Joerg wrote:

flipper wrote:
John Larkin wrote:
"Phil Allison" wrote:

Who said power mosfets don't suffer " punch- through" like BJTs do ?

Pics are of an Hitachi 2SK176

Nch lateral, 125 watt, 200 volt, 8amp.



TO-247's don't do that. The plastic just comes off in high-velocity
chunks.

Yeah. Looks, unfortunately, familiar.

Oh, you should have seen all the tubes that came to grief in our ham
radio power amps back in the 70's. Some of that was really ugly. At
least one could usually clean it all up with broom and shovel.

I have a KT88 here somewhere with a *molten* anode.

Graham