Drop-in replacement for STR-W6052S?

[tfm]

The main board of this LG washing and drying machine was damaged due to overvoltage. It is rated for 127V and was powered on 380V.



Inicial visual inspection revealed that only some components at the input of the SMPS were damaged:






Ironically, both fuses are intact. Probably the X2 cap and the bridge are also damaged. The whole board is immersed in an epoxy resin. I am removing it so I get access to the components.

The SMPS is built around an STR-W6052S, which is discontinued and I can't get a replacement. Also did not find a clear drop-in replacement. I wrote to Sanken but still didn't hear back from them. Since this is a somewhat common converter IC, I'd like to know if someone has had any related experience and can suggest a drop-in replacement.

[CapLeaker]

probably utsource, AliExpress, etc have these STR-W6xxxS by the bag. These STR-W6xxxS series almost look like the TOP2xxYN series.

[tfm]

probably utsource, AliExpress, etc have these STR-W6xxxS by the bag. These STR-W6xxxS series almost look like the TOP2xxYN series.

Thanks for chiming in. Yes, the TOP2xxYN series do like like the STRs, and Sanken suggests STR3A453D as a replacement. However, they only come in DIP-8 and I haven't checked the datasheet thoroughly if they perform the same.

https://www.semicon.sanken-ele.co.jp.../discontinued/

About utsource, min qty is 20.

AliExpress, etc, you are right, they are all over the place, but just as ebay, I don't trust them. This IC became obsolete for a few years now, and they are simple to design, so I believe there are a lot of counterfeits around. Main issue with those is that they generally work, but for a very limited amount of time, and quite often cause damage to other components when they decide to stop behaving as they should. Ask me how I know..... 😅

[CapLeaker]

For a few $$$ try it first. This design switcher in that package is problematic from the get go.

[lotas]

Analogs - SQT7011K, SQT8011K.
Connection diagram...