B37941 EPCOS AG, B37941 Datasheet - Page 4

• Manufacturer Part Number: B37941
• Description: Multilayer Ceramic Capacitors
• Manufacturer: EPCOS AG

In summary, the ppb level assurance system involves the following points:
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High temperature application:
The listed Advanced series types can be used at 100% rated DC voltage up to 125 °C. Operation
of Advanced capacitors at temperatures >125 °C up to 150 °C is permissible if the applied voltage
is reduced according to the derating diagram below proceeding from a stress level of 100% rated
voltage at 125 °C.
Note:
To achieve highest reliability levels it is generally recommended not to operate ceramic capacitors
continuously at 100% rated voltage. Please see chapter “Reliability” for recommended operating
voltage and calculation of failure rates.
Please read Cautions and warnings and
Important notes at the end of this document.
Multilayer ceramic capacitors
Advanced series
Statistical methods for component design and process control
Use of the Weibull method for statistical data analysis
Introduction of quantifiable parameters (such as the failure time) to replace the previous “good”
or “bad” decisions
Dynamic test limits as a complement to fixed limits in the 100% electrical test
(capacitance C, loss factor tan d , insulation resistance R
Periodic check of the solder-shock resistance at 360 ° C, followed by a burn-in test or HALT
Periodic check of the bending strength by the rigorous piezoelectric method ( D I measurement)
for X7R
A more accurate characterization of the mechanical properties by eliminating impacting factors
by taking measurements on the sintered component
100% automatic optical inspection (AOI)
Ultrasound analysis allowing an internal defect in the ceramic capacitor to be detected in a non-
destructive way
100
90
80
70
60
50
%
125
130
X7R BME and HighCV
135
C0G and X7R NME
140
3
145
10/06
KKE0433-M-E
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ins
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C
)
150
Chip