Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

What Size Diode ?


  • Please log in to reply
9 replies to this topic

#1 chieffan ONLINE  

chieffan
  • Senior Member
  • Contributor
  • Member No: 62695
  • 6,166 Thanks
  • 4,507 posts
  • Location: SW Iowa

Posted October 07, 2016 - 06:54 PM

I have two stators, one from a Briggs and another from a Tech.  Both have blown diodes.  Does anyone know the rating or capacity of those diodes?  They are usually dirt cheap, like 4/$1 but need to get them heavy enough to handle the load.  They have them at 22V 5 Watts or 3A at 100 Volts.  The 22 V would be high enough but what about the 5 W.  The 3 A is on the light side I would think.



#2 MH81 ONLINE  

MH81

    Proud to be Deplorable

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 802
  • 27,311 Thanks
  • 28,632 posts
  • Location: N. W. PA

Posted October 07, 2016 - 07:00 PM

Try this to fill in the blanks.image.gif

Edit, wait a minute, are you looking at Zenier diodes??


Best to go with something like a NTE5812 unless the original was a zener in the circuit.
http://www.nteinc.co.../nte5812_17.pdf
  • Cvans and chieffan have said thanks

#3 chieffan ONLINE  

chieffan
  • Senior Member
  • Contributor
  • Member No: 62695
  • 6,166 Thanks
  • 4,507 posts
  • Location: SW Iowa

Posted October 07, 2016 - 07:32 PM

I can go either way, Zenier or standard.  Have no idea what was originally as they were both blew to pieces and the manuals show the parts only.



#4 chieffan ONLINE  

chieffan
  • Senior Member
  • Contributor
  • Member No: 62695
  • 6,166 Thanks
  • 4,507 posts
  • Location: SW Iowa

Posted October 07, 2016 - 07:38 PM

Also found a 4 amp 600 volt ultra fast rectifier.  I would thing this would work. 2/$1.20.  Will order other items to make the shipping worth while.

http://www.allelectr...5/diodes/1.html



#5 stiemmy ONLINE  

stiemmy
  • Senior Member
  • Contributor
  • Member No: 53712
  • 1,307 Thanks
  • 1,106 posts
  • Location: Freekin cold central WI

Posted October 07, 2016 - 07:59 PM

Also found a 4 amp 600 volt ultra fast rectifier. I would thing this would work. 2/$1.20. Will order other items to make the shipping worth while.
http://www.allelectr...5/diodes/1.html

Too large of a diode will not hurt, it only acts as a reverse flow kill. A diode regulates flow direction, not current TO A CERTAIN EXTENT, but thats another topic. (DIRTY POWER SUPPLY)

You should be fine as long as you're in the 10% value range, and/or running larger, as far as diode tolerances run!

Edited by stiemmy, October 07, 2016 - 08:05 PM.

  • chieffan said thank you

#6 larrybl ONLINE  

larrybl

    Texas Member

  • Site Supporter
  • -GTt Supporter-
  • Contributor
  • Member No: 415
  • 4,953 Thanks
  • 3,326 posts
  • Location: Central Texas

Posted October 07, 2016 - 09:24 PM

These are what I use on the 9A Craftsman Stator. It used a dual diode setup, One for PTO, One reversed for lights. Not had a failure with them.

Attached Thumbnails

  • P1170776.jpg
  • P1170777.jpg

  • MH81, Alc, Cvans and 1 other said thanks

#7 ducky OFFLINE  

ducky

    Senior Member

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 564
  • 1,630 Thanks
  • 3,869 posts
  • Location: Freedom, WI

Posted October 07, 2016 - 09:32 PM

I do not believe you want to use a Zener as it is meant to regulate voltage.

A rectifier type would be the one you need to convert AC to DC.

Not sure of the current involved here but as Stiemmy mentioned it will not hurt to be over sided.  As far as the voltage rating it stands for what the diode can block before it breaks down.  Also size corresponds to amperage.


  • chieffan said thank you

#8 chieffan ONLINE  

chieffan
  • Senior Member
  • Contributor
  • Member No: 62695
  • 6,166 Thanks
  • 4,507 posts
  • Location: SW Iowa

Posted October 08, 2016 - 08:16 AM

RS stores closed up in this area.  Have one about 35 miles away.  Don't have much though.


Edited by chieffan, October 08, 2016 - 08:20 AM.


#9 larrybl ONLINE  

larrybl

    Texas Member

  • Site Supporter
  • -GTt Supporter-
  • Contributor
  • Member No: 415
  • 4,953 Thanks
  • 3,326 posts
  • Location: Central Texas

Posted October 08, 2016 - 08:30 AM

I've ordered from here before. http://www.mouser.co...CFQxofgodcCkM6g

 

I noticed ebay only sells lots of 40 each. Moucer you can get them individually for 0.41 ea.


  • Cvans said thank you

#10 stiemmy ONLINE  

stiemmy
  • Senior Member
  • Contributor
  • Member No: 53712
  • 1,307 Thanks
  • 1,106 posts
  • Location: Freekin cold central WI

Posted October 08, 2016 - 08:49 AM

If you have an appliance or tv repair shop locally that might be an option?

Thats where I go if Im in a pinch. Good luck;)
  • Cvans said thank you




Top