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Data Sheet
ZA Series
July 1999 File Number 2184.6
[ /Title
(ZA
Series)
/Sub-
ject
(Radial
Lead
Metal-
Oxide
Varis-
tors for
Low to
Mediu
m Volt-
age
Opera-
tion)
/Autho
r ()
/Key-
words
(Littel-
fuse,
Inc.,
Sup-
pres-
sion
Prod-
ucts,
TVS,
Tran-
sient
Sup-
pres-
sion,
Protec-
tion,
Auto-
motive,
Radial Lead Metal-Oxide Varistors for Low
to Medium Voltage Operation
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
• Recognized as “Protectors for Data Communications and
Fire Alarm Circuits”, UL File #E135010 to Std. 497B
• VDE Certified. License Number 116895E
• Wide Operating Voltage Range VM(AC)RMS . . . . 4V to 460V
• DC Voltage Ratings . . . . . . . . . . . . . . . . . . . 5.5V to 615V
• No Derating Up to 85oC 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
Packaging
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14MM, 20MM
5MM, 7MM, 10MM
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1-800-999-9445 or 1-847-824-1188 | Copyright © Littelfuse, Inc. 1999
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ZA Series
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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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transient:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single Pulse Energy Range (Note 1)
For 10/1000µs Current Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . .
Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) . . . .
Insulation Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZA SERIES
4 to 460
5.5 to 615
50 to 6500
0.1 to 52
-55 to 85
-55 to 125
<0.01
2500
1000
UNITS
V
V
A
J
oC
oC
%/oC
V
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)
VDE Certified. License Number 116895E
ZA Series Varistors are listed under UL File No. E135010 as a UL recognized component.
MAXIMUM RATING (85oC)
CONTINUOUS
TRANSIENT
PART
NUMBER
MODEL
SIZE
DISC
DIA. (mm)
BRAND
VRMS
VDC
PEAK
ENERGY 10 CURRENT
x 1000µs 8 x 20µs
VM(AC) VM(DCD) ataSWhTeMet4U.comITM
(V) (V)
(J)
(A)
V8ZA05
5 Z08
4 5.5
0.1
50
V8ZA1
7 08Z1
4 5.5
0.4
100
V8ZA2
10 08Z2
4 5.5
0.8
250
V12ZA05
5 Z12
6 8 0.14
50
V12ZA1
7 12Z1
6 8 0.6 100
V12ZA2
10 12Z2
6 8 1.2 250
V18ZA05
5 Z18
10 14
0.17
100
V18ZA1
7 18Z1
10 14
0.8
250
V18ZA2
10 18Z2
10 14
1.5
500
V18ZA3
14 18Z3
10 14 3.5 1000
V18ZA40
20 18Z40
10 14 80 (Note 2) 2000
V22ZA05
V22ZA1
V22ZA2
V22ZA3
V24ZA50
V27ZA05
V27ZA1
V27ZA2
V27ZA4
V27ZA60
5 Z22
7 22Z1
10 22Z2
14 22Z3
20 24Z50
5 Z27
7 27Z1
10 27Z2
14 27Z4
20 27Z60
14 18
0.2
100
14 18
0.9
250
14 18
2
500
14 18 4 1000
14 18 100 (Note 2) 2000
(Note 4)
17 22
0.25
100
17 22
1
250
17 22
2.5
500
17 22 5 1000
17 22 120 (Note 2) 2000
SPECIFICATIONS (25oC)
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
VNOM
MIN
VNOM
MAX
(V)
6 11
6 11
6 11
9 16
9 16
9 16
14.4 21.6
14.4 21.6
14.4 21.6
14.4 21.6
14.4
(Note 3)
21.6
18.7 26
18.7 26
18.7 26
18.7 26
19.2
(Note 3)
26
23 31.1
23 31.1
23 31.1
23 31.1
23
(Note 3)
31.1
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
VC IPK
(V) (A)
30 1
22 2.5
20 5
37 1
34 2.5
30 5
36 1
36 2.5
36 5
36 10
37 20
43 1
43 2.5
43 5
43 10
43 20
53 1
53 2.5
53 5
53 10
50 20
TYPICAL
CAPACI-
TANCE
f = 1MHz
C
(pF)
1400
3000
7500
1200
2500
6000
1000
2000
5000
11000
22000
800
1600
4000
9000
18000
600
1300
3000
7000
13000
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ZA Series
Device Ratings and Specifications (Note 1) (Continued)
VDE Certified. License Number 116895E
ZA Series Varistors are listed under UL File No. E135010 as a UL recognized component.
MAXIMUM RATING (85oC)
CONTINUOUS
TRANSIENT
PART
NUMBER
MODEL
SIZE
DISC
DIA. (mm)
BRAND
VRMS
VDC
PEAK
ENERGY 10 CURRENT
x 1000µs 8 x 20µs
VM(AC)
(V)
VM(DC)
(V)
WTM
(J)
ITM
(A)
V33ZA05
5 Z33
20 26
0.3
100
V33ZA1
7 33Z1
20 26
1.2
250
V33ZA2
10 33Z2
20 26
3
500
V33ZA5
14 33Z5
20 26 6 1000
V33ZA70
20 33Z70
21 27 150 (Note 2) 2000
V36ZA80
20 36Z80
23 31 160 (Note 2) 2000
V39ZA05
5 Z39
25 31
0.3
100
V39ZA1
7 39Z1
25 31
1.2
250
V39ZA3
10 39Z3
25 31
3
500
V39ZA6
14 39Z6
25 31
6
1000
V39ZA20
20 39Z20
25 31
20
2000
V47ZA05
5 Z47
30 38
0.4
100
V47ZA1
7 47Z1
30 38
1.8
250
V47ZA3
10 47Z3
30 38 DataSh4.e5et4U.com500
V47ZA7
14 47Z7
30 38 8.8 1000
V47ZA20
20 47Z20
30 38
23
2000
V56ZA05
5 Z56
35 45
0.5
100
V56ZA2
7 56Z2
35 45
2.3
250
V56ZA3
10 56Z3
35 45
5.5
500
V56ZA8
14 56Z8
35 45 10 1000
V56ZA20
20 56Z20
35 45
30
2000
V68ZA05
5 Z68
40 56
0.6
100
V68ZA2
7 68Z2
40 56
3
250
V68ZA3
10 68Z3
40 56
6.5
500
V68ZA10
14 68Z10
40 56
13
1000
V68ZA20
20 68Z20
40 56
33
2000
V82ZA05
5 Z82
50 68
2
400
V82ZA2
7 82Z2
50 68 4 1200
V82ZA4
10 82Z4
50 68 8 2500
V82ZA12
14 82Z12
50 68
15
4500
V100ZA05
5 Z100
60 81
2.5
400
V100ZA3
7 100Z
60 81 5 1200
V100ZA4
10 100Z4
60 81
10
2500
V100ZA15
14 100Z15
60
81
20
4500
SPECIFICATIONS (25oC)
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
VNOM
MIN
VNOM
MAX
(V)
29.5 38
29.5 36.5
29.5 36.5
29.5 36.5
29.5
(Note 3)
36.5
32
(Note 3)
40
35 46
35 43
35 43
35 43
35 43
42 55
42 52
42 52
42 52
42 52
50 66
50 62
50 62
50 62
50 62
61 80
61 75
61 75
61 75
61 75
73 97
73 91
73 91
73 91
90 117
90 110
90 110
90 110
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
VC IPK
(V) (A)
65 1
65 2.5
65 5
65 10
58 20
63 20
79 1
79 2.5
76 5
76 10
76 20
93 1
93 2.5
93 5
93 10
93 20
110 1
110 2.5
110 5
110 10
110 20
135 1
135 2.5
135 5
135 10
135 20
135 5
135 10
135 25
145 50
165 5
165 10
165 25
175 50
TYPICAL
CAPACI-
TANCE
f = 1MHz
C
(pF)
500
1100
2700
6000
13000
12000
500
1100
2700
6000
12000
400
800
2000
4500
11000
360
700
1800
3900
10000
300
600
1500
3300
10000
240
500
1100
2500
180
400
900
2000
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ZA Series
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Device Ratings and Specifications (Note 1) (Continued)
VDE Certified. License Number 116895E
ZA Series Varistors are listed under UL File No. E135010 as a UL recognized component.
MAXIMUM RATING (85oC)
SPECIFICATIONS (25oC)
PART
NUMBER
MODEL
SIZE
DISC
DIA. (mm)
BRAND
CONTINUOUS
VRMS
VDC
TRANSIENT
PEAK
ENERGY 10 CURRENT
x 1000µs 8 x 20µs
VM(AC)
(V)
VM(DC)
(V)
WTM
(J)
ITM
(A)
VARISTOR VOLT-
AGE AT 1mA DC
TEST CURRENT
VNOM
MIN
VNOM
MAX
(V)
MAXIMUM
CLAMPING
VOLTAGE
8 x 20µs
VC IPK
(V) (A)
TYPICAL
CAPACI-
TANCE
f = 1MHz
C
(pF)
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
V150ZA8
10 150Z4
14 150Z8
95 127
95 127
15
20
2500
4500
135 165 250 25 600
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
V205ZA05
V220ZA05
V240ZA05
V270ZA05
V330ZA05
V360ZA05
V390ZA05
V430ZA05
V470ZA05
V620ZA05
20 180Z20
5 Z205
5 Z220
5 Z240
5 Z270
5 Z330
5 Z360
5 Z390
5 Z430
5 Z470
5 Z620
115 153
52
6500
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130 170
5.5
400
140 180
6
400
150 200
7
400
175 225
7.5
400
210 275
9
400
230 300
9.5
400
250 330
10
400
275 369
11
400
300 385
12
400
385 505
13
400
162
198 300 100
2400
184 226 340 5
100
198 253 360 5
90
216 264 395 5
80
243 311 455 5
70
297 380 540 5
60
324 396 595 5
55
351 449 650 5
50
387 495 710 5
45
420 517 775 5
35
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.
Also listed to UL1449, Second Edition, “Transient Voltage Surge Suppressors” File #E75961.
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ZA 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.
1.
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)
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
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100
90
50
10
O1
T
T1
T2
O1 = Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T1 = Virtual Front time = 1.25 t
T2 = Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20µs Current Waveform:
8µs = T1 = Virtual Front Time
20µs = T2 = Virtual Time to Half Value
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TIME
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
Transient V-I Characteristics Curves
600
500
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
400
300
8 TO
TA =
-6585VoNC(DTCO)
RATING
85oC
200
100
90
80
70
60
V68ZA05
V56ZA05
V47ZA05
50 V39ZA05
40
V33ZA05
V27ZA05
30
V22ZA05
V18ZA05
20 V12ZA05
V8ZA05
10
10-3
10-2
10-1
100
101
PEAK AMPERES (A)
102
103
FIGURE 3. CLAMPING VOLTAGE FOR V8ZA05 - V68ZA05
2000
1000
500
V330ZA05
V270ZA05
V240ZA05
V220ZA05
V205ZA05
V180ZA05
V150ZA05
V120ZA05
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
82
TA
T=O-5353o0CVTNO(D8C5) oRCATING
200 V1V0802ZZAA0055
100
0.0001 0.001
0.01 0.1 1 10
PEAK AMPERES (A)
100 1000
FIGURE 4. CLAMPING VOLTAGE FOR V82ZA05 - V330ZA05
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