Diode 1N 540 905 - test-drb@ccmp.vtda.org

27 Jul 2005

On Tue, 26 Jul 2005 22:38:18 -0400 Chuck Swiger  
<cswiger at widomaker.com> wrote:

[...]

...
  Anyway it's blowing fuses - traced it to a shorted
diode in a power
 supply, marked

 (Motorola Symbol)
            ZP
            1N
            540
            905

 Don't think it's a 1N540 - top hat silicon - this one just looks  
 like a
 fat 1N4007 cylinder. Not a 1N5409.  1N540905 doesn't exist in
 google-world.    ---(==(---

 Any tips, actually just want ratings for replacement  TIA

 --Chuck 
You might want to look at ONSemi.com (ex Motorola). Entering 1N540  
gets a listing for 1N540x. The data sheet shows a diode as described  
with the markings similar to that above, except that you seem to be  
missing a trailing character on each of the numeric lines. This is a  
series of 3 amp diodes with various voltage ratings. If you can't  
make out the training number, either go for the highest rating or  
measure the open circuit voltage that feeds the diode. Hope this  
helps...

     CRC