Bad Fake? Nichichon TMV 4v 680uF Caps

[Yatti420]

Hey everyone..

Was going through everything I had on hand took these out of storage.. wrapped in bubble wrap.. They could of been crushed but I'm not sure.. No vents on top.. Cans look like an oval almost..

I also have a KZG Y vent going to garbage aswell..

[mariushm]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

No, they're 4v rated in a small can size, so they don't have enough electrolyte inside that would cause enough pressure to blow up. Therefore, there's no need for vents on such small capacitors.

[ben7]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

Nope.

Those are actually Nippon-chemi-con TMV series capacitors.

Did you have them in an attic? Looks like they got some heat damage, including the bigger capacitors too! Some of the little ones have their bung (rubber seal on the bottom) pushed out, or they are leaking.

[ben7]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

No, they're 4v rated in a small can size, so they don't have enough electrolyte inside that would cause enough pressure to blow up. Therefore, there's no need for vents on such small capacitors.

No.
No No No NO LOL

Those small caps can still blow up! They don't have a vent though because they are small enough that when there is a failure, it is not catastrophic enough to destroy everything around it. Big can sized capacitors, when they blow up, can be really dangerous, therefore they have a safety vent.

[Yatti420]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

My mistake and yes thinking about it they could of taken heat damage.. I got a bunch of rubies and sanyos which are ok.. They are all destined for the trash.. Yes my mistake Nippon Chemi-con..

[lti]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

TMV and KZG are bad series and fail with no use, as your TMVs have.

I have a cap that is crushed like the second one from the right in picture 4, but it is still sealed and tests good. I bought it at Radio Shack and never noticed it was crushed until I got home and took it out of the bag. It's in some really cheap and crappy computer speakers now.

[Yatti420]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

I don't have anything to test with at this moment..

Both my TMV and KZG are in the junk pile..

[lti]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

Yes, those are junk. The two crushed ones are leaking, and I see two more in your pictures that are bulging from the bottom. Those same caps fail a lot on motherboards.

[theokretes]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

KZG installation instructions:
Step #1, open garbage can lid
Step #2, insert KZG into garbage opening
Step #3, close lid of garbage can

You have now installed your Chemicon KZG :p

In all seriousness, KZG aren't good to have lingering on your motherboard. They aren't so stable. I have some mobos yet to get to with them, but yeah....

[ben7]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

KZG installation instructions:
Step #1, open garbage can lid
Step #2, insert KZG into garbage opening
Step #3, close lid of garbage can

You have now installed your Chemicon KZG :p

In all seriousness, KZG aren't good to have lingering on your motherboard. They aren't so stable. I have some mobos yet to get to with them, but yeah....

They, along with the KZJ, don't like heat as much as other brands. I think they are both discontinued now.

All capacitor manufacturers have a dud series or two

[kc8adu]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

i made a video of me dumping a bunch of brand new kzg.
they were no good even in well cooled power supplies.a friend volunteered to test some.the ones on +5stby and+3.3 died in a few months.

KZG installation instructions:
Step #1, open garbage can lid
Step #2, insert KZG into garbage opening
Step #3, close lid of garbage can

You have now installed your Chemicon KZG :p

In all seriousness, KZG aren't good to have lingering on your motherboard. They aren't so stable. I have some mobos yet to get to with them, but yeah....

[LLLlllou]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

All capacitor manufacturers have a dud series or two

Except Panny and Sanyo/Suncon . . . so far spotless record.

[Wester547]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

Sanyo's WF series is notorious for failing. Just search for them.

So Panasonic wins...

KZG/KZJ/KZV/TMV/TMZ/TMJ are indeed all true crap. They fail on their own because something is chemically (internally) wrong with their electrolyte. I find it interesting how Nichicon only really had two dud series for only a limited time and a single shift (HM/HN) but they addressed that problem relatively quickly. KZG and all its variants that Chemi-con produced lasted from 2003-2011, was it? There have been some random KZH failures in some 800W Delta power supplies documented in this forum as well...

Otherwise, there were Japanese capacitors from the 1980s-1990s that had insufficient seals (bungs) so they would eventually give away and leak... (even Panasonic had that problem) or the problem with unstable quaternary ammonium salts... but those capacitors were well out of production before this millennium. There have been some bad batches of Rubycon MBZ/MFC/MCZ spawned as well, but I wonder if those are just fakes... sometimes it's hard to tell...

To answer the OP more directly, however, TMVs aren't fake, they're just garbage.

[c_hegge]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

So Panasonic wins...

Yup. Panny the only brand I've known to survive several years torture in Dell SX280 roasting ovens.

[Yatti420]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

I like Rubies / Sanyo.. Those caps all went to the trash..

[ant3202]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

Chemicon only I consider their polymer... others, like KZG, KZJ, I tends to stay off...
Only Series I might consider is their KZE.

Panasonic and rubies are often my choice.

[ben7]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

Chemicon only I consider their polymer... others, like KZG, KZJ, I tends to stay off...
Only Series I might consider is their KZE.

Panasonic and rubies are often my choice.

Yeah, I agree with the KZG and KZJ.

I like the KZE, KY, LXZ, LXY, LXV, SMG, and SMQ series from NCC.

[Pentium4]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

KY are my favorite by Chemi-Con. Ideally I like to use Rubycon and Panny, but I think you get the most bang for your buck with KY, they seem to be a little cheaper but still have fantastic quality

[LLLlllou]

Re: Bad Fake? Nichichon TMV 4v 680uF Caps

Sanyo's WF series is notorious for failing. Just search for them.

Never seen a bad (or good) WF, ran into close to a billion pristine WGs though. Don't think I've EVER had a bad WG.