Is it ok to use higher voltage caps if the uF rating is the same?

Generally speaking, yes, not a problem. For more specialised applications (like say a low ESR capacitor in a SMPS) you have to be more careful when substituting caps.

Dave :)

: >

: > Is it ok to use caps that are a higher voltage than the circuit states : > providing that they are the same uF rating? : : Generally speaking, yes, not a problem.\\

: For more specialised applications (like say a low ESR capacitor in a : SMPS) you have to be more careful when substituting caps.

the answer is yes and even a higher uF rating is ok in a lot of apps

"David" <

** In some cases definitely *** NO*** .

What is your application ?

........... Phil

I'm intending to use the caps in a TV circuit. In the vertical section.

Yes, its common for TV to have values that are boarder line and can be substituted

On Fri, 02 Dec 2005 21:18:55 GMT, "David" put finger to keyboard and composed:

Go right ahead.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

ESR is generally a function of case size....

"usually" is a better answer

sometimes caps are chosen for their high ESR. bung a big fat X7R cap on the output of an LP3961 LDO regulator, and you'll see what I mean.

If the equipment doesnt have to run at very low temperatures, I often use high-ESR electrolytics to damp LC filters....

Cheers Terry

"Terry Given"

** Huh ??

All the low ESR electos I see advertised are in the same or even smaller case sizes than their regular counterparts.

Low ESR in a electro is a predominantly function of the electrolyte used - ie must have very high conductivity.

........ Phil

Sorry Phil, I should have added "for a given electrolyte".

If I use a Nichicon PS series cap as an example, see:

then you'll see that all the 5x11 case size caps from 22uF 6.3V to 33uF

35V have the same ESR.

actually, when the cap voltage gets over 35V the ESR goes up for a given case size, but the relation holds tru for a 5:1 range of cap voltage. not bad for a ROT.

So for a given chemistry, if you want less ESR you need a bigger cap.

Cheers Terry

** You should then also add that your comment was **hypothetical**.

You have a very bad habit, Terry of shifting context and moving the goalposts without TELLING ANY ONE !

** Sure - as if WES et alia offer 47 uF, 35 volt electos in a whole bunch of quite different case sizes.

Like Hell.

....... Phil

its not hypothetical at all. thats why I gave the datasheet link.

?!

smt & leaded....

never heard of WES. If you spend $1,000,000 with Hitachi AIC, they will make you any cap you like.

A United Chemi-Con LXZ series 6.3V 1200uF cap comes in 2 case sizes:

case ESR Ripple current

8x20 0.080 810mA 10x16 0.068 1050mA

QED

Cheers Terry

"Terry Given" = yet another Kiwi mental defective .......

** It was hypothetical to the particular issue YOU were commenting on - f****it . ** You are one, dangerous bloody IDIOT - Terry.

** Insanity - pure bloody insanity.

** Never heard of reality either.

** Insanity - pure bloody insanity.

Your pet sheep are missing you - Terry.

Baaaaaaaaaaaaaaaahhhhhhhhhhhhhhh.....

........... Phil

David

"quietguy" wrote in message news: snipped-for-privacy@REMOVE-TO-REPLYconfidential-counselling.com...

** What the HELL are you doing with your newsreader ??

The above quotes no poster by name, has no context, looks like it is itself a quote and moreover reads like a dumb troll.

Maybe "confidential counselling " is just what YOU need.

......... Phil

Well gee Phil, seems like you are getting your little knickers in a knot again

- but I guess you just forgot to read the heading of the post I replied to - if you read that really really carefully my post makes lots of sense, well at least to those with common sense and good manners.

Do try to be nice Phil - it doesn't hurt and you wouldn't make such an idiot of yourself

David - who really doesn't care what Phil writes but enjoys pok> "quietguy" wrote in

"quietguy" = top posting , non quoting wanker

** It is not possible to know what post you replied to as you did not QUOTE any of it !!

Flys in the face of basic usenet etiquette.

** Never said it was nonsense - I said it was a TROLL.

When you post UNDER people's actual words such misconstructions are avoided.

** Leaves YOU out - doesn't it ? ** When you post UNDER people's words and about the thoughts expressed therein such misconstructions are avoided. ** Err - David - who really does not care about anything much at all.

BTW

Screwed any of you tenants lately ??

........... Phil

Just the female ones Phil - I can save their pets for you if you ask me nicely

David - who w> BTW

...and you are so bigoted that you wouldn't have a relationship with an aboriginal lady Dill? (whoops I meant to write Phil)

David - who likes (most) aborig>

"quietguy"

** QED.

( That was simple and efficient ...... )

......... Phil