ZOV Series
High Energy Varistors
Stackpole Electronics, Inc.
Resistive Product Solutions
Description:
ZOV Series of varistors are square shaped components that feature a wide range of surge
current and energy absorption capabilities over an operating voltage range from 60 to 680
Vrms. There are two versions of these varistors.
The standard version is available in 5 model sizes from 23mm to 60mm, with single-pulse
(8/20 us) surge capabilities ranging from 15kA to 80kA. Offered in both block format and
rigid leaded construction, these varistors provide excellent protection against high-energy
transients such as inductively coupled lightning strikes, line switching load surges, and
other transient events where large amounts on current are present.
The second version features a broad range of custom parameters to meet specific over-voltage protection requirements.
Customers are given the opportunity to design the optimum varistor with minimum dimensions to satisfy a custom TVS
application. Available customized parameters are: non-standard AC/DC operating voltages, maximum surge current,
maximum dissipation power and the varistors shape, the dimensions being a function of required electrical parameters
and vice-versa.
Both of these groups are offered in two versions: epoxy coated with rigid terminals and metalized varistor blocks. The
first version is designed to provide secondary surge protection in outdoor and service entrance environments
(distribution panels), in computers and also in industrial applications for motor controls and power supplies for
equipment in oil-drilling, mining and transportation. The second version is intended for applications with special contact
or installation requirements. The electrode finish of these devices is solderable, and can also be used with pressure
contacts for stacking applications..
Features:
Standard Varistor Types
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AC operating voltage (Vrms) from 60V to 680V
DC operating voltage (Vdc) from 85V to 895V
Available either as epoxy coated varistors with rigid
terminals or as metalized varistor blocks
Broad range of current and energy handling
capabilities
Low limiting voltage @ lp/2
+85ºC continuous operating temperature
5 model sizes available 23, 25, 32, 40 and 60 mm
In-house testing according to VDE 0675
UL, CAC, CEDD approved
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Full Custom Parameter Design Varistors
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AC operating voltage range (Vrms) from 60V to 680V
DC operating voltage (Vdc) from 85V to 895V
Indefinite number of sizes of both square and
rectangular shape, the maximum one being 45x90mm
Broad range of current and energy handling capabilities
+85ºC continuous operating temperature
Available customized parameter are: AC/DC operating
voltage, leakage current, clamping voltage, maximum
surge current, energy absorption level, maximum
dissipation power and threshold voltage temperature
coefficient
Available either as epoxy coated varistors with rigid
terminals or as metalized varistor blocks
How to Order
SEI Type
Vrms
Tolerance
Model
Size
Design
ZOV
Code
ZOV
Description
High Energy Varistor
680
Code
J
K
L
M
S
J
Tolerance
5%
10%
15%
20%
Special
60
Size (mm)
23
25
32
40
60
Code
E
M
ME
E
Description
Epoxy coated varistor with rigid terminals
Metalized varistor block
Uncoated block with rigid terminals
Rev Date: 05/19/2010
This specification may be changed at any time without prior notice.
Please confirm technical specifications before you order and/or use.
1
www.seielect.com
marketing@seielect.com
ZOV Series
High Energy Varistors
Stackpole Electronics, Inc.
Resistive Product Solutions
Size Parameters
Metallised Varistor Block
Size
23
25
32
40
60
Lmax
mm
23
23
30
34
43
Lemax
mm
18
20
28
31
39
Size
23
25
32
40
60
Epoxy Coated Varistor Block
Dmax
mm
25
25
35
36.5
48
R±1
mm
18.5
18.5
25.4
25.4
25.4
Hmax
mm
43
43
53
56
66
General Technical Data
Standard Values
Climatic Category
Operating Temperature
Storage Temperature Range
Threshold Voltag Temperature
Isolation Voltage Capability
Response Time
Insulation Resistance
40 / 85 / 56
-40ºC to +85ºC
-40ºC to +125ºC
< +0.05% / ºC
> 2.5kV
< 25 nS
> 1 Gohm
In accordance with CECC 42 000
In accordance with CECC 42 000
In accordance with IEC 60068-1
In accordance with CECC 42 000
Custom Designed Values
40 / 85 / 56
-40ºC to +85ºC
-40ºC to +125ºC
< +0.05% / ºC
> 2.5kV
< 25 nS
> 1 Gohm
Standard Packaging Options / Quantities
Series
Voltage Range
60 - 680
60 - 680
60 - 680
60 - 680
130 - 680
Varistor Sizes
23
25
32
40
60
Varistor Configuration Options (Available on All Sizes)
Epoxy coated with rigid terminals
Non-coated with rigid terminals
Metalized varistor blocks
ZOV
ZOVs will be packaged in resilient polystyrene plastic containers. The quantity per container will depend upon voltage, size and
configuration. Quantities generally range between 50 and 100 pieces per box, contact Stackpole for exact count.
Rev Date: 05/19/2010
This specification may be changed at any time without prior notice.
Please confirm technical specifications before you order and/or use.
2
www.seielect.com
marketing@seielect.com
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