TYPE

SMV0402E

PAGE

4/9

CITATION

DATE

Feb. 13, 2009

SUBJECT

Reliability

REV.

C01

3. ENVIRONMENTAL CHARACTERISTICS

Test method and description

3.1

High Temperature

Storage

The specimen shall be subjected to 150 ± 2℃ for 1000 ± 12 hours in a thermostatic bath

without load and then stored at room temperature and humidity for 1 to 2 hours.

The change of varistor voltage shall be within 10﹪.

Step

Temperature

Period

1

-40±3℃

30Min±3

2

Room Temperature

1~2 hours

3

125±2℃

30Min±3

The temperature cycle of specified

temperature shall be repeated five times

and then stored at room temperature and

humidity for one or two hours. The

change of varistor voltage shall be within

10﹪and mechanical damage shall be

4

Room Temperature

1~2 hours

3.3

High Temperature

Load

After being continuously applied the maximum allowable voltage at 85 ± 2℃ For 1000± 2

hours, the specimen shall be stored at room temperature and humidity for one or two

hours, the change of varistor voltage shall be within 10﹪.

3.4

Damp Heat Load/

Humidity Load

The specimen should be subjected to 40 ± 2℃, 90 to 95%RH environment, and the

maximum allowable voltage applied for 1000 hours, then stored at room temperature

and humidity for one or two hours. The change of varistor voltage shall be within 10%.

3.5

Low Temperature

Storage

The specimen should be subjected to -40 ± 2℃, without load for 500 hours and then

stored at room temperature for one or two hours. The change of varistor voltage shall be

within 10﹪

4. TECHNICAL TERM

No.

Item

Specifications

Description

4.1

Operating Temperature

Range

-40℃ to +85℃

Operating temperature range without derating.

4.2

Storage Temperature

Range

-40℃ to +125℃

Storage temperature range without voltage applied.

4.3

Transient Response

Time

< 50 ns

Time lag between application of surge and varistor's

"turn-on" conduction action.