Unidentified NCC Polymer Capacitor ("6d")

[mockingbird]

This inverter board comes from a 2007 Sony Bravia with a cracked panel. PSU has some nice caps (KZH, ZLH - Though they saw fit to sneek in a few Nichicon VR series in there as well).

Does anyone have any idea which series these NCC Polymers are?



(See attachment for higher res photo)

[chozo4]

Re: Unidentified NCC Polymer Capacitor ("6d")

I could be horribly wrong but the closest match I could find based on UCC's datasheets I could find seems to match the UCC PSG series radial polymers. The example they show (replacing the series letter in place of the logo) never seems to match up to the actual product they put out. I myself have some PSA polymers without the logo at all and an A after the numbering. Most of their PS(x) series don't even support 25v so it was slim pickings between the choices which narrowed things down.

[Almighty1]

Re: Unidentified NCC Polymer Capacitor ("6d")

I have a question, when looking at capacitors that don't have a heatshrink such as the above, how does one tell if it's a aluminum electrolytic or a polymer cap?

[SteveNielsen]

Re: Unidentified NCC Polymer Capacitor ("6d")

You must mean "heatsHrink" right? I don't recall seeing any caps with heatsinks

I think it's by conventional usage really, modern electrolytics tend to have the heatshrink labeling while the polys do not.

[Almighty1]

Re: Unidentified NCC Polymer Capacitor ("6d")

SteveNielsen, exactly! I remember someone posted a picture of aluminum caps without the heatshrink and someone said it was aluminum electrolytics and not polymer.

[chozo4]

Re: Unidentified NCC Polymer Capacitor ("6d")

SteveNielsen, exactly! I remember someone posted a picture of aluminum caps without the heatshrink and someone said it was aluminum electrolytics and not polymer.

There are occasionally aluminum electrolytics that are sleeveless. Easy to spot as they look like polymers but have the vent etchings on the underside of the cap which are visible from the top.

To avoid some confusion though, polymers and electrolytics are both made from aluminum cans. Just different internals.

[Almighty1]

Re: Unidentified NCC Polymer Capacitor ("6d")

chozo4, thanks, got any pictures of what the vent etchings look like? There are polymers that I thought was electrolytics as it had the sleeve, namely a Sanyo OS-CON 25v 2.2uF.

[chozo4]

Re: Unidentified NCC Polymer Capacitor ("6d")

chozo4, thanks, got any pictures of what the vent etchings look like? There are polymers that I thought was electrolytics as it had the sleeve, namely a Sanyo OS-CON 25v 2.2uF.

The OSCon's are also polymers just no vent etchings. If they are the purple sleeve ones I believe if I'm correct those were the early series OS-Con polymer lines by Sanyo.

This picture following is a good example of a sleeveless electrolytic. Notice the bump-lines at the top showing the etchings for vents on the underside. These aren't as common and usually were used often on budget line graphics cards causing them to blow early under stress. Had one happen on a card myself long ago.. was like a gunshot went off spraying paper-like electrolyte everywhere. Looked like someone sneezed dry paper pulp all on the outside.

[Almighty1]

Re: Unidentified NCC Polymer Capacitor ("6d")

Thanks chozo4, learn something new every day.... Didn't realize polymers didn't have vent etch lines.

Not sure if the Sanyo OS-CON Polymer with the purple sleeve is a early series or not but I noticed it's on the daughterboard as seen in the first attached picture of a recently failed PC Power & Cooling Turbo-Cool 450ATX power supply except I can't find a suitable replacement as it's 2.2uF 25v, the capacitance is the hard part since Panasonic took over Sanyo and the OS-CON's are under their name except 6.8uF is what's they have available. Do Polymer caps actually bulge? The middle capacitor on a Adaptec 39320A-R UltraSCSI Raid controller I took out a few days ago seems to have a bulge at the top in the capacitor at C5, not sure what brand of cap that is either and this is a polymer I think as it doesn't have the vent etches.

[mockingbird]

Re: Unidentified NCC Polymer Capacitor ("6d")

chozo4 - thanks for doing some investigating...

I checked the datasheet, the dimension isn't there. These may have been a custom run for FDK...

[budm]

Re: Unidentified NCC Polymer Capacitor ("6d")

I would think the lytics will have rubber bung on the bottom to seal in the electrolyte.

[Almighty1]

Re: Unidentified NCC Polymer Capacitor ("6d")

Was just looking at another post and this one is a aluminum electrolytic but it doesn't seem to have the etch lines either.

https://www.badcaps.net/forum/showthread.php?t=41389