Unknown MOSFET specs datasheet

[Lostfollicles]

Hi to all.
Can anyone throw any light on a MOSFET made by Jinan Silan no: SVF4N35F...? I have tried in vain to get a datasheet from Silan but all my emails have been ignored and I cannot find any information about this device online. I assume that the device is a 4 amp 350 volt n series but would like the datasheet to confirm.
This MOSFET which I have found to be faulty is installed in a Mackie SMPS powering a ProFX12v2 mixer, Mackie have been of little help other than of course saying to buy a new power supply for it, which with VAT shipping and import duties from the USA (I live in Spain) will cost approx €150 they will also not supply a schematic as it's in currant production.
Thank you in advance for any advice on either a datasheet for the above device or if you know of an equivalent.

 

[Martaine2005]

You could try omitting the first letters like here. Then add search terms after like here.
Have a play and don't forget to check 'images'. You may spot what you are looking for.

EDIT: forgot to mention that a photo would help too.
Martin

 

[Bluejets]

4N35 is an opto coupler if that helps...