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senast uppdaterad 2011-11-30 . Med reservation för ev tryckfel.


MTBF på RSHR4018BV21

Dear Jens,

The MTBF for RSHR4018BV21 is expected on the same conditions as the previous one is expected to be around 9 years.

We have since earlier also on RSHR4025..:
“The MTBF for RSHR4025CV21 came to be 9.87 years”.

Environment considered was: Ground benign (See attached file: Ground
Benign definition copy.jpg)
Temperature considered was always 60deg C which the max temp at which soft starter must operate.
Standard used is the MIL-HDBK-217F.

Depending on the type of component, other parameters considered in calculating MTBF were:
quality factor
complexity factor
junction temperatures
cycling factor
electrical stress factor
as specified in the standard.

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