Part identification Server PSU

[fatunicorn]

Hello there!

I have a Supermicro PWS-706P-1R 750W server PSU, which is not working anymore.
I've opened it up, checked for the empty cap and did a visual inspection.
In no time I found the SOT-89-3 Package on where the magic smoke escaped.
Now the hard part: with what replace that thing?
I still could see the markings on it, it says DKQ and a letter with a half circle at the bottom, like o or 0.
Searching throug google lead me nowhere, only some sketchy aliexpress or russian pages.
Can someone of you identify that component? (or tell me with what to replace without immediately setting everything on fire)
I've soldered leads to it to measure if it is necessary, but it's on the high voltage side, and I don't want to plug it in in that state untill necessary.

Thanks in advance for your help!

[ArdWar]

2SC4672 maybe?

There are a lot of SOT-89 components with DK* marking.

[fzabkar]

https://www.aliexpress.com/w/wholesale-sot89-dk.html?initiative_id=

[fatunicorn]

Thank you two for the reply!
It looks indeed, that the part is the 2SC4672.
What's the worst thing that can happen, if I solder one of those in there?
I will try to order some of them, and see if it will work.

[wasedadoc]

Thank you two for the reply!
It looks indeed, that the part is the 2SC4672.
What's the worst thing that can happen, if I solder one of those in there?
I will try to order some of them, and see if it will work.

There is a distinct possibility that the new one you fit will release its magic smoke.  The real fault that caused the original to fail may still be present.

[MathWizard]

I'd map out some of the circuit, I use a magnifying loupe, or sometimes a LCD microscope. Sometimes it's like going off to another world.