METAL OXIDE VARISTORS TNRTM
◆GENERAL SPECIFICATIONS
◆ENVIRONMENTAL CHARACTERISTICS
Item
Standard Test
Condition
Varistor Voltage
Maximum Allowable
Voltage
Maximum Peak
Surge Current
Energy Rating
Rated Wattage
Maximum Clamping
Voltage
Capacitance
Voltage Temperature
Coefficient
Insulation
20±15℃, 85
%RH
Max.
Voltage across varistor at specified current.
Maximum continuous AC voltage (50 to 60Hz AC) and maximum DC voltage which can be
applied.
Maximum surge current (8/20µs pulse wave to be applied once, or twice, 2 minutes apart) for
varistor voltage change within±10% of the initial value.
Maximum energy (2 ms. square wave to be applied once) for varistor voltage change within
±10% of the initial value.
Maximum power (50 to 60Hz AC power to be applied for 1000 hours at 85±2℃) for varistor
voltage change within ±10% of the initial value.
Maximum voltage across varistor when 8/20µs rated current surge is applied.
Varistor's capacitance at 1kHz, standard test condition.
VcmA : Actual varistor voltage
Short circuit the two leads of varistor, and put the varistor body into metal balls (1.6mm
diameter) leaving 2mm epoxy coating outside. Then, apply 2.5kVrms between the leads and
the metal balls for 60±5 sec..
Satisfy the specification
Satisfy the specification
Satisfy the specification
Satisfy the specification
Satisfy the specification
Satisfy the specification
For reference only.
Within±0.05%/℃
The varistor shall withstand
with no abnormality.
VcmA at 85℃– VcmA at 25℃1
VcmA at 25℃60 ×100 (%/℃)
×
Type
5V
7V, 9V, 10V, 12V, 14V, 20V
Current CmA
0.1
1.0
Item
High Temperature
Storage (Dry heat)
Low Temperature
Storage
Damp heat (Humidity)
Temperature Cycle
High Temperature
Operating
Damp heat Operating
The specimen shall be subjected 125
±
2
℃
for 1000
±
12 hours without load.
The specimen shall be subjected -40
±
2
℃
for 1000
±
12 hours without load.
The specimen shall be subjected to 40
±
2
℃
, 90 to 95%RH for 1000
±
12 hours without load.
The temperature cycle shown below shall be repeated 5 cycles.
-40
±
3
℃
, 30 minutes
⇔
+85
±
2
℃
, 30 minutes
The specimen shall be subjected to 85
±
2
℃
with the maximum allowable voltage for 1000
±
12
hours.
The specimen shall be subjected to 40
±
2
℃
, 90 to 95%RH with the maximum allowable voltage
for 1000
±
12 hours.
ΔVcmA/VcmA≦
±
5%
ΔVcmA/VcmA≦
±
10%
ΔVcmA/VcmA≦
±
10%
ΔVcmA/VcmA≦
±
10%
ΔVcmA/VcmA≦
±
5%
ΔVcmA/VcmA≦
±
5%
ΔVcmA/VcmA≦
±
5%
However, on varistors have
nominal varistor voltages
from 15V to 68V, the varistor
voltage change shall be
No remarkable damage
Varistor voltage change of forward direction shall be measured in the test of unipolar surge life and DC load life.
Varistor voltage change is measured after stored at Standard Test Conditions for 1 to 2 hours.
Note : For 42V battery line, please contact our sales office.
Test Conditions Specifications
Test Conditions Specifications
V
Series