cap brand identyfication - Page 1
Forum section: electronics / beginners

author: kokodin
author_rank: Regular Contributor
timestamp: March 15, 2017, 04:10:55 pm
content: Hello i have a question todayI was fixing my old crt tv and i decided to make compleete recap for all electrolytic capacitors. Well tv kind of work, but it will be 30 years old next year and i wouldn't want to see any smoke before then.So i went online and bought a bunch of caps, i kept to mostly known brands for bigger or high voltage ones (Rubyco,Elna Nichicon) for smaller ones below 100uF and 25V i just bought whatever they had, because most of the smaller caps were advertised as "audio caps" and i didn't want any snake oil so i ended up with a buch of daewoo caps. At least a brand i know and not generic black ones without any logo on them.But something isn't right with one of those bigger caps. I might be paranoid, but i thought, before i put them in i ask wiser people about their opinion.Caps in question are suposed to be Nichicon Chemi-con 470uF / 50vwhat they are i am not sure, they have JAPAN printed on them, small font capital leters, next word is NRSA, CE85*C, 0035 Some kind of "Nc" logo and cap voltage and capacityI am concern, because they measure a little low , (on ut139c non the les) 430-450uF range. They might be just old or unformed but who knowsI also have few TEAPO caps 470uf /63V but since oryginal caps in circuit were all 35-40V , 63V seems a little bit much.What do you think?

author: tpowell1830
author_rank: Frequent Contributor
timestamp: March 15, 2017, 04:25:09 pm
content: Some pictures of the nichicon might help to authenticate. Sounds low.The voltage rating, you always want to buy same voltage rating or higher, so, since the voltage rating is higher on ones you mentioned, no problem.

author: kokodin
author_rank: Regular Contributor
timestamp: March 15, 2017, 04:48:49 pm
content: front , back and a tape packageyou should be albe to see all the printstop can is cut in K shape i did not made photo of thatwraping is really deep dark green, it look much different on a photo

author: wraper
author_rank: Unknown
timestamp: March 15, 2017, 04:48:59 pm
content: Those are Nic components, not nichicon. Tolerance for most of electrolytic capacitors is +/-20%. On top of that, measuring capacitors with multimeter is nearly useless to check them. When capacitors become old without voltage applied and insulating oxide layer becomes thinner, capacitance actually rises, not drops. Everything in 396uF - 564uf region is within spec

author: kokodin
author_rank: Regular Contributor
timestamp: March 15, 2017, 05:15:20 pm
content: thanks for making it clear that the seller lied to me :]are those caps any good? i know almost any capicitors would work and that they are in specs but i don't know much about brands and everything i know is mostly find online . I have bad experience with cheap caps from the past, they worked but not as long i would likewell all the other caps seems what they were to be

author: wraper
author_rank: Unknown
timestamp: March 15, 2017, 05:45:28 pm
content: They are ok. Never buy parts on ebay or aliexpress, chances getting counterfeight components are very high, 100% for some parts. You have TME in Poland after all.