Figure 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 to 6500
A
Single Pulse Energy Range (Note 1)
For 10/1000s Current Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 to 52
J
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to85
o
C
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to125
o
C
Temperature Coefficient ( V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01
%/
o
C
Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500
V
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000
M
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.
Device Ratings and Specifications
(Note 1)
ZA SERIES UNITS
PART
NUMBER
MODEL
SIZE
DISC
DIA. (mm)
BRANDING
MAXIMUM RATING (85
o
C)
SPECIFICATIONS (25
o
C)
CONTINUOUS
TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
MAXIMUM
CLAMPING
VOLTAGE
8 x 20
s
TYPICAL
CAPACI-
TANCE
f = 1MHz
V
RMS
V
DC
ENERGY 10
x 1000
s
PEAK
CURRENT
8 x 20
s
V
M(AC)
V
M(DC)
W
TM
I
TM
V
NOM
MIN
V
NOM
MAX
V
C
I
PK
C
(V)
(V)
(J)
(A)
(V)
(V)
(A)
(pF)
V8ZA05
5
Z08
4
5.5
0.1
50
6
11
30
1
1400
V8ZA1
7
08Z1
4
5.5
0.4
100
6
11
22
2.5
3000
V8ZA2
10
08Z2
4
5.5
0.8
250
6
11
20
5
7500
V12ZA05
5
Z12
6
8
0.14
50
9
16
37
1
1200
V12ZA1
7
12Z1
6
8
0.6
100
9
16
34
2.5
2500
V12ZA2
10
12Z2
6
8
1.2
250
9
16
30
5
6000
V18ZA05
5
Z18
10
14
0.17
100
14.4
21.6
36
1
1000
V18ZA1
7
18Z1
10
14
0.8
250
14.4
21.6
36
2.5
2000
V18ZA2
10
18Z2
10
14
1.5
500
14.4
21.6
36
5
5000
V18ZA3
14
18Z3
10
14
3.5
1000
14.4
21.6
36
10
11000
V18ZA40
20
18Z40
10
14
80 (Note 2)
2000
14.4
(Note 3)
21.6
37
20
22000
V22ZA05
5
Z22
14
18
0.2
100
18.7
26
43
1
800
V22ZA1
7
22Z1
14
18
0.9
250
18.7
26
43
2.5
1600
V22ZA2
10
22Z2
14
18
2
500
18.7
26
43
5
4000
V22ZA3
14
22Z3
14
18
4
1000
18.7
26
43
10
9000
V24ZA50
20
24Z50
14
18
(Note 4)
100 (Note 2)
2000
19.2
(Note 3)
26
43
20
18000
V27ZA05
5
Z27
17
22
0.25
100
23
31.1
53
1
600
V27ZA1
7
27Z1
17
22
1 250
23
31.1
53
2.5
1300
V27ZA2
10
27Z2
17
22
2.5
500
23
31.1
53
5
3000
V27ZA4
14
27Z4
17
22
5
1000
23
31.1
53
10
7000
V27ZA60
20
27Z60
17
22
120 (Note 2)
2000
23
(Note 3)
31.1
50
20
13000
PART
NUMBER
BRANDING
V8ZA05P
PZ08
V8ZA1P
P08Z1
V8ZA2P
P08Z2
V12ZA05P
PZ12
V12ZA1P
P12Z1
V12ZA2P
P12Z2
V18ZA05P
PZ18
V18ZA1P
P18Z1
V18ZA2P
P18Z2
V18ZA3P
P18Z3
V18ZA40P
P18Z40
V22ZA05P
PZ22
V22ZA1P
P22Z1
V22ZA2P
P22Z2
V22ZA3P
P22Z3
V24ZA50P
P24Z50
V27ZA05P
PZ27
V27ZA1P
P27Z1
V27ZA2P
P27Z2
V27ZA4P
P27Z4
V27ZA60P
P27Z60
LEAD-FREE
AND RoHS
COMPLIANT
MODELS
STANDARD
MODELS
Pb
RoHS
See Page 70 for NOTES
Pb
RoHS
69
w w w . l i t t e l f u s e . c o m
2
V
ARIST
OR
PR
ODUCTS
Varistor Products
Low to Medum Voltage, Radial Lead
ZA Varistor Series
Device Ratings and Specifications
(Note 1) (Continued)
V33ZA05
5
Z33 20
26
0.3
100
29.5
38
65
1
500
V33ZA1
7
33Z1 20
26
1.2
250
29.5
36.5
65
2.5
1100
V33ZA2
10
33Z2 20
26
3
500
29.5
36.5
65
5
2700
V33ZA5
14
33Z5
20
26
6
1000
29.5
36.5
65
10
6000
V33ZA70
20
33Z70
21
27
150 (Note 2)
2000
29.5
(Note 3)
36.5
58
20
13000
V36ZA80
20
36Z80
23
31
160 (Note 2)
2000
32
(Note 3)
40
63
20
12000
V39ZA05
5
Z39
25
31
0.3
100
35
46
79
1
500
V39ZA1
7
39Z1
25
31
1.2
250
35
43
79
2.5
1100
V39ZA3
10
39Z3
25
31
3
500
35
43
76
5
2700
V39ZA6
14
39Z6
25
31
6
1000
35
43
76
10
6000
V39ZA20
20
39Z20
25
31
20
2000
35
43
76
20
12000
V47ZA05
5
Z47
30
38
0.4
100
42
55
93
1
400
V47ZA1
7
47Z1
30
38
1.8
250
42
52
93
2.5
800
V47ZA3
10
47Z3
30
38
4.5
500
42
52
93
5
2000
V47ZA7
14
47Z7
30
38
8.8
1000
42
52
93
10
4500
V47ZA20
20
47Z20
30
38
23
2000
42
52
93
20
11000
V56ZA05
5
Z56
35
45
0.5
100
50
66
110
1
360
V56ZA2
7
56Z2
35
45
2.3
250
50
62
110
2.5
700
V56ZA3
10
56Z3
35
45
5.5
500
50
62
110
5
1800
V56ZA8
14
56Z8
35
45
10
1000
50
62
110
10
3900
V56ZA20
20
56Z20
35
45
30
2000
50
62
110
20
10000
V68ZA05
5
Z68
40
56
0.6
100
61
80
135
1
300
V68ZA2
7
68Z2
40
56
3
250
61
75
135
2.5
600
V68ZA3
10
68Z3
40
56
6.5
500
61
75
135
5
1500
V68ZA10
14
68Z10
40
56
13
1000
61
75
135
10
3300
V68ZA20
20
68Z20
40
56
33
2000
61
75
135
20
10000
V82ZA05
5
Z82
50
68
2
400
73
97
135
5
240
V82ZA2
7
82Z2
50
68
4
1200
73
91
135
10
500
V82ZA4
10
82Z4
50
68
8
2500
73
91
135
25
1100
V82ZA12
14
82Z12
50
68
15
4500
73
91
145
50
2500
V100ZA05
5
Z100
60
81
2.5
400
90
117
165
5
180
V100ZA3
7
100Z
60
81
5
1200
90
110
165
10
400
V100ZA4
10
100Z4
60
81
10
2500
90
110
165
25
900
V100ZA15
14
100Z15
60
81
20
4500
90
110
175
50
2000
PART
NUMBER
MODEL
SIZE
DISC
DIA. (mm)
BRANDING
MAXIMUM RATING (85
o
C)
SPECIFICATIONS (25
o
C)
CONTINUOUS
TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
MAXIMUM
CLAMPING
VOLTAGE
8 x 20
s
TYPICAL
CAPACI-
TANCE
f = 1MHz
V
RMS
V
DC
ENERGY 10
x 1000
s
PEAK
CURRENT
8 x 20
s
V
M(AC)
V
M(DC)
W
TM
I
TM
V
NOM
MIN
V
NOM
MAX
V
C
I
PK
C
(V)
(V)
(J)
(A)
(V)
(V)
(A)
(pF)
V33ZA05P
PZ33
V33ZA1P
P33Z1
V33ZA2P
P33Z2
V33ZA5P
P33Z5
V33ZA70P
P33Z70
V36ZA80P
P36Z80
V39ZA05P
PZ39
V39ZA1P
P39Z1
V39ZA3P
P39Z3
V39ZA6P
P39Z6
V39ZA20P
P39Z20
V47ZA05P
PZ47
V47ZA1P
P47Z1
V47ZA3P
P47Z3
V47ZA7P
P47Z7
V47ZA20P
P47Z20
V56ZA05P
PZ56
V56ZA2P
P56Z2
V56ZA3P
P56Z3
V56ZA8P
P56Z8
V56ZA20P
P56Z20
V68ZA05P
PZ68
V68ZA2P
P68Z2
V68ZA3P
P68Z3
V68ZA10P
P68Z10
V68ZA20P
P68Z20
V82ZA05P
PZ82
V82ZA2P
P82Z2
V82ZA4P
P82Z4
V82ZA12P
P82Z12
V100ZA05P
PZ100
V100ZA3P
P100Z
V100ZA4P
P100Z4
V100ZA15P
P100Z15
PART
NUMBER
BRANDING
LEAD-FREE
AND RoHS
COMPLIANT
MODELS
STANDARD
MODELS
Pb
RoHS
See Page 70 for NOTES
Pb
RoHS
70
w w w . l i t t e l f u s e . c o m
Varistor Products
ZA Varistor Series
Low to Medum Voltage, Radial Lead
Device Ratings and Specifications
(Note1) (Continued)
V120ZA05
5
Z120
75
102
3
400
108
138
205
5
140
V120ZA1
7
120Z
75
102
6
1200
108
132
205
10
300
V120ZA4
10
120Z4
75
102
12
2500
108
132
200
25
750
V120ZA6
14
120Z6
75
102
22
4500
108
132
210
50
1700
V120ZA20
20
120Z20
75
102
33
6500
108
132
210
100
1500
V150ZA05
5
Z150
92
127
4
400
135
173
250
5
120
V150ZA1
7
Z051
95
127
8
1200
135
165
250
10
250
V150ZA4
10
150Z4
95
127
15
2500
135
165
250
25
600
V150ZA8
14
150Z8
95
127
20
4500
135
165
250
50
1400
V150ZA20
20
150Z20
95
127
45
6500
135
165
250
100
1000
V180ZA05
5
Z180
110
153
5
400
162
207
295
5
100
V180ZA1
7
180Z
115
153
10
1200
162
198
300
10
200
V180ZA5
10
180Z5
115
153
18
2500
162
198
300
25
500
V180ZA10
14
180Z10
115
153
35
4500
162
198
300
50
1100
V180ZA20
20
180Z20
115
153
52
6500
162
198
300
100
2400
V205ZA05
5
Z205
130
170
5.5
400
184
226
340
5
100
V220ZA05
5
Z220
140
180
6
400
198
253
360
5
90
V240ZA05
5
Z240
150
200
7
400
216
264
395
5
80
V270ZA05
5
Z270
175
225
7.5
400
243
311
455
5
70
V330ZA05
5
Z330
210
275
9
400
297
380
540
5
60
V360ZA05
5
Z360
230
300
9.5
400
324
396
595
5
55
V390ZA05
5
Z390
250
330
10
400
351
449
650
5
50
V430ZA05
5
Z430
275
369
11
400
387
495
710
5
45
V470ZA05
5
Z470
300
385
12
400
420
517
775
5
35
V620ZA05
5
Z620
385
505
13
400
558
682
1025
5
33
V680ZA05
5
Z680
420
560
14
400
610
748
1120
5
32
V715ZA05
5
Z715
440
585
15.5
400
643
787
1180
5
31
V750ZA05
5
Z750
460
615
17
400
675
825
1240
5
30
NOTES:
1. Average power dissipation of transients not to exceed 0.2W, 0.25W, 0.4W, 0.6W or 1W for model sizes 5mm, 7mm, 10mm, 14mm and 20mm,
respectively.
2. Energy rating for impulse duration of 30ms minimum to one half of peak current (auto load dump).
3. 10mA DC test current.
4. Also rated to withstand 24V for 5 minutes.
5. Higher voltages available, contact Littelfuse.
Recognized to UL1449, "Transient Voltage Surge Suppressors" File #E75961.
PART
NUMBER
MODEL
SIZE
DISC
DIA. (mm)
BRANDING
MAXIMUM RATING (85
o
C)
SPECIFICATIONS (25
o
C)
CONTINUOUS
TRANSIENT
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
MAXIMUM
CLAMPING
VOLTAGE
8 x 20
s
TYPICAL
CAPACI-
TANCE
f = 1MHz
V
RMS
V
DC
ENERGY 10
x 1000
s
PEAK
CURRENT
8 x 20
s
V
M(AC)
V
M(DC)
W
TM
I
TM
V
NOM
MIN
V
NOM
MAX
V
C
I
PK
C
(V)
(V)
(J)
(A)
(V)
(V)
(A)
(pF)
V120ZA05
P
P
Z120
V120ZA1
P
P
120Z
V120ZA4
P
P
120Z4
V120ZA6
P
P
120Z6
V120ZA20
P
P
120Z20
V150ZA05
P
P
Z150
V150ZA1
P
P
Z051
V150ZA4
P
P
150Z4
V150ZA8
P
P
150Z8
V150ZA20
P
P
150Z20
V180ZA05
P
P
Z180
V180ZA1
P
P
180Z
V180ZA5
P
P
180Z5
V180ZA10
P
P
180Z10
V180ZA20
P
P
180Z20
V205ZA05
P
P
Z205
V220ZA05
P
P
Z220
V240ZA05
P
P
Z240
V270ZA05
P
P
Z270
V330ZA05
P
P
Z330
V360ZA05
P
P
Z360
V390ZA05
P
P
Z390
V430ZA05
P
P
Z430
V470ZA05
P
P
Z470
V620ZA05
P
P
Z620
V680ZA05
P
P
Z680
V715ZA05
P
P
Z715
V750ZA05
P
P
Z750
PART
NUMBER
BRANDING
LEAD-FREE
AND RoHS
COMPLIANT
MODELS
STANDARD
MODELS
Pb
RoHS
Pb
RoHS
71
w w w . l i t t e l f u s e . c o m
2
V
ARIST
OR
PR
ODUCTS
Varistor Products
Low to Medum Voltage, Radial Lead
ZA Varistor Series
Power Dissipation Ratings
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 and Specifications table for
the specific device. Furthermore, the operating values need to be derated
at high temperatures as shown in Figure 1. 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.
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
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 (
o
C)
PERCENT OF RA
TED
V
ALUE
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK V
ALUE
O
1
= Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T
1
= Virtual Front time = 1.25 t
T
2
= Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20
s Current Waveform:
8
s = T
1
= Virtual Front Time
20
s = T
2
= Virtual Time to Half Value
FIGURE 3. CLAMPING VOLTAGE FOR V8ZA05(P) - V68ZA05(P)
600
500
400
300
200
100
90
80
70
60
50
40
30
20
MAXIMUM PEAK
V
O
L
TS (V)
PEAK AMPERES (A)
10
-2
10
-1
10
0
10
1
10
2
10
3
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
8 TO 68V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
10
V68ZA05(P)
V56ZA05(P)
V47ZA05(P)
V39ZA05(P)
V33ZA05(P)
V27ZA05(P)
V22ZA05(P)
V18ZA05(P)
V12ZA05(P)
V8ZA05(P)
10
-3
FIGURE 4. CLAMPING VOLTAGE FOR V82ZA05(P) - V33ZA05(P)
2000
1000
500
200
MAXIMUM PEAK
V
O
L
TS (V)
PEAK AMPERES (A)
0.01
0.1
1
10
100
1000
100
0.001
0.0001
V100ZA05(P)
V82ZA05(P)
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
82 TO 330V
N(DC)
RATING
T
A
= -55
o
C TO 85
o
C
V330ZA05(P)
V270ZA05(P)
V240ZA05(P)
V220ZA05(P)
V205ZA05(P)
V180ZA05(P)
V150ZA05(P)
V120ZA05(P)
Transient V-I Characteristics Curves
Pb
RoHS
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