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Do CN/TW makers disguise low-ESR caps as GP?

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Do CN/TW makers disguise low-ESR caps as GP?

Postby LongRunner » September 11th, 2021, 11:33 pm

It's been a while since anything major was posted here, hasn't it :mrgreen:

I just opened up a 2002-vintage FSP (rebranded AOpen) ATX-250GT to add to my capacitor lists (currently private but can upload if requested).
While several of the output capacitors were bad as expected (already the case when I got it years ago), the few survivors still measured surprisingly low in ESR despite being Teapo SEK series (GP according to the datasheet): A 2200µF 10V (10mm diameter by 20mm tall) measured 0.04Ω, and a 3300µF version (30mm tall) even read "0.00Ω" on the Atlas ESR+. (Of course I still didn't trust them to re-use or even justify keeping, between being Teapo and their capacitance measuring over-tolerance presumably from the oxide layer thinning out)

So I wonder if Taiwanese (or Chinese) capacitor manufacturers provide the option for bulk customers to specify a different series label than what's really in the capacitors? (Possibly used in an attempt on the PSU maker's part to foil hardware clones? But also well-meaning repairers at the same time :()

I still stand by it being utterly reckless to use truly general-purpose capacitors (which Japanese GP series probably are) in place of low-ESR, of course.
But I guess this theory also explains some confusing experiences of certain BadCaps.net members (such as momaka - who to be fair is one of their nicer guys)…

EDIT: Or I suppose there's the more mundane possibility of simply specifying lower ESR than standard for the series.
Information is far more fragile than the HDDs it's stored on.

Smart people don't buy "smart" devices without very carefully weighing up the risks and benefits beforehand.

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Re: Do CN/TW makers disguise low-ESR caps as GP?

Postby Behemot » December 3rd, 2021, 4:34 pm

that capacity is fairly high, anything around these values has quite low ESR I 'tink :-/

seems that AOpen is still kicking, but totaly shifted its portfolio away from cases and PSUs :wtf:
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