BornachMay 4, 2024

The DC rails on this failed switching power supply from a wall wort AC adapter, were shorted together. It could be one of 4 components: 2 electrolytic capacitors, a surfacemount ceramic capacitor, or a surfacemount Schottky diode. Started desoldering each one and testing for the short. It cleared when the Schottky diode (SK26) was removed

I don't think I have a high current replacement diode in this form factor.
#electronics #repair #SchottkyDiode

Show threadBornachMay 4, 2024

I do have a 1N5822 Schottky

Comparing datasheets
SK26 60V 2A
1N5822 40V 3A

The voltages on this side of the switch mode power supply are not expected to be much higher than 12V DC. This wall wort is rated at 600mA 7.2VA. The electrolytic caps are only rated up to 16V

Will it work?
#electronics #repair #switchmode #powerSupply #Schottky #Diode

Show threadNorris Dale AC1LPMay 4, 2024
@bornach
Off-hand I'd say it'd work fine, if, as you say, the diode lives on the primary side.
Show threadTecci
@MoHandy @bornach
Perhaps you should look at the switchingtimes, too
#electronics
May 4, 2024 at 4:42pmWeb
Show threadfiguratumMay 4, 2024
@Tecci @MoHandy @bornach switching time shouldn't be an issue if both are Schottky diodes.