Long life electrolytic capacitors - Page 2

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From English to

Threaded View
Re: Long life electrolytic capacitors
On Wednesday, September 5, 2018 at 5:45:47 AM UTC+10, John Larkin wrote:
Quoted text here. Click to load it

Or the only way John knows how to explore it.

The fact that inventions tend to be independently invented at much the same time   does suggest that the solution space does have a structure that some can perceive.

--  
Bill Sloman, Sydney

Re: Long life electrolytic capacitors
Quoted text here. Click to load it

I am stunned, philosophy from you.
Deeply impressed...


Re: Long life electrolytic capacitors
On Wednesday, September 5, 2018 at 3:11:39 PM UTC+10, snipped-for-privacy@nospam.org wrote:
Quoted text here. Click to load it

Don't be. You get that kind of superficial profundity  in fortune cookies.

--  
Bill Sloman, Sydney

Re: Long life electrolytic capacitors
wrote:

Quoted text here. Click to load it

We buy parts and solder them to boards. That's not very philosophical.

There are just a lot of ways to do that.


--  

John Larkin   Highland Technology, Inc   trk

jlarkin att highlandtechnology dott com
We've slightly trimmed the long signature. Click to see the full one.
Re: Long life electrolytic capacitors
On Thursday, September 6, 2018 at 12:59:41 AM UTC+10, John Larkin wrote:
Quoted text here. Click to load it

But not quite as many a John Larkin imagines, and rather more than John Larkin is prepared to consider - "try not to use any part that you can't buy from Newark" is a pretty sensible starting point, but you can't afford to make it a rigid rule.

--  
Bill Sloman, Sydney


Re: Long life electrolytic capacitors

Quoted text here. Click to load it

That's like $1.70/year, much cheaper than a service contract!

Tim

--  
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Design
We've slightly trimmed the long signature. Click to see the full one.
Re: Long life electrolytic capacitors
On 02/09/2018 15:14, Piotr Wyderski wrote:
Quoted text here. Click to load it

Quoted text here. Click to load it

50years at 45deg is not that impressive. Derating is lifex10 per 20deg  
drop for solid polymer or roughly lifex4 per 20deg drop for wet  
electrolytic. So that 438khr implies 6800 hours at 105degC (if wet  
electrolytic) or 430 hours at 105degC if polymer. Plenty of parts around  
now boast 10,000 hrs at 105degC and polymers nearly as good at that temp  
(and of course vastly better at lower temps).

piglet


Re: Long life electrolytic capacitors
Piglet wrote:

Quoted text here. Click to load it

Sure, but it's the first time I see "50 years" specified explicitly.
Currently the best "long life" part I have ever seen didn't specify
that expressis verbis, but its longevity chart ended around 18 years.

Quoted text here. Click to load it

But there are no high voltage polymers (400+V DC).
125V is the current record AFAIR.

    Best regards, Piotr

Re: Long life electrolytic capacitors
On 03/09/2018 07:10, Piotr Wyderski wrote:

Quoted text here. Click to load it

LOL, marketing missed a trick, should have said 200 years life at 25deg!

piglet



Re: Long life electrolytic capacitors
Piglet wrote:

Quoted text here. Click to load it

Close:

http://www.cde.com/news/1999/12/mlp-capacitor-is-a-nasa-spin-off

"Life tests and measurements of weight loss at high temperatures showed  
expected operating lifetimes for the spinoff capacitor of 50 to 100  
years. That is well beyond the 10 years expected of typical aluminum  
electrolytic capacitors."

:-)

    Best regards, Piotr


Site Timeline