Wouter van Ooijen wrote:

>>> Sideline: does a diode spec mention a maximum *forward* voltage? 
>> 
>> No, but a maximum forward current. As long as you stay below that, the
>> forward voltage is in normal ranges. 
> 
> In a static situation yes, but the issue here was that the forward
> voltage might rise so fast that the diode does not have time to turn on
> so you'd get a large forward voltage which might destroy the diode. I
> doubt the reality of this scenario, but it is what (this part of) the
> discussion was about.

I understand. But I don't think this is usually specified. 

As Spehro says, they often specify the forward voltage at a number of
(static) forward currents. The only dynamic characteristic that I think is
commonly specified is capacitance in reverse and reverse recovery.

But they actually specify the maximum forward voltage (at a certain
current) in maximum ratings sections. We probably could conclude from this
that going over this in a dynamic situation takes the diode out of the
specified operating range.

Gerhard

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