MKP338 6 Y2

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Vishay BCcomponents

Revision: 10-Dec-13

12

Document Number: 28114

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

SUB-GROUP C1 COMBINED SAMPLE OF

SPECIMENS OF SUB-GROUPS C1A AND

C1B

4.11

Climatic sequence



4.11.1 Initial measurements

Capacitance

Measured in 4.4.2 and 4.9.2

Tangent of loss angle:

Measured initially in C1A and C1B



4.11.2 Dry heat

Temperature: 105 °C

Duration: 16 h



4.11.3 Damp heat cyclic



Test Db



First cycle



4.11.4 Cold

Temperature: - 55 °C

Duration: 2 h



4.11.5 Damp heat cyclic



Test Db



remaining cycles



4.11.6 Final measurements

Visual examination

No visible damage

Legible marking



Capacitance

|

C/C|  5 % of the value measured in 4.11.1.

Tangent of loss angle

Increase of tan

 0.008

Compared to values measured in 4.11.1



Voltage proof



No permanent breakdown or flash-over

Insulation resistance

 50 % of values specified in section

“Insulation Resistance” of this specification

SUB-GROUP C2

4.12

Damp heat steady state

56 days, 40 °C, 90 % to 95 % RH, no load

Capacitance



4.12.1 Initial measurements

Tangent of loss angle at 1 kHz



4.12.3 Final measurements

Visual examination

No visible damage

Legible marking



Capacitance

|

C/C|  5 % of the value measured in 4.12.1.

Tangent of loss angle

Increase of tan

 0.007

Compared to values measured in 4.12.1.



Voltage proof



No permanent breakdown or flash-over

Insulation resistance

 50 % of values specified in section

“Insulation Resistance” of this specification

GROUP C INSPECTION REQUIREMENTS

SUB-CLAUSE NUMBER AND TEST

CONDITIONS

PERFORMANCE REQUIREMENTS