[AMPS] Diodes

[2@vc.net (measures)]

>
>Rich says;
>
>       >Two diodes rated at 100piv minimum are connected in series.  One diode 
>       >measures 101piv and the other measures 190piv.  The diodes are wired 
> in  
series.  No ''equalization'' is used.  A mains surge of 250p-v
>appears.  Does either diode conduct in the reverse direction?
>
>Maybe. You haven't provided enough information. 

Ok.  The mains are 50Hz.  The equalizers are 10k ohms each.  

> If the PIVs are that
>different, the capacities are likely to be so, so the answer is 'quite
>possibly'. You're assuming that it is purely the reverse leakage that
>determines the voltage distribution.
>
Not a good wager.  Without equalization, neither diode's piv limit is 
exceeded and reverse current is virtually zero.  With equalization the 
101v diode is toast.  


cheers, Peter

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