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I've found this MOSFET-shaped component inside a Dell laptop power supply (I've lost the case so I can't tell you any details, sorry):

Photo

The problem is that I can't find any datasheet for it anywhere.

I will try and describe it in terms of the lines of text on the front:

  • Line 1: C6312
  • Line 2: A picture of two diodes facing each other.
  • Line 3: 004

For the most part, it looks exactly like a MOSFET, metal back etc, and it is also mounted on a heat sink if that is useful.

Through some research I think I've narrowed it down to a Schottky barrier rectifier stack based on the symbol of the two diodes facing each other.

This isn't super serious or urgent, but I'm really interested to know what it is!

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    \$\begingroup\$ A photo would help. If not, then specify the actual package (e.g. TO220) because MOSFETs come in quite a few different packages. \$\endgroup\$
    – Jack B
    Commented Aug 5, 2017 at 11:38
  • \$\begingroup\$ I just added a photo which should help. \$\endgroup\$
    – Scrapper
    Commented Aug 5, 2017 at 11:46
  • \$\begingroup\$ That doesn't seem to be part of the original design, but a hack or a bodge added as an afterthought. Are you sure the power supply had not been serviced/hacked before? \$\endgroup\$
    – LorenzoDonati4Ukraine-OnStrike
    Commented Aug 5, 2017 at 12:05
  • \$\begingroup\$ I'm 100% sure it's never been opened before. I got it off my dad who was throwing it away and he's a super safety freak. He was the only owner and would never open it, let along modify it. On the other half of the PCB, it was also heatshrinked along with a few other wires, so it had to have been part of the original design. Plus it has designated holes to solder the wires to. \$\endgroup\$
    – Scrapper
    Commented Aug 5, 2017 at 12:17
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    \$\begingroup\$ Probably it is more likely some form of dual common-cathode rectifier diode (similar to this). \$\endgroup\$
    – Tom Carpenter
    Commented Aug 5, 2017 at 12:22

2 Answers 2

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I think you are on the right track, but the 12 in the part number is a red herring, IMO. Probably a date-code.

After a bit of detective work, the most likely candidate I found was this ESAC63-004 common cathode Schottky diode array:


enter image description here

From what you say, it could be the rectifier of the output of the power supply, as can be seen in an image of a DELL power supply found here (emphasis on the image is mine):

enter image description here

EDIT

Another datasheet for the same part can be definitive (yellow highlighting is mine):

enter image description here

[...]

enter image description here

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I believe it is a Silicon Diode, you might want to check this datasheet

http://pdf1.alldatasheet.com/datasheet-pdf/view/218943/FUJI/ESAC63-004R.html

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