Reverse overvoltage on diode

C

cupoftea

Advanced Member level 5
Joined
Jun 13, 2021
Messages
2,975
Helped
59
Reputation
118
Reaction score
137
Trophy points
63
Activity points
15,770
Hi,
Do you know why the ringed diode would ever need to be 400V rated? Its a general purpose, SMA, 400V diode.
Why ever do you think they used such a high voltage part?
LTspice and PNG attached.
 

Attachments

  • Diode overvoltage.png
    42.7 KB · Views: 37
  • reverse overvoltage fault.zip
    1.4 KB · Views: 17

Sort by date Sort by votes
Thanks, in the schem of #14 it should not , but you never know with stray inductance, and release-of-short-cct etc etc...we are most worried about cathode of the D5 diode going way below ground, due to stray reactance ringing...and thus we are thinking of adding the shown 27V zener.
 

Upvote 0 Downvote
You must log in or register to reply here.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…