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Aug 5, 2017 at 22:23 comment added pericynthion The answers have done a good job of identifying this one, but it's important to be aware that lots of different components can come in a TO-220 package, not just MOSFETs. Some common ones would be BJTs, IGBTs, SCRs, diodes, resistors, voltage regulators, etc.
Aug 5, 2017 at 20:36 history tweeted twitter.com/StackElectronix/status/893933717567275009
Aug 5, 2017 at 17:20 history edited Kevin Reid CC BY-SA 3.0
edit photo for readability (increase brightness, sharpen, correct color temperature)
Aug 5, 2017 at 13:32 history edited Transistor CC BY-SA 3.0
Edited title to assist future user search.
Aug 5, 2017 at 12:51 history edited LorenzoDonati4Ukraine-OnStrike CC BY-SA 3.0
Fixed general formatting and typos. Added relevant tags. Cleaned up the title.
Aug 5, 2017 at 12:25 answer added HVK timeline score: 0
Aug 5, 2017 at 12:23 answer added LorenzoDonati4Ukraine-OnStrike timeline score: 8
Aug 5, 2017 at 12:22 comment added Tom Carpenter Probably it is more likely some form of dual common-cathode rectifier diode (similar to this).
Aug 5, 2017 at 12:17 comment added Scrapper 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.
Aug 5, 2017 at 12:05 comment added LorenzoDonati4Ukraine-OnStrike 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?
Aug 5, 2017 at 11:46 comment added Scrapper I just added a photo which should help.
Aug 5, 2017 at 11:45 history edited Scrapper CC BY-SA 3.0
added 87 characters in body
Aug 5, 2017 at 11:38 comment added Jack B A photo would help. If not, then specify the actual package (e.g. TO220) because MOSFETs come in quite a few different packages.
Aug 5, 2017 at 11:35 history asked Scrapper CC BY-SA 3.0