Data Sheet

18 11/07
Please read Cautions and warnings and
Important notes at the end of this document.
Reliability data
Test Test methods/conditions Requirement
Varistor voltage The voltage between two terminals with
the specified measuring current applied
is called V
v
(1 mA
DC
@ 0.2 … 2 s).
To meet the specified value.
Clamping voltage The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
To meet the specified value.
Max. AC operating voltage CECC 42 000, test 4.20
1000 h at UCT
After having continuously applied
the maximum allowable voltage at UCT
±2 °C for 1000 h, the specimen shall be
stored at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the change of V
v
shall be
measured.
|
∆V/V (1 mA)
|
≤10%
Surge current derating,
8/20 µs
CECC 42 000, test C 2.1
100 surge currents (8/20 µs), unipolar,
interval 30 s, amplitude corresponding
to derating curve for 100 impulses at
20 µs
|
∆V/V (1 mA)
|
≤10%
(measured in direction
of surge current)
No visible damage
Surge current derating,
2ms
CECC 42 000, test C 2.1
100 surge currents (2 ms), unipolar,
interval 120 s, amplitude corresponding
to derating curve for 100 impulses at
2ms
|
∆V/V (1 mA)
|
≤10%
(measured in direction
of surge current)
No visible damage
Electric strength CECC 42 000, test 4.7
Metal balls method, 2500 V
RMS
, 60 s
The varistor is placed in a container
holding 1.6 ±0.2 mm diameter metal
balls such that only the terminations of
the varistor are protruding.
The specified voltage shall be applied
between both terminals of the speci-
men connected together and the elec-
trode inserted between the metal balls.
No breakdown
StandarD series
Leaded varistors