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.
Multilayer Varistors for Automotive
Performance and Testing Methods
Characteristics Specifi cations Testing Method
Standard test
conditions
Electrical characteristics shall be measured under the following conditions.
Temp. : 5 to 35 °C, Relative humidity : 85 % or less
Varistor voltage
To meet the specifi ed
value.
The Varistor voltage is the voltage (V
C
,or V
cmA
) between both end terminals of a
Varistor when specifi ed current (CmA) is applied to it. The measurement shall be
made as quickly as possible to avoid heating effects.
Maximum
allowable voltage
To meet the specifi ed
value.
The maximum DC voltage that can be applied continuously to a varistor.
Capacitance
To meet the specifi ed
value.
Capacitance shall be measured at the specifi ed frequency, bias voltage 0 V,
and measuring voltage 0.2 to 2 Vrms.
Maximum peak
current
To meet the specifi ed
value.
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 ESD
To meet the specifi ed
value.
The maximum ESD measured (while the varistor voltage is within blow ranges
of its nominal value) when exposed to ESD 10 times (fi ve times for each positive
negative polarity) based on IEC61000-4-2, ISO10605.
EZJP□□□□□□M : within±10 %, EZJZ□□□□□□M : within±30 %
Solder ability
To meet the specifi ed
value.
The part shall be immersed into a soldering bath under the conditions below.
Solder : Sn-Ag-Cu
Soldering fl ux : Ethanol solution of rosin (Concentration approx. 25 wt%)
Soldering temp. : 230±5 °C
Period : 4±1 s
Soldering position : Immerse both terminal electrodes until they are completely
into the soldering bath.
Resistance to
soldering heat
ΔVc / Vc : within ±10 %
After the immersion, leave the part for 24 ±2 hours under the standard condition,
then evaluate its characteristics.Soldering conditions are specifi ed below:
Soldering conditions : 270 °C, 3 s / 260 °C, 10 s
Soldering position : Immerse both terminal electrodes until they are completely
into the soldering bath.
Temperature
cycling
ΔVc / Vc : within ±10 %
After repeating the cycles stated below for specified number of times, leave
the part for 24±2 hours, then evaluate its characteristics.
Cycle : 2000 cycle
Step Temperature Period
1 Max. Operating Temp. 30±3 min
2 Ordinary temp. 3 min max.
3 Min. Operating Temp. 30±3 min
4 Ordinary temp. 3 min max.
Vibration ΔVc / Vc : within ±10 %
The varistor shall be soldered on the testing board shown in Fig.3.
G force : 5 G
Vibration frequency range : 10 to 2000 Hz
Sweet time : 20 min.
Sweet direction : 12 cycles for 3 courses perpendicular each other
Mechanical Shock ΔVc / Vc : within ±10 %
The varistor shall be soldered on the testing board shown in Fig.3.
Shock-wave formation : Half sine
G force : 50 G
Shock direction : 6 directions of X, Y, Z, for each three times
Biased Humidity ΔVc / Vc : within ±10 %
After conducting the test under the conditions specifi ed below, leave the part
24±2 hours, then evaluate its characteristics.
Temp. : 85±2 °C
Humidity : 80 to 85 %RH
Applied voltage : Maximum allowable voltage (Individually specifi ed)
Period : 2000+24 / 0 h
High temperature
exposure
(dry heat)
ΔVc / Vc : within ±10 %
After conducting the test under the conditions specifi ed below, leave the part
24 ±2 hours, then evaluate its characteristics.
Temp. : Maximum operating temperature ±3 °C (Individually specifi ed)
Applied voltage : Maximum allowable voltage (Individually specifi ed)
Period : 2000+24 / 0h
Feb. 201703
