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RECENT NEWS
published: December 11, 2021.
DEC. 11, 2021.
The Widest Choice of SMD Varistors!

Živić offers the widest choice of superior SMD varistirs which differ according to:

Technology they are produced
Technology
Z
Z+
ZT
ZE
D
A
P
Multi-layer ceramics

Plastics encapsulaton








Application they are designed for
Application
Z
Z+
ZT
ZE
D
A
P
General purpose



Telecom






Automotive





Protection against ESD








Network they are suitable for - DV, AC or both
Network
Z
Z+
ZT
ZE
D
A
P
DC
AC





Available SMD sizes
Size Code
Dimensions [mm]
Z
Z+
ZT
ZE
D
A
P
0201
0.8×0.3






0402
1.0×0.5





0603
1.6×0.8





0805
2.0×1.25




1206
3.2×1.6


1210
3.2×2.5


1812
4.5×3.2


2220
5.7×5.0



3220
8.1×5.3




4032
10.6×8.3






6555
16.6×14.0






10083
25.6×21.0








Materials used for the terminals
Terminals
Z
Z+
ZT
ZE
D
A
P
Ni-barrrier

Sn plated cooper sheet








Operating temperature range they are designed for
Range
Z
Z+
ZT
ZE
D
A
P
-40 to +85°C



-55 to +125°C






Voltage range they cover
Series
Z
Z+
ZT
ZE
D
A
P
Vdc range [V]
5,5-125
8-65
9-385
5-42
200-650
16-34
14-825
AC range [V]
4-95
6-50


150-500

11-625


And surge parameters they are declared for
Series
Unit
Z
Z+
ZT
in@8/20µs×10
kA



Imax@8/20µs×1
kA
0,02-1,2
0,5-20
0,075-0,2
Vsurge@10/700µs
kA


3-12
ESD contact / air
kA



WLD × 10
J





Series
Unit
ZE
D
A
P
in@8/20µs×10
kA



0,15-5
Imax@8/20µs×1
kA

0,1-3
0,2-5,5
0,25-10
Vsurge@10/700µs
kA




ESD contact / air
kA
8/15



WLD × 10
J


1,5-80



Plastic encapsulated SMD varistor series P has c-UL-us certificate E330019 acording to UL1449. All our SMD varistirs are RoHS, RoHS II, III and REACH compliant.
Should you have any questions, comments, inquiries, or sample request, please, turn to us. We will be most glad to be of assistance to you.
OCT. 19,
2021.
We are glad to inform you that today, on 19th of Oct. 2021 we attained the Certificate of Excellence given to Small & Medium Enterprises by the Chamber of Commerce and Industry of Slovenia, which certifies that ZIVIC d.o.o. satisfies the conditions related to credit rating based on regular monitoring by COFACE Slovenia credit report house. Please, use the QR code on the left to verify the current validity.
MAR. 14, 2021.
Our recent development result - very thin (3 mm) power GDT (photo 1. & 2) realised in different diameters (from 16 to 30 mm) for various DC spark-over voltages and surge parameters - has enabled us to go one step further and develop IVG components - Integrated Varistor + GDT (photo 3. & 4.) for Class I+II surge protection, which fulfil requirements of IEC61643 and UL1449. Integration of high power varistor and GDT leverages the advantages of both components and alleviates their drawbacks as shown in the table below.


photo 1.

photo 2.

photo 3.

photo 4.



Parameter
type of device

Response speed
Capacitance


Leakage current
Aging

Watt loss heating

Heating-up
in operation

Power dissipation
TOV withstand
capability

Surge current
withstand capability

Clamping voltage
stability

Turnning-off


V-t characteristics









GDT
switching

Long ( ‹ 1 µs )
Low ( 1-5 pF )


Low ( ‹ 1 pA )
Particulary good

none

low


low
Particulary good


High


Stable and low


Problematic








VDR
clamping

Short ( ‹ 25 ns )
High ( 1-10 nF )


High ( ‹ 20 µA )
Poor

Exists

High


High
Poor


100 times lower for
similar product size

Increase with
current increase

Excellent








IVG
switching + clamping

Shorter than GDT
Low ( 1-5 pF )


Low ( ‹ 0,1µ )
Particulary good

None

Medium


Medium
Particulary good


High


Increase with
current increase

Excellent








Benefits of integrated component


Shorter than rise time of typical surges
Suitable for high frequency power line
communications enabling high data rates

Lower energy consumption in standby regime


Higher reliability and longer life





Higher level of safety








No need for GDT design with follow current specification

Based on all above said IVG components have:
  • higher reliability and longer life,
  • higher level of safety for extended voltage
    threats,
  • lower energy consumption in standby regime,
  • suitable for high frequency power line
    communicationsenabling high data rates.
  • easy mounting into existing customer’s
    SPD housings.

We look forward to your requirements and will be glad to recommend and produce appropriate custom designed IVG components for you.
FEB. 12, 2021.
Beside standard TW Series and Class II T Series where varistor and fuse are integrated, ZIVIC offer of TMOVs now includes Class II TC Series of plastic encapsulated TMOVs with thermal disconnector instead of the fuse. TC series has three sizes 14, 20 and 23. Size 14 and 20 have and two versions of lead configurations: N – double pin and M - triple pin. Size 23 has one version – with 5 leads, whereby two of them are used for light indication. All types are c-UL-us certified.

TC Series complies with standards IEC 61643-11: 2011 and UL1449.

Thermal stability test results according to IEC 61643-11: 2011, item 8.3.5.2. (procedure A) are presented in Fig. 1., where temperature is measured in three points on the component body.





Limited current abnormal overvoltage test results acc. to UL1449, item 44.4 are shown in Fig. 2, where the disconnection time is measured under the test voltage of 550 Vac and short circuit current of 10 A.


Fig. 2a. Overvoltage test of TCM 275 K 14 :
Disconnection time is 760 ms


Fig. 2b. Overvoltage test of TCN 275 K 14 :
Disconnection time is 720 ms