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nermal
Last week we had some JAN2N1774A SCRs fail in a system. Failure was due
to poor/defective workmanship. The date/code was 9240 (40th week of
1992). I read somewhere that GE quit manufacturing semiconductors
sometime around 1987.
Externally these do not match the 1981 -1983 date code parts at all.
The die is also different. Today I received a "9242 JANTX2N1774A" that
had the same external and internal construction. I suspected it was
also counterfeit until I tried to remove a stain from the case with
Isopropyl alcohol. The device markings were removed as well as the
yellow stain! (Note: JAN parts had to pass a marking permanency test
that was much more severe than wiping with a Q-tip saturated with
Isopropyl Alcohol.
Does any one out there know when GE shut down their semiconductor
plants? I tried looking up the history of GE on the net (also tried
GIDEP searches on GE semiconductors with no luck).
Thanks,
Nermal
to poor/defective workmanship. The date/code was 9240 (40th week of
1992). I read somewhere that GE quit manufacturing semiconductors
sometime around 1987.
Externally these do not match the 1981 -1983 date code parts at all.
The die is also different. Today I received a "9242 JANTX2N1774A" that
had the same external and internal construction. I suspected it was
also counterfeit until I tried to remove a stain from the case with
Isopropyl alcohol. The device markings were removed as well as the
yellow stain! (Note: JAN parts had to pass a marking permanency test
that was much more severe than wiping with a Q-tip saturated with
Isopropyl Alcohol.
Does any one out there know when GE shut down their semiconductor
plants? I tried looking up the history of GE on the net (also tried
GIDEP searches on GE semiconductors with no luck).
Thanks,
Nermal
