Data Sheet

Customer :
Ordercode:
Description :
-40 85 125
100 100 0
RoD Version 6 2016-05-10
JB Version 5 2010-05-27
JPP High Temperature Load 2006-07-31
JPP New P/N 2006-06-02
JPP Operating Temp. Range 2005-11-30
JPP Lead Free Soldering 2005-11-04
Name Modification Date
Checked
Approved
Würth Elektronik eiSos GmbH & Co. KG
D-74638 Waldenburg · Max-Eyth-Strasse 1 · Germany · Phone (+49) (0) 7942 - 945 - 0 · Fax (+49) (0) 7942 - 945 - 400
DATE : 2016-05-10
H Temperatur Derating:
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http://www.we-online.com
I Design Note:
Date
Signature
Würth Elektronik
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General Release:
Customer
Specification for Release
82531040
SMD Varistor Power WE-VS
This electronic component has been designed and developed for usage in general electronic equipment. Before incorporating this component into any equipment where higher safety and
reliability is especially required or if there is the possibility of direct damage or injury to human body, for example in the range of aerospace, aviation, nuclear control, submarine,
transportation, (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc, Würth Elektronik eiSos GmbH must be
informed before the design-in stage. In addition, sufficient reliability evaluation checks for safety must be performed on every electronic component which is used in electrical circuits that
require high safety and reliability functions or performance .
Varistors do not have an endless lifetime. Also a well dimensioned varistor may fail due to enormous
overload. This will result in heating, smoke emission and / or displosion of varistor itself. Therefore we
recommend to place varistors separate within a box on PCB.
The usage of varistors above the specified
operating temperature is not recommended.
However, is there a need for this, you have to
derate according to right figure
- operating voltage
- peak current-
- energy absorption
- permissible energy
0
20
40
60
80
100
-50 -25 0 25 50 75 100 125 150
% of max. values
Operating Temperatur [°C]
Temperature Derating
Furthermore a fuse should be in the varistor’s current path to avoid
secondary current in case the varistor fails. This fuse can protect
against secondaty currents and therewith caused damages.
Protected
Load