Are these capacitors Rubycons, or did I get scammed? - Page 1
Forum section: electronics / repair

author: mathsquid
author_rank: Frequent Contributor
timestamp: November 15, 2014, 04:51:41 pm
content: I purchased some capacitors on Ebay to repair a monitor. The ad said that the caps were Rubycons, and the picture on the ad showed capacitors with the rubycon logo. They just arrived, and there is no Rubycon logo on them. I'm attaching two pictures below of the capacitors that I received.To me this looks like a clear case of bait and switch, but contact them or leave negative feedback, I wanted to ask here if there is any chance that these are actual Rubycons.ETA: The seller I bought them from has 100% Positive feedback, with a score of 400, and this was a $5 purchase including shipping.

author: amyk
author_rank: Super Contributor
timestamp: November 15, 2014, 05:15:16 pm
content: That's the logo forNippon Chemi-Con, which if they're real is another good Japanese brand comparable to Rubycon. I'd still ask the seller.

author: mathsquid
author_rank: Frequent Contributor
timestamp: November 15, 2014, 05:30:19 pm
content: Quote from: amyk on November 15, 2014, 05:15:16 pmThanks for the help. I'm going to use them, but I sent a message to the seller.

author: AKM
author_rank: Contributor
timestamp: November 15, 2014, 06:07:46 pm
content: Those are definitely KY series from Nippon Chemi-Con(if genuine). Without knowing which series and from where you purchased(post the ebay listing), we can`t say if those are worse or better; but they shouldn`t have sent you anything other whithout contacting you first.

author: janengelbrecht
author_rank: Regular Contributor
timestamp: November 15, 2014, 06:27:58 pm
content: Its like sending you a Mercedes when you ordered a LambourginiWell what is it all about ? Its ebay - 99% fraud anyone knowsAbove 1 billion chineese people trying to make a living

author: wraper
author_rank: Unknown
timestamp: November 15, 2014, 06:29:32 pm
content: They are Nippon chemi-con, post a photo of the top. Fake ones often have a wrong vent shape, right shape don't guarantee them to be genuine, though.Never buy the capacitors on ebay if you do not want fakes to fail on you.

author: mathsquid
author_rank: Frequent Contributor
timestamp: November 15, 2014, 10:27:35 pm
content: I contacted the seller. He said that it was a mistake at a warehouse and he offered to send me some rubycons or give me a refund. He had plenty of feedback for rubycons that said "item as described," so I figure it's an honest mistake. And the caps I got seem fine, so I told him not to worry about it.

author: Vito_R
author_rank: Regular Contributor
timestamp: November 15, 2014, 10:45:01 pm
content: If you have an esr meter you can try testing them to see if they read a higher ESR value then what the manufacturer's datasheet specs indicate. Some of those crappy chinese fakes test much higher then what they should be. It is however still never a guarantee of a genuine cap. I always source my caps from Digi-key, mouser, or another other large reputable parts distributor just to minimize the possibility of getting fakes. The problem of counterfeit parts scammers in china is increasing every year and little is being done about it. Some of them are even getting into larger supply chains without being caught. It's a big headache for the industry. Now I saw how the Chinese are even counterfeiting prescription drugs with fakes that have little to no medicinal value and can be downright lethal for the patient. This is really getting out of hand now when people's lives are at stake.http://www.reuters.com/article/2013/12/15/us-china-crime-fake-idUSBRE9BE01P20131215

author: mathsquid
author_rank: Frequent Contributor
timestamp: November 15, 2014, 11:47:52 pm
content: Quote from: Vito_R on November 15, 2014, 10:45:01 pmYes. I checked the ESR and capacitance before I soldered them in. The two I tested has ESR of .04 and .05 ohms. I don't know what they are supposed to be, but the reference on my meter said something like .2 or .5, so I went with it.

author: Vito_R
author_rank: Regular Contributor
timestamp: November 16, 2014, 01:07:12 am
content: Quote from: mathsquid on November 15, 2014, 11:47:52 pmSounds like they are good in terms of esr. If you have the model codes or series try to google the datasheets and compare.

author: amyk
author_rank: Super Contributor
timestamp: November 16, 2014, 01:14:41 am
content: Quote from: mathsquid on November 15, 2014, 11:47:52 pmDatasheet:http://www.chemi-con.co.jp/e/catalog/pdf/al-e/al-sepa-e/004-lead/al-ky-e-140701.pdf10v 1000uF is, depending on whether you bought the tall and skinny or short and fat size, 0.060 or 0.069 ohms so these are well within spec.