in this PSU schematic, you can see on the right, close to the two schottkey diodes, a coupled inductor L15, marked as SQR1257.
You can also read the note close to it: "2_1: 25uH / 4_3: 21uH"
the only datasheet that I could find is this: http://inductor.com/media/catalog_pdf/product/sqr1242-sqr1257-sqr1277.pdf
The marking on the actual inductor is 275 (I only got a picture of it, so I cannot measure it). Link to the pic: http://cdm.link/app/uploads/2014/03/ms20kit1.jpg
But I can't find on the datasheet this marking, and 21uH or 25uH is not an option either.
So what do you think this inductor is?
also, as bonus question, what's the purpose of the MOSFET on this circuit? to me looks like it acts as switch to switch off the PSU (from the KILL signal by the CPU or by the mechanical switch), am I right?
I found those infos about that inductor, and it is a custom wound one. I could not find on Mouser a coupled inductor with 25uH + 21uH, do you think I could just use one with 22uH on both coils? for example this: https://www.vishay.com/inductors/list/product-34359/