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Old 02-22-2017
Stefan Payne Stefan Payne is offline
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Default Capacitor Temperature in modern PSU...

I'm measuring the temperatures of caps in a couple of PSUs right now.
Sadly I only have a rather cheapish themperature measurement thingy with a bit of heatshrink over the thermocouple. So take it with a bit of salt, as usual.

I've measured so far: a 400W FSP made thing, under ~415W Primary and measured around 65C between secondary heatsink and the coil. That's rather hot. So I'd expect the caps to be rather hot. And they are. 46C...

So because I've got nothing else to do and am bored I took another unit (850W Bitfenix Whisper M, around 630W primary load) and put the thermocouple between the 4 polymer caps. Because I thought they'd get hot. And they are. 45C...

So my Room Temperature right now is around 18C, +/-3 or 4C...

What do you think?
Do you have any measurements of the temperature of caps??

dit:
Corsair HX750i, between upper +12V rectifier module and left cap (mod cables to front): ~40C...
Even on the Silverstone SX700-LPT the cap doesn't get 50C hot...


Though all Tests were done at about room temperature...
And not the specified 40C or more this PSU are all specified for (at least)...

Last edited by Stefan Payne; 02-27-2017 at 06:11 AM.
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  #2  
Old 02-23-2017
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Quote:
Originally Posted by Stefan Payne View Post
. So take it with a bit of salt, as usual.
Of course, we know you.

You also measured the temp in power supplies which are known for failed capacitors?

Which FSP for example do you use?
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Old 02-23-2017
Stefan Payne Stefan Payne is offline
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No, for that I have to move out of my room and use the (shitty) stairs :P
I just used what I had lying round here...

And the first one of the bunch was interestingly an FSP unit by the way...

But it's a good idea, gonna do that later, when I'm back from the university Hospital....
But the ones you mentioned used 8mm capacitors (usually around 1000h Lifetime with lower end Cap series and usually way worse ripple current ratings, if I remember correctly)...
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Old 02-24-2017
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Delter Delter is offline
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Were you testing HEXA+ 400W?
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Old 02-24-2017
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Funny thing about PSUs these days... they don't generate much heat.
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Old 02-24-2017
Stefan Payne Stefan Payne is offline
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Funny thing that the coil on the secondary side was the hottest in at least two of the tested PSUs (the Xilence and the FSP)...
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Old 02-24-2017
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Japanese coils?!?!
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Old 02-24-2017
ridgid13579 ridgid13579 is offline
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Japanese coils?!?!
Japanese solder?!?!
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Old 02-24-2017
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Japanese solder?!?!
Actually......
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Old 07-25-2017
dracarus88 dracarus88 is offline
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sorry...if this sounds like a noob question, but are jap capacitors really better? than say like...caps made in taiwan? or ones made in 'merica?
and if so, better in what capacity? (See what i did there?? lol)
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