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???
11/05/08 14:49
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#159766 - That's the point!
Responding to: ???'s previous message
Ap Charles said:
how can you be sure what happens?

That's the whole point: you can not ever be sure!

So, back to your original question,
Should we expect any voltage entering from collector to base

No, you should not expect that - but it might happen; and,

or is it a case of open circuit?.

Again, you should not expect that - but it might happen - and other things may also happen in addition to, or instead of the above...

You would also need to consider the possibility that whatever "blew" the transistor might also have "blown" other things in the system...

List of 21 messages in thread
TopicAuthorDate
Transistor failure question            01/01/70 00:00      
   no guarantee on behaviour            01/01/70 00:00      
      stronger            01/01/70 00:00      
         and...            01/01/70 00:00      
   Thermally destroyed power transistors...            01/01/70 00:00      
      can be both way            01/01/70 00:00      
         When the die alloys then...            01/01/70 00:00      
      Assumptions            01/01/70 00:00      
         Question for Andy            01/01/70 00:00      
            the worst case is...            01/01/70 00:00      
            Assumptions; Conclusions; Guesses            01/01/70 00:00      
               Jan is saying            01/01/70 00:00      
                  Worst case            01/01/70 00:00      
                     Let the circumstances be any?            01/01/70 00:00      
                        Incorrect!            01/01/70 00:00      
                           Not entirely true            01/01/70 00:00      
                              That's the point!            01/01/70 00:00      
                                 Oh Andy            01/01/70 00:00      
                                    No, it wasn't            01/01/70 00:00      
                  explanation            01/01/70 00:00      
         Not at all...            01/01/70 00:00      

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