Genuine Rubycon MBZ or not?

[Behemot]

One customer of mine wants to have some boards recapped quickly so I need something into VRM as my Samxon GC stock is almost gone. But I am going to take something from Joe what is not manufactured yet so that will take at least a month.

I came across these at eBay, but I am nto quite sure if they are genuine. The fing is, msot MBZ are blue but I may have seen some black earlier. Is that possible these are only older and Rubycon changed the colouring? These are for very good price so they may be fake, on the other hand despite what's written there, they may be jsut several years old what will be still good buy for that money

[mariushm]

Re: Genuine Rubycon MBZ or not?

http://www.google.ro/search?q=rubyco...=1920&bih=1000

They all seem to be blue indeed. I wouldn't buy them, the writing seems cheap.

[Behemot]

Re: Genuine Rubycon MBZ or not?

Yeah but these ones should be fine I guess. They are blue, K vent…everything as original Rubycon

[mariushm]

Re: Genuine Rubycon MBZ or not?

You're assuming that's what you're going to get.

I'd assume the text "Photot only display of goods." in the picture is equivalent to "Photo is for illustration purposes only".

[Behemot]

Re: Genuine Rubycon MBZ or not?

Yeah, but well, almost half of third thousand feedbacks, 99,9 % positive. Do you think this seller will send me some shit instead of the caps?

[mariushm]

Re: Genuine Rubycon MBZ or not?

Well, most people don't really know what they're buying.
A lot of his deals are also for small stuff... like 5 capacitors of a certain size, people would just try install them and when it works they give him positive rating.

I've been checking his reviews and found for example this one:

http://www.ebay.com/itm/70PCS-470uF-...item519a590e0f

Well, they seem to be indeed Panasonic FC but it's not really audio capacitors - they may be good enough for that as well but the datasheets don't say that:

These 70 pieces were sold for 25$ + 4$ shipping... so actually about 28$ because shipping from China is not that expensive. Well, I can go on farnell.com and get them :

http://ro.farnell.com/panasonic/eeuf...0uf/dp/1848452

Chaning from my currency, it works out at about 402$ for 1000 pieces, or 28$ for 70 pieces but as he has 50 sets available (3500pcs) and as he probably orders them straight from a distributor, I can see how can make a 5-10$ profit on them so they could be genuine.

But those Rubycon capacitors ... I just don't see it. 130 pieces for 25$ just seems too low to be genuine.

[Behemot]

Re: Genuine Rubycon MBZ or not?

Consider MBZ are discontinued since 2009 (I think - thats information I found here on forums). If their storage time has expired some time ago, they may be from some storehouse sellout. Their actuall capacitance will probably be arround 2500 uF, but for that price…I will risk it. Will also try to measure actual capacitance and ESR than.

[severach]

Re: Genuine Rubycon MBZ or not?

For less money you could have Panasonic FJ.

I try to find sellers most likely to be selling overruns. Dell orders 50,000 boards, 4 caps per board, and the builder orders 220,000 capacitors. That's 20,000 top of the line at rock bottom prices capacitors with nowhere to go. The builder can't save 'em all. Mouser has quantity 10,000 Panasonic FM 3300uf 6.3v at $0.252 per ea so $0.200 in small quantities is not unreasonable with Dell's direct from Panasonic volume discount, especially at dumpster prices.

Here's what I bought from janeh2100.

Rubycon MBZ 2200uf 6.3v 0626: 2056uf, 2094uf, 2092uf, 2100uf, 2066uf
Panasonic FJ 3300uf 6.3v 72IIIJB: 3448uf, 3521uf, 3510uf, 3520uf, 3448uf
Panasonic FL 1800uf 6.3v 78IIIG2: 2060uf, 1865uf, 1969uf, 2080uf, 1948uf

The Panasonic aren't high from age. They are high because Panasonic has a habit of providing more uf than marked. If capacitors read high from age then they all would but they don't. Only Sanyo, Panasonic, and cheapos about to die.

[mockingbird]

Re: Genuine Rubycon MBZ or not?

Is janeh2100 a selective counterfeiter?

He has some nice stuff. I may use him rather than Mouser the next time I shop.

[yyonline]

Re: Genuine Rubycon MBZ or not?

I've seen black/white lettering MBZ before. The black/white are PET sleeves. The regular purple/gold are PVC sleeves.

Nothing in the eBay photo indicates a fake, but the photo is only from one angle and there is no guarantee what the seller sends will match the photo.

I've used new old stock Rubycon as old as '03. I have a stash of a few hundred 8x23mm 6.3V 820uF MBZ (manufacture date 0343-0350) that were a common custom size on P4 boards. I also have a lot of new old stock Panasonic and Sanyo in my stash. None has ever read significantly high or low on my meter, and I've never had any come back with issues.

[qiqi1021]

Re: Genuine Rubycon MBZ or not?

Long time lurker, first time poster. I've recently bought some Rubycon MBZ caps from janeh2100, and am wondering if they're genuine or not?

They are black and white but came out purplish thanks to my phone camera.

Here's some pics:
http://i.imgur.com/FmcmF.jpg
http://i.imgur.com/aahlT.jpg
http://i.imgur.com/dT8fX.jpg

[Topcat]

Re: Genuine Rubycon MBZ or not?

From those pics, they *appear* legit. Manufactured the 18th week of 07, they're just NOS someone is selling off.... If they're fakes, they did a good job on those.....if you want to guarantee genuine parts, buy from reputable vendors and quit penny-pinching on fleabay....if people did that, we wouldn't have threads like these.

[retiredcaps]

Re: Genuine Rubycon MBZ or not?

quit penny-pinching on fleabay

For non USA customers, shipping and handling is signficant enough to consider other channels like ebay.

I recently got genuine new old stock MBZ for less than 6 cents each + free shipping. I'm confident from examining them and doing some uF measurements that they are the real thing.

[PCBONEZ]

Re: Genuine Rubycon MBZ or not?

Isn't part of it that the Blue MBZ are one sleeve material and the Black MBZ are another?
.

[PCBONEZ]

Re: Genuine Rubycon MBZ or not?

Is janeh2100 a selective counterfeiter?

He has some nice stuff. I may use him rather than Mouser the next time I shop.

No, a Liquidator.
Probably doesn't have the slightest idea if what he's selling is legit or not.
.
If you find 10 sellers with fake caps on ebay I'd bet 8 or 9 don't even know they are selling fakes.
That's part of the problem buying there.
.

[qiqi1021]

Re: Genuine Rubycon MBZ or not?

From those pics, they *appear* legit. Manufactured the 18th week of 07, they're just NOS someone is selling off.... If they're fakes, they did a good job on those.....if you want to guarantee genuine parts, buy from reputable vendors and quit penny-pinching on fleabay....if people did that, we wouldn't have threads like these.

Thank you. I got 20 of these for $6.50 from janeh2100, otherwise I would have had to pay $25 + shipping from the local stores. Everything is expensive here in Australia.

[tgab]

Re: Genuine Rubycon MBZ or not?

Hi!

I bought some Rubycon caps on Ebay. I guess they're counterfeit because the ESR value does not match the value in the datasheet.

Rubycon MBZ 10V/1000uF 8x16mm, blue colour, K-vent, T0429 date code, measured ESR is 49-52 mOhm (should be 28 mOhm)

Rubycon MCZ 6.3V/1800uF 8x20mm, black colour, K-vent, T0635 date code, measured ESR is 32-35 mOhm (should be 12 mOhm)

What do you think?

[tgab]

Re: Genuine Rubycon MBZ or not?

Rubycon MCZ 6.3V/1800uF 8x20mm, black colour, K-vent, T0635 date code, measured ESR is 32-35 mOhm (should be 12 mOhm)

Rubycon MCZ 6.3V/1800uF

[ReeceyBurger123]

Re: Genuine Rubycon MBZ or not?

Hi!

I bought some Rubycon caps on Ebay. I guess they're counterfeit because the ESR value does not match the value in the datasheet.

Rubycon MBZ 10V/1000uF 8x16mm, blue colour, K-vent, T0429 date code, measured ESR is 49-52 mOhm (should be 28 mOhm)

Rubycon MCZ 6.3V/1800uF 8x20mm, black colour, K-vent, T0635 date code, measured ESR is 32-35 mOhm (should be 12 mOhm)

What do you think?

I have used that seller before and all the caps I received were in spec and were genuine, maybe you had old stock ?

[Per Hansson]

Re: Genuine Rubycon MBZ or not?

Those caps are so old that they probably require reforming before they will be in spec.
You can search the forums for details on how to do it, it's been mentioned before...