panasonic fj counterfeits?

[kc8adu]

got a huge lot of leftover stock from an oem.
sprinkled in a lot of rubycon mbz were these panasonic fj
look at the bungs.
look nothing like the fc/fm i have on hand.

[kc8adu]

Re: panasonic fj counterfeits?

in the last pic the fm is on the far right.
edit.
the one on the right in the 3rd pic is a genuine fm from digikey.

[linuxguru]

Re: panasonic fj counterfeits?

The bungs in the 2nd picture from the left are wrong; the one in the 3rd pic is good, and similar to the ones in the Malaysian FJs that I have.

[kc8adu]

Re: panasonic fj counterfeits?

the codes stamped on the suspects even goes the wrong way and is a different color too.

[Phenos]

Re: panasonic fj counterfeits?

I have some Teapo's here with a panasonic vent, i removed them from my sapphire grouper mobo. (SM105c A8 03/04) Maybe somekind of an OEM product.

[Big Pope]

Re: panasonic fj counterfeits?

The bungs in the 2nd picture from the left are wrong; the one in the 3rd pic is good, and similar to the ones in the Malaysian FJs that I have.

Agree, the 2nd picture looks counterfeits more, because the cost of bang(3rd picture) is more expensive than the 2nd one.

[kc8adu]

Re: panasonic fj counterfeits?

edited post above to eliminate confusion.
the real panasonic part in these pics has full leads and the more complex bung.
often wondered about the purpose of the fancy molding there.
maybe to allow a path for venting?airspace for cooling?

[Krankshaft]

Re: panasonic fj counterfeits?

Yes I agree with BP the second cap with the simple flat bung with circles in it is probably a fake.

I've seen those cheap bungs in elite capacitors, hermei caps, and other cheap and bad brands which strengthens the fact that they are cheaper to produce since they require less rubber.

The type of bungs I see when I buy real Panasonic FCs from Digikey are in picture 3.

Trust me I know my bungs .

I always wondered why the bungs were shaped like that too?

Nippon Chemicon uses a similar design on their bungs as well.

[PeteS in CA]

Re: panasonic fj counterfeits?

The cheesy bungs with the concentric circle pattern is familiar from crap-caps, a sign to me that those are almost certainly phonies. The complex bung is to permit cleaning (usually water nowadays) under the caps after stuffing and soldering whatever PCB the cap is installed in. The FC I looked at a couple of days ago has the complex bung, as do Nichicon, UCC and Rubycon. That red date/lot code is really hard to read on the dark blue FCs and black FMs, but it also seems to be characteristic of Panasonic.

[kc8adu]

Re: panasonic fj counterfeits?

note the date/batch code printing runs lengthwise in the real ones.
and i figured the fancy bung was to avoid trapped cleaners after i posted and left the pc to go for our families thanksgiving gathering.

[kc8adu]

Re: panasonic fj counterfeits?

i just got in a dvr psu with g-luxons in it .
they have the same "bullseye"bung

[PeteS in CA]

Re: panasonic fj counterfeits?

I've seen it on Lelon and Jianghai parts (the latter smelled like really bad fish!).