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The following DCR modifications were agreed with Vishay. The original DCR changes are replaced by the following for clarification & correction purposes.
a) The following changes to Operating Life shall only impact failure rate Variants 11 to 20, type CHPFR (i.e. original DCR changes for Variants 01 to 10 are removed)
b) For Para.2.7, Operating Life test, 2 new intermediate measurements at 4000h and 6000h are added (after the 2000h test) plus clarification is made to the final 8000h measurements, as follows:
………….
Intermediate Measurements (4000 hours) (Notes 1, 2)
Change in Resistance ΔRA/RA
Variants 11 to 20:
Limits: ± (4 + 0.05Ωx100/Rn) %
…………..
Intermediate Measurements (6000 hours) (Notes 1, 2)
Change in Resistance ΔRA/RA
Variants 11 to 20:
Limits: ± (4.5 + 0.05Ωx100/Rn) %
…………….
Final Measurements (8000 hours) (Note 1)
Change in Resistance ΔRA/RA
Variants 11 to 20:
Limits: ± (5 + 0.05Ωx100/Rn) %
………………
c) Add new Note 2 to the table in Para 2.7:
2. These measurements are optional at the Manufacturer's discretion.
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