B722 datasheet(20/47 Pages) EPCOS

20 / 47 page

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:

°C, 93% r. H., 24 h, IEC

60068-2-30, test Db

c) cold, LCT, 2 h, IEC 60068-2-1, test

d) damp heat, additional 5 cycles:

°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 VV shall be

measured. Thereafter, insulation resis-

tance Rins shall be measured at

V = 500 V.

∆V/V (1 mA)| ≤10%

Rins

≥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

±2 °C, 90 to 95% r. H. for 56 days

without load / with 10% of the maxi-

mum continuous DC operating voltage

VDC. Then stored at room temperature

and normal humidity for 1 to 2 h.

Thereafter, the change of VV shall be

measured. Thereafter, insulation resis-

tance Rins shall be measured at

V = 500 V (insulated varistors only).

∆V/V (1 mA)| ≤10%

Rins

≥100 MΩ

Leaded varistors

B722*

StandarD series

Page 20 of 47

Please read Cautions and warnings and

Important notes at the end of this document.

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