Multilayer Varistors
Performance and Testing Methods
Characteristics
Specifications
Testing Method
Standard test
conditions
Electrical characteristics shall be measured under the following conditions.
Temp. : 5 to 35 °C, Relative humidity : 85 ꢀ or less
The Varistor voltage is the voltage (VC,or VcmA) between both end terminals of a
Varistor when specified current (CmA) is applied to it. The measurement shall be
made as quickly as possible to avoid heating effects.
To meet the specified
value.
Varistor voltage
Maximum
To meet the specified
allowable voltage value.
The maximum DC voltage that can be applied continuously to a varistor.
To meet the specified Capacitance shall be measured at the specified frequency, bias voltage 0 V,
Capacitance
value.
and measuring voltage 0.2 to 2 Vrms.
The maximum current measured (Varistor voltage tolerance is within 10 ꢀ)
when a standard impulse current of
8/20 µ seconds is applied twice with an interval of 5 minutes.
Maximum peak
current
To meet the specified
value.
The maximum ESD measured (while the varistor voltage is within 30 ꢀ of its
nominal value) when exposed to ESD 10 times
(five times for each positive-negative polarity) based on IEC61000-4-2.
To meet the specified
value.
Maximum ESD
The part shall be immersed into a soldering bath under the conditions below.
Solder: H63A
Soldering flux
: Ethanol solution of rosin (Concentration approx. 25 wtꢀ)
Soldering temp. : 230 5 °C
Period : 4 1 s
To meet the specified
value.
Solder ability
Soldering position: Immerse both terminal electrodes until they are completely
into the soldering bath.
After the immersion, leave the part for 24 2 hours under the standard condition,
then evaluate its characteristics.Soldering conditions are specified below:
ΔVc / Vc : within 10 ꢀ Soldering conditions : 270 °C, 3 s / 260 °C, 10 s
Soldering position : Immerse both terminal electrodes until they are completely
Resistance to
soldering heat
into the soldering bath.
After repeating the cycles stated below for specified number of times, leave
the part for 24 2 hours, then evaluate its characteristics.
Cycle : 5 cycles
Temperature
cycling
Step
Temperature
Max. Operating Temp.
Ordinary temp.
Period
ΔVc / Vc : within 10 ꢀ
1
2
3
4
30 3 min
3 min max.
30 3 min
3 min max.
Min. Operating Temp.
Ordinary temp.
After conducting the test under the conditions specified below, leave the part
24 2 hours, then evaluate its characteristics.
Temp.
Humidity
: 40 2 °C
: 90 to 95 ꢀRH
Biased Humidity
ΔVc / Vc : within 10 ꢀ
Applied voltage : Maximum allowable voltage (Individually specified)
Period : 500+24 / 0 h
After conducting the test under the conditions specified below, leave the part
24 2 hours, then evaluate its characteristics.
High temperature
exposure
(dry heat)
ΔVc / Vc : within 10 ꢀ Temp.
Applied voltage : Maximum allowable voltage (Individually specified)
Period : 500+24 / 0h
: Maximum operating temperature 3 °C (Individually specified)
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
04 Nov. 2016