MKP1839 HQ
Vishay Roederstein
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GROUP C INSPECTION REQUIREMENTS
SUB-CLAUSE NUMBER AND TEST
CONDITIONS
PERFORMANCE REQUIREMENTS
SUB-GROUP C1B PART OF SAMPLE
OF SUB-GROUP C1
4.7
Vibration
Mounting:
see section “Mounting” of this specification
Procedure B4
Frequency range: 10 Hz to 55 Hz
Amplitude: 0.75 mm or
Acceleration 98 m/sꢀ
(whichever is less severe)
Total duration 6 h
4.7.2
4.9
Final inspection
Shock
Visual examination
No visible damage
Mounting:
see section “Mounting” for more information
Pulse shape: half sine
Acceleration: 490 m/sꢀ
Duration of pulse: 11 ms
4.9.3
Final measurements
Visual examination
Capacitance
No visible damage
|C/C| 2 % of the value measured initally
Tangent of loss angle
Increase of tan :
for C 470 nF 0.001 (10 x 10-4)
for C > 470 nF 0.0015 (15 x 10-4)
Compared to values measured initially
Insulation resistance
50 % of values specified in section
“Insulation Resistance” of this specification
SUB-GROUP C1 COMBINED SAMPLE
OF SPECIMENS OF SUB-GROUPS
C1A AND C1B
4.10
Climatic sequence
4.10.2 Dry heat
Temperature: 110 °C
Duration: 16 h
4.10.3 Damp heat cyclic
Test Db, first cycle
4.10.4 Cold
Temperature: -55 °C
Duration: 2 h
4.10.6 Damp heat cyclic
Test Db, remaining cycles
4.10.6.2 Final measurements
Voltage proof = URDC for 1 min within
15 min after removal from testchambers
No breakdown or flashover
Visual examination
No visible damage
Legible marking
Capacitance
|C/C| 3 % of the value measured initially
Tangent of loss angle
Increase of tan :
for C 470 nF 0.001 (10 x 10-4)
for C > 470 nF 0.0015 (15 x 10-4)
Compared to values measured in
4.3.1 or 4.6.1 as applicable
Insulation resistance
50 % of values specified in section
“Insulation Resistance” of this specification
Revision: 21-Dec-15
Document Number: 28162
1ꢀ
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