Fake caps? (pic heavy)

[cpt.charlie]

Here i have a few caps that i got at aliexpress some years ago most seem original to me, what do you think?

nichicon VR(M) 2200 16V (in tape) --> original to me but no low ESR model
nippon chemi-con KZG 1500 16V (in tape)--> original to me, but unreliable series
Rubycon ZL 470 25V and 1000 10V (in tape)-->original to me, good for PSU
nippon chemi-con KY 220 35V and 330 25V (in a bag)-->original to me, good for PSU
nippon chemi-con KZH 680 25V (in a bag)-->FAKE rubber base without markings

All caps seem to meet the specs, even the one i think is fake (at least when unused)

[Wester547]

Re: Fake caps? (pic heavy)

The Rubycon and Nichicon don't look like counterfeit. The KZG could actually be counterfeit too, but I'm willing to bet counterfeit KZG are better than the real thing. Aliexpress is about as bad as eBay and Amazon, with respect to counterfeit caps. Best to stick to authorized distributors, which will immensely lower the chances of counterfeit caps.

[ChaosLegionnaire]

Re: Fake caps? (pic heavy)

at least the sleeves on yours look intact. the suncon wg i got off aliexpress had the sleeves flapping around on top around the vent while others had the sleeves flapping around on the bung. either they are genuine factory rejects because the sleeve wasnt formed properly around the cap case (the sweatshop worker doing the sleeving was a nub) or someone resleeved them and did a terrible job.

[RukyCon]

Re: Fake caps? (pic heavy)

Lots of them look real but i wouldn't risk putting them into anything.

I have a few fake sanyo [suncon] capacitors.

[cpt.charlie]

Re: Fake caps? (pic heavy)

I have checked my purchase history and the seller is this one:

https://es.aliexpress.com/store/1596219

IF it helps......

[ChaosLegionnaire]

Re: Fake caps? (pic heavy)

yepp ultimate electronics store is where i got mine from too.

i checked the capacitance, vloss and esr using a 12864 gm328 esr meter that i also got off aliexpress and the caps i got all tested within spec. it could be genuine caps, some of which are factory rejects or really good fakes. what i cant test with the esr meter is how long the caps will last in actual use... that is the only definite indication of real or fake.

[budm]

Re: Fake caps? (pic heavy)

https://www.badcaps.net/forum/showpo...3&postcount=17
You have at least two bad caps already.
BTW, do not post the same thing in many threads, should start a new thread in the Audio section.
https://www.badcaps.net/forum/showth...053#post741053

[eccerr0r]

Re: Fake caps? (pic heavy)

I was looking at my fake cap stockpile again, this time at a 10V 2.2mF Sanyo WG. I was testing the leakage on my Sencore and noticed that the leakage kept going up and up (capacitance is within spec as well as ESR). Each charge/discharge cycle the leakage got worse... I wonder what the failure mechanism within the cap is... almost seems like something is plating out.

Might need to build a cap stress tester and make a video of them exploding under "normal" situations...

[cpt.charlie]

Re: Fake caps? (pic heavy)

Try to reform the cap for a few hours and test again, maybe the cap has been for a long time in the shelf.