Don't Miss

Universal Schottky Diode For Replacement

By on November 7, 2012

If you repair consumer type of switch mode power supplies and you found a secondary diode shorted, chances is high it will be the Schottky diode type. Older designs use Ultra Fast Recovery Diodes. There are hundreds of part number for Schottky diodes and there is no way you will keep or buy all the part number. The best solution is to buy a universal part number and use it on all secondary side of SMPS. One part number that I found could be use for replacement is the SR5 series Schottky diode (SR520,SR530,SR540,SR550….SR5100). Click on the photo to visit the spec of the Schottky diodes and you will know that it is 5 ampere ranging from 20 v to 100 volt.

schottky diode

If you are not sure what is the spec of the original diode part number you can use the highest range (SR5100-5amps, 100volt) as a test. Remember to burn in the equipment for long hours after replacement.



  1. beh

    November 8, 2012 at 3:35 am

    thaks for great info

    • Jestine Yong

      November 8, 2012 at 6:33 am

      Hi Beh,

      You are welcome!


  2. Rey

    September 18, 2019 at 3:01 pm

    Is there a other diode replacement for sr5100.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Free Report