Please help with an equivalent IC for this burnt model in a PSU

[highcap]

The machine I'm trying to restore is quite unique, and after cleaning this PSU I noticed that failed IC.

As I can't find that exact model on sale, can someone help with getting an available equivalent?

Thank you!

H11A V2A 9434

[wraper]

It's a H11AV2A optocoupler. I have a big doubt that smoke came out of this part rather than something else. And if it's really failed explosively like this, it did not happen by itself and something else caused it instead.

[fzabkar]

Pin #3 is not connected.

https://www.farnell.com/datasheets/172176.pdf

[highcap]

That's some bad news then... This means this optocoupler can never fail by itself?

[fzabkar]

That's some bad news then... This means this optocoupler can never fail by itself?

ICBW, but I think that the failure mode of optocouplers is that they become "weak" over time.

[minsik]

Very nice clean power supply. Re the optocoupler you can remove it and test externally. Breadboard it and a small power supply, 1-15V maybe, add a load resistor to the output collector from the dc supply, emitter to ground, apply some limited mA to the input diode and does the output switch to ground? no its dead and likely o/c, yes its working.  Normally optos are on or off and thus disapate only small amounts of power= no heat. Maybe look anything under the pcb that could get that hot to  discolour the pcb? does the output go through those tracks that might explain the pcb heating, or was it something else nearby?
Minsik.

[coromonadalix]

they become weak  but not to explode  like this  or spit like this,  something very strong pass thru it ?? 

and may be an indicator of a major failure,  no schematics = no good chances of repairing it ?

[Muxr]

Yeah, quite odd for an octo to be charred. Maybe a lightning strike?

[highcap]

You will be surprised about its shape from before I cleaned it, will add pics

Also the exploding trace can be observed on the dust near the octocoupler.

I will probably need to investigate other bits of the PSU, but I really don't know where to start. I only know basic electronics.

[inse]

That's 🤢 !
In which environment did the device reside?
Probably there was a flashover due to the dust layer, but then I would be looking for damage on the downstream circuit…

[highcap]

That is powering up hard drives module of an industrial computer.

It probably ran 24/7 for many years.

Other modules/components does not look bad so I will probably have a hard time figuring out the culprit...