38
ZENAMIC
Reliability
Characteristics
Criterion
Test Methods/Descriptions
Standard Test Condition
Varistor Voltage
Maximum Allowable Voltage
Maximum Energy
Clamping Voltage
Rated Power
Maximum
Peak Current
(Withstanding
Surge Current)
Temperature Coefficient of
Varistor Voltage
Capacitance
Withstanding Voltage
(Body lnsulation)
lmpulse Life
Electrical
2 times
1 times
Unless other wise specified, electrical measurements (initial/aftertests) shall
be conducted at temperature of 5 to 35 C,relative humidity of 45 to 85%
and atmospheric pressure of 860 to 1060 hPa.
The voltage between two terminals with the specified measuring current CmA
DC applied is called Vc or VcmA. The measurement shall be made as fast as
possible to avoid heat affection.
The maximum sinusoidal RMS voltage or maximum DC voltage that can be
applied continuously in the specified operating temperature range.
The maximum voltage
between two terminals
with the specified
standard impulse current
(8/20 s) illustrated
below applied.
Tim e
20ms
8ms
10
0
50
90
100
The power that can be applied in the specified ambient temperature.
The maximum energy within the varistor voltage change of
10% when a
single impulse current of 2 ms or 10/ 1000 s is applied.
The maximum current within the varistor voltage change of
10% when a
standard impulse current of 8 / 20 s is applied two times with an interval of
5 minutes.
The maximum current within the varistor voltage change of
10% with a
single standard impulse current of 8 / 20 s is applied .
VcmA at 25 C
V0.1mA . V1mA
330V
V0.1mA . V1mA
330V
60
VcmA at 85 C VcmA at 25 C1
104 Times
105 Times
100(%/ C)
Capacitance shall be measured at 1kHz
10%,1Vrms max.(1MHz 10%
below 100pF),0 V bias and 20 2 C
The specified voltage shall be applied between both terminals of the
specimen connected together and metal foil closely wrapped round its body
for 1 minute.
Classification(Nominal varistor voltage)
Test voltage(AC)
1000 Vrms
1500 Vrms
The change of VcmA shall be measured after the impulse current listed
below is applied 10000 or 100000 times continuously at intervals of 10
seconds at room temperature.
ltem
Cycles
Current
lmpulse Life( )
lmpulse Life( )
impulse current
(A)
Part NO.
Z 7D820 to Z 7D511
Z 5D820 to Z 5D471
Z15D820 to Z15D102
Z10D820 to Z10D102
Z21D820 to Z21D102
Z 7D180 to Z 7D680
Z 5D180 to Z 5D680
Z15D180 to Z15D680
Z10D180 to Z10D680
Z21D180 to Z21D680
8( 8 / 20 s)
25( 8 / 20 s)
90( 8 / 20 s)
130( 8 / 20 s)
50( 8 / 20 s)
40( 8 / 20 s)
100( 8 / 20 s)
200( 8 / 20 s)
250( 8 / 20 s)
150( 8 / 20 s)
5( 8 / 20 s)
15( 8 / 20 s)
50( 8 / 20 s)
65( 8 / 20 s)
35( 8 / 20 s)
25( 8 / 20 s)
60( 8 / 20 s)
110( 8 / 20 s)
120( 8 / 20 s)
85( 8 / 20 s)
To meet the
specified value.
0 to 0.05% / C max.
To meet the specified
value
No breakdown
VcmA /VcmA
10%
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