i see Vf of my original is 0.55V. I have here diode with Vf 0.62 V, can i use it?

thanks in advance

 

I don't know what you are doing with the diode but probably it will work.

 

why probably? it is from personal computer power supply

 

Show us a photo of the diode and the whole board.

 

 

There are many options available.
Here is STPS3045CT.

 

i want to know

i see Vf of my original is 0.55V. I have here diode with Vf 0.62 V, can i use it?

 

why no one is answering ?

 

Vf is not constant. It varies with the forward current.
Try it and see if it fixes your problem.

 

i want to know

It will work,even if Vf is slightly different. A slightly higher temperature is expected, so provide a good thermal contact to the heatsink