Diode replacement

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mgfever

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I’ve got a blown diode in the starting circuit of the 86. This is the one shown in the starting circuit labeled Silicon Rectifier. Anyone know what the part number is or a suitable replacement? Also, I suppose I should check what could cause this and what else I should be checking. Wires in and out of it are melted for a couple inches. Neutral light would come on and I did get ignition once while I was testing.
Thanks for any help.
 
You should be able to use any number of diodes in that application for hardly any cost at all.
 
[url=https://classicgoldwings.com/forum/viewtopic.php?p=201271#p201271:2488l54j said:
mgfever » Thu Mar 15, 2018 5:55 am[/url]":2488l54j]
Oh great! I just ordered one from Parts n more for $23 after shipping!
:doh:
I am sure that we have all been guilty of that impulse buy that we pulled the trigger on a little too quickly.. :yes: :whip:
 
[url=https://classicgoldwings.com/forum/viewtopic.php?p=201279#p201279:966enxei said:
D-50Dave » Thu Mar 15, 2018 9:42 pm[/url]":966enxei]
Whenever I do something along that line (regularly) I tell myself "ten years from now, it will make no difference in my life". Often over way more than $20.
:yes: :whistling:
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=201253#p201253:5doeul2b said:
Ansimp » Tue Mar 13, 2018 10:10 pm[/url]":5doeul2b]
You should be able to use any number of diodes in that application for hardly any cost at all.
So, could you list a couple equivalents? 1n4004? Both of the diodes on my '78 are blown. I can't find an equivalent online for S5H-02.
 
I would never pay that kind of price for a diode. I bought a pack of 20 / 20 amp diodes for like 10 $. I just solder tabs at the end of the diode cover with heat shrink . Just make sure you plug in the right direction.
 
I am curious to know why the diodes have blown. In most applications they carry very little current. 4004s are a one amp diode and should be fine. You can always use a larger (physical size and capacity) if you need more current. :yes:
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204360#p204360:1izfeg7o said:
Ansimp » Tue Jul 10, 2018 6:38 am[/url]":1izfeg7o]
I am curious to know why the diodes have blown. In most applications they carry very little current. 4004s are a one amp diode and should be fine. You can always use a larger (physical size and capacity) if you need more current. :yes:
I think they just get tired and old and pop like people LOL.
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204376#p204376:gdf9nscc said:
dan filipi » Wed Jul 11, 2018 5:29 am[/url]":gdf9nscc]
If battery + is ever sent thru it for only just an instant, that’s plenty to burn the diode.
Reversed connection at the battery would do it.
I am pretty sure that the reverse connection is not a problem Dan as that is the nature of a diode (stop flow in one direction) but if Too much current is put through the diode it will definitely fail. :whistling:
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204379#p204379:7k7c5suv said:
Ansimp » 38 minutes ago[/url]":7k7c5suv]
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204376#p204376:7k7c5suv said:
dan filipi » Wed Jul 11, 2018 5:29 am[/url]":7k7c5suv]
If battery + is ever sent thru it for only just an instant, that’s plenty to burn the diode.
Reversed connection at the battery would do it.
I am pretty sure that the reverse connection is not a problem Dan as that is the nature of a diode (stop flow in one direction) but if Too much current is put through the diode it will definitely fail. :whistling:
The other side of the diode is grounded so yes, hot sent thru it will burn the diode...aka a dead short and the diode ends up being a fuse.
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204383#p204383:30edizbq said:
dan filipi » Tue Jul 10, 2018 5:25 pm[/url]":30edizbq]
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204379#p204379:30edizbq said:
Ansimp » 38 minutes ago[/url]":30edizbq]
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204376#p204376:30edizbq said:
dan filipi » Wed Jul 11, 2018 5:29 am[/url]":30edizbq]
If battery + is ever sent thru it for only just an instant, that’s plenty to burn the diode.
Reversed connection at the battery would do it.
I am pretty sure that the reverse connection is not a problem Dan as that is the nature of a diode (stop flow in one direction) but if Too much current is put through the diode it will definitely fail. :whistling:
The other side of the diode is grounded so yes, hot sent thru it will burn the diode...aka a dead short and the diode ends up being a fuse.

here is what diodes are all about.

https://whatis.techtarget.com/definition/diode
 
Ansimp":2ydlr3zw said:
I am curious to know why the diodes have blown. In most applications they carry very little current. 4004s are a one amp diode and should be fine. You can always use a larger (physical size and capacity) if you need more current. :yes:
Looked up the starter solenoid resistance - 3.4 ohms, so at 12 V it draws about 3.5 amps (which would pass through the diode if in-gear, clutch pulled and starter actuated). Should be at least a 10 amp 30 volt diode. They make a lot of 10 amp 50 volt Schottky's for solar arrays. If I blow another, that's what I'll get.
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204379#p204379:8uz12pny said:
Ansimp » Tue Jul 10, 2018 5:46 pm[/url]":8uz12pny]
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=204376#p204376:8uz12pny said:
dan filipi » Wed Jul 11, 2018 5:29 am[/url]":8uz12pny]
If battery + is ever sent thru it for only just an instant, that’s plenty to burn the diode.
Reversed connection at the battery would do it.
I am pretty sure that the reverse connection is not a problem Dan as that is the nature of a diode (stop flow in one direction) but if Too much current is put through the diode it will definitely fail. :whistling:
I blew out diodes as a teenager. I can't recall if I shorted something or reversed battery connection.
 
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