Test Test methods/conditions Requirement
Climatic sequence The specimen shall be subjected to:
a) dry heat at UCT, 16 h, IEC
60068-2-2, test Ba
b) damp heat, 1st cycle:
55 °C, 93% r. H., 24 h, IEC
60068-2-30, test Db
c) cold, LCT, 2 h, IEC 60068-2-1, test
Aa
d) damp heat, additional 5 cycles:
55 °C/25 °C, 93% r. H., 24 h/cycle,
IEC 60068-2-30, test Db.
Then 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. Thereafter, insulation resis-
tance R
ins
shall be measured at
V = 500 V.
|∆V/V (1 mA)| ≤10%
R
ins
≥100 MΩ
Rapid change of
temperature
IEC 60068-2-14, test Na, LCT/UCT,
dwell time 30 min, 5 cycles
|∆V/V (1 mA)| ≤5%
No visible damage
Damp heat, steady state IEC 60068-2-78, test Ca
The specimen shall be subjected to
40 ±2 °C, 90 to 95% r. H. for 56 days
without load / with 10% of the maxi-
mum continuous DC operating voltage
V
DC
. Then stored at room temperature
and normal humidity for 1 to 2 h.
Thereafter, the change of V
V
shall be
measured. Thereafter, insulation resis-
tance R
ins
shall be measured at
V = 500 V (insulated varistors only).
|∆V/V (1 mA)| ≤10%
R
ins
≥100 MΩ
Leaded varistors B722*
SuperioR-MP, S20 series
Page 7 of 24Please read Cautions and warnings and
Important notes at the end of this document.
