List of Bad Cap Manufacturers

[Spike47]

Re: List of Bad Cap Manufacturers

Are Sanyo ok !

[Heihachi_73]

Re: List of Bad Cap Manufacturers

Not a capacitor, but I just came across this knockoff Panasonic battery on Reddit - "Penesamig".

https://www.reddit.com/r/crappyoffbr..._and_got_this/

[Hitto]

Re: List of Bad Cap Manufacturers

Yes, even good CRT monitor use generic capacitors on the secondary of the switching power supply section.

For example a pair of Samxon GS which have very relaxed specifications. They still measures correctly. Replaced them with low E.S.R. counterparts though.

Some CRTs from the 2000s have Elite, they fail in the secondary and develop high E.S.R. on the B+ rail (without failing).

[momaka]

Re: List of Bad Cap Manufacturers

That is the reason I said using an 85C electrolytic cap as an output cap for a switching power supply is engineering malpractice.

Well, I wouldn't say it's a malpractice, but you certainly have to know what you are doing if you are using general purpose caps for a switching power supply. Take for example CRT monitors and TVs - a lot of them use general purpose caps in their power supplies. Yet, many of them lasted 10 years or more - even the ones with dodgy cap brands. A lot of my CRTs are actually close to 20 years old now and still function properly. I've pulled caps from a few just for fun, and they tested within specs too. So again, if the designed of the device know what they are doing, they can get away with general purpose caps. But for most things built nowadays, I wouldn't count on it.

[mrmazda]

Re: List of Bad Cap Manufacturers

Enercon GS, used by Funai Corporation Inc. in its consumer electronics brand Magnavox.

[mrmazda]

Re: List of Bad Cap Manufacturers

I opened up my #1 Magnavox MDR513H DVR, my only Magnavox MDR515H DVR, and my #2 Magnavox H2160MW9A DVR to find Su'scons in place of the three bad Enercon GS 3300uF 6.3V 85° I recently reported here. These machines all have 8x12 Enercon GS 1000uF 6.3V 85° at up to 6 visible locations each, including one on each PS board. On the MDR515H the one at C1419 on the mainboard has a swollen top.

[mrmazda]

Re: List of Bad Cap Manufacturers

Electrolytic caps are not created equal, nor are the functions they perform. A switching power supply output capacitor is stressed far more than a random general purpose decoupling capacitor on a PCB. Depending on the temperature inside the TV or whatever, an 85C general purpose part might be appropriate for decoupling.

On the other hand, a switching power supply output capacitor must be low impedance or it will swiftly fail. And low impedance parts are almost always rated for 105C (I have seen a few series that are rated for 125C). Cap manufacturers just don't do low impedance parts rated for 85C.

When I searched Mouser and Digi-Key for equivalents to the bad Enercons I found all 5 major brand (Mouser) results in the 10x20 can size spec'd to materially lower ripple, were 85° rated, and classified as GP. (Digi-Key) results with at least as much ripple were all 105° and at least 25mm tall (but also classified as GP rather than either low impedance or low ESR, which it seems Digi-Key does with all 'lytics). So it seems Enercon must be publishing optimistic specs.

That is the reason I said using an 85C electrolytic cap as an output cap for a switching power supply is engineering malpractice. BTW, FWIW, I've worked in power electronics since 1980, so I am speaking from a bit of experience.

So you started back when popular consumer electronics were still designed better than to simply outlast a warranty.

[PeteS in CA]

Re: List of Bad Cap Manufacturers

Every cap I can see in the machine is 85°. I have other machines in the model series, older and newer. I opened up an older one to find Su'scon in the PS board locations of the one with bad Enercons, as well as most other locations, but 8x12 or smaller Enercons in two other locations on the PS board, and several locations on the main board. Funai is the actual manufacturer of the Magnavox-branded machines.

Electrolytic caps are not created equal, nor are the functions they perform. A switching power supply output capacitor is stressed far more than a random general purpose decoupling capacitor on a PCB. Depending on the temperature inside the TV or whatever, an 85C general purpose part might be appropriate for decoupling.

On the other hand, a switching power supply output capacitor must be low impedance or it will swiftly fail. And low impedance parts are almost always rated for 105C (I have seen a few series that are rated for 125C). Cap manufacturers just don't do low impedance parts rated for 85C.

That is the reason I said using an 85C electrolytic cap as an output cap for a switching power supply is engineering malpractice. BTW, FWIW, I've worked in power electronics since 1980, so I am speaking from a bit of experience.

[RukyCon]

Re: List of Bad Cap Manufacturers

I got a free power supply with capacitors i have very little hope in them lasting.
Brands: NL, NOAI.

[mrmazda]

Pretty sure that brand is Hall of Infamy grade. And if that 85C GP cap was an output cap for a switching P/S, that was engineering malpractice.

Every cap I can see in the machine is 85°. I have other machines in the model series, older and newer. I opened up an older one to find Su'scon in the PS board locations of the one with bad Enercons, as well as most other locations, but 8x12 or smaller Enercons in two other locations on the PS board, and several locations on the main board. Funai is the actual manufacturer of the Magnavox-branded machines.

[PeteS in CA]

Re: List of Bad Cap Manufacturers

Does Enercon belong here? Using both the menu and Google to search for it here turned up nothing good or bad. My #2 Magnavox MDR513H DVR quit. I found 3 heavily swollen Enercon GS 10x20 3300uF 6.3V 85° caps on its PS board. Replacing them with on-hand 10x25 Panasonic FR fixed it right up.

Pretty sure that brand is Hall of Infamy grade. And if that 85C GP cap was an output cap for a switching P/S, that was engineering malpractice.

[jiroy]

Re: List of Bad Cap Manufacturers

First time i see this label , Asia'x , and hope the last , all the capacitors in a Delux power supply are bulged and leaking , in a Core i5 barely five months used ...

[mrmazda]

Re: List of Bad Cap Manufacturers

Does Enercon belong here? Using both the menu and Google to search for it here turned up nothing good or bad. My #2 Magnavox MDR513H DVR quit. I found 3 heavily swollen Enercon GS 10x20 3300uF 6.3V 85° caps on its PS board. Replacing them with on-hand 10x25 Panasonic FR fixed it right up.

[PeteS in CA]

Re: List of Bad Cap Manufacturers

tele, this thread distinguishes between caps that fail and manufacturers who produce crap. You give me the right equipment and I'll cause the best 10K hours caps fail withing a couple thousand hours ... or less than a second.

The intent of this thread is to highlight and warn against producers of crap. And watch train wrecks.

[televizora]

Re: List of Bad Cap Manufacturers

Bulged rubycons...

[RukyCon]

Re: List of Bad Cap Manufacturers

Now should i use nicon or micon caps for a custom audio amp.

[RukyCon]

Re: List of Bad Cap Manufacturers

chang = trash

fencon = for low work loads like that, it'll be fine.

Ok i have a few chang caps in my collection of capacitors.

[jazzie366]

Re: List of Bad Cap Manufacturers

i opened up a 2 more 12v to 5v USB chargers
number 2 had some chang caps 22uf 35v and 220uf 10v
number 3 had some fencon caps 47uf 35v and 100uf 16v

chang = trash

fencon = for low work loads like that, it'll be fine.

[RukyCon]

Re: List of Bad Cap Manufacturers

i opened up a 2 more 12v to 5v USB chargers
number 2 had some chang caps 22uf 35v and 220uf 10v
number 3 had some fencon caps 47uf 35v and 100uf 16v

[RukyCon]

Re: List of Bad Cap Manufacturers

i opened up a cheep 12v to 5v USB charger and found 2 interesting capacitors
brands capacity and voltage
EU cap 4.7uf 50v
HDS 100uf 16v
i will try to take photos of them