ZVX Series — Low Energy, Low Capacitance SMD Varistors
Description
The ZVX Series are low-energy (0.1 joules) varistor chips, designed specifically for the
protection of I/O line drivers and other sensitive semiconductor gates from the damaging
effects of high voltage, low-energy transients such as ESD events. Unlike other competitive
low-energy varistors, the ZVX Series offers all the protection features of standard varistor
chips, and exceptionally low values of capacitance. In these applications, as the frequency of
data transfer increases, lower capacitance is required to eliminate possible skewing of the
data signals due to capacitive loading.
In most cases, the 1KHz capacitance values of the ZVX Series are less than one half that of
the competition. Further, this series is offered in 0603, 0805 and 1206 sizes, with an
expanded range of voltages from 3V to 38Vdc. The ZVX series offers a circuit design
engineer the greatest range of high-frequency, low-energy SMD varistor chips available in the
marketplace today.
Features
• AC operating voltage (Vrms) from 2V to 30V
• DC operating voltage (Vdc) from 3V to 38V
• Bi-directional, low clamping voltages
• Exceptionally low capacitance ratings
• 1 model sizes available 1206
• +125°C continuous operating temperature
• Dimensional and weight savings on PC board
• AgPd end terminations
• Non-coated chips guarantee excellent flammability rating
Applications
• ESD protection for components sensitive to IEC 1000-4-2,
MIL-STD 883C Method 3015.7 and other industry specifications
• Excellent for I/O line protection, operating at high-speed data
transfer rates, due to very low capacitance values
• Replaces larger surface mount TVS diodes in many
applications
•
General Technical Data
Operating Temperature
Storage Temperature Range
Threshold Voltage Temperature Coefficient
Response Time
-55°C to +125°C
-55°C to +150°C
<-0.05%/°C
< 1 ns
In accordance with CECC 42 000
How to Order
ZVX
SEI Type
4
Vrms
S
Tolerance
1206
Chip Size
400
Surge Current (Amps)
R0
Packaging
Code
S
Tolerance
Special
Size
1206
Code
R0, R1
R2
Description
180mm (7") Plastic Reel
330mm (13") Plastic Reel
Standard Packaging Options / Quantities
Chip Size
1206
Series
Voltage Range (Vrms)
R0
180mm
7"
2 – 14
ZVX
17
20 – 30
1,000
1,000
1,000
R1
180mm
7"
4,000
2,500
2,500
R2
330mm
13"
15,000
14,000
10,000
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ZVX Series — Low Energy, Low Capacitance SMD Varistors
Device Ratings and Dimensions
Part Number
ZVX 2 S 1206 400
ZVX 4 S 1206 400
ZVX 6 S 1206 400
ZVX 8 S 1206 400
ZVX 11 S 1206 400
ZVX 14 S 1206 400
ZVX 17 S 1206 400
ZVX 20 S 1206 400
ZVX 25 S 1206 400
ZVX 30 S 1206 400
V
RMS
(volts)
2
4
6
8
11
14
17
20
25
30
V
DC
(volts)
3.3
5.6
9
12
14
18
22
26
30
38
V
n
(volts)
4.1 - 6.0
7.6 - 9.3
11.0 - 14.0
14.0 - 18.3
16.5 - 20.3
22.9 - 28.0
25.2 - 31.3
31.0 - 38.0
37.0 - 46.9
42.3 - 51.7
V
c
I
c
W
max
P
MAX
I
P
C
TYP
(volts) (amps) (joules) (watts) (amps) (pF)
10.0
1.0
0.1
0.008
40
840
15.5
1.0
0.1
0.008
40
720
20.0
1.0
0.1
0.008
40
620
25.0
1.0
0.1
0.008
40
540
30.0
1.0
0.1
0.008
40
500
40.0
1.0
0.1
0.008
40
250
48.0
1.0
0.1
0.008
40
210
58.0
1.0
0.1
0.008
40
200
65.0
1.0
0.1
0.008
40
180
77.0
1.0
0.1
0.008
40
165
L
TYP
(nH)
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
1.8
L
(mm)
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
3.20 ± 0.30
W
t
MAX
(mm)
(mm)
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
1.60 ± 0.20 1.0
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
42
email: marketing@seielect.com
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