Jellybean electrolytic capacitors

[Winfield]

What do you think is a good general-purpose low-cost
versatile jellybean aluminum electrolytic capacitor line?
I'm looking for a manufacturer and specific product line.
When I say versatile, I mean available in a wide range of
part values and operating voltages, and physical sizes.

 

[John Larkin]

What do you think is a good general-purpose low-cost
versatile jellybean aluminum electrolytic capacitor line?
I'm looking for a manufacturer and specific product line.
When I say versatile, I mean available in a wide range of
part values and operating voltages, and physical sizes.

Why not just buy whatever's in Mouser or Digikey? They all seem pretty
much the same, if you don't need exotica like special ESR or
something.

John

 

[John Devereux]

Why not just buy whatever's in Mouser or Digikey? They all seem pretty
much the same, if you don't need exotica like special ESR or
something.

Because its for a table in the new edition?

 

[Winfield Hill]

Because its for a table in the new edition?

Close - it's for a scatterplot of esr vs size for
our new Chapter 1X capacitor-properties discussion.
I've measured a mass of parts from our stock drawers
plus some we've ordered for the purpose, and it's
quite interesting to see what an extreme variation
of performance can be seen.

I'd like to order a wide selection from one or two
lines and be able to specifically mark them on the
plot - obviously it'd be most useful if they're
good parts to choose. For example, I used to get
lots of Panasonic HFS series parts - reasonably-low
esr, not too expensive, with a wide range of values
and voltages available, but, it's been discontinued.
I haven't yet chosen a replacement for our stocks.

 

[Eeyore]

What do you think is a good general-purpose low-cost
versatile jellybean aluminum electrolytic capacitor line?
I'm looking for a manufacturer and specific product line.
When I say versatile, I mean available in a wide range of
part values and operating voltages, and physical sizes.

I have found Samwha's product to be very reliable in high volume production.

The other brand I tend to use is Panasonic.

Graham

 

[Eeyore]

Close - it's for a scatterplot of esr vs size for
our new Chapter 1X capacitor-properties discussion.
I've measured a mass of parts from our stock drawers
plus some we've ordered for the purpose, and it's
quite interesting to see what an extreme variation
of performance can be seen.

I've just been speccing such a part myself.

It's 1000uF/25V and the 2 best candidates I found on Farnell's site had ESRs of
38 mohm (Panasonic) and 21 mohm (Nichicon). I forget the product series. Here
you go.

http://uk.farnell.com/jsp/search/productdetail.jsp?sku=9692193
http://uk.farnell.com/jsp/search/productdetail.jsp?sku=8822905

There were worse of course.

Graham

 

[John Larkin]

Close - it's for a scatterplot of esr vs size for
our new Chapter 1X capacitor-properties discussion.
I've measured a mass of parts from our stock drawers
plus some we've ordered for the purpose, and it's
quite interesting to see what an extreme variation
of performance can be seen.

Oh. How about NEC or Nichicon? They probably make their own stuff.

I'd like to order a wide selection from one or two
lines and be able to specifically mark them on the
plot - obviously it'd be most useful if they're
good parts to choose. For example, I used to get
lots of Panasonic HFS series parts - reasonably-low
esr, not too expensive, with a wide range of values
and voltages available, but, it's been discontinued.
I haven't yet chosen a replacement for our stocks.

I have a scatterplot of power transformer weight vs power, if
anybody's interested.

John

 

[Winfield Hill]

Oh. How about NEC or Nichicon? They probably make their own stuff.




I have a scatterplot of power transformer weight vs power,
if anybody's interested.

Yes, I'm interested!

 

[Joerg]

Close - it's for a scatterplot of esr vs size for
our new Chapter 1X capacitor-properties discussion.

Hey, can you guys include a small picture of a tantalum turning into a
rocket? With that orange-greenish streak spewing out the bottom and
maybe an impressive cloud?

 

[Winfield Hill]

I have found Samwha's product to be very reliable in high
volume production.

I wonder if esr and other such parameters mean much
in your high-volume application? I had a few Samwha
caps in my drawers, and was surprised at how poorly
they did. But then they may have been quite old.

That's one of the reasons I'm buying new parts for
the rest of the graph measurements (the old ones
will be left in for comparison).

The other brand I tend to use is Panasonic.

DigiKey has long been a serious Panasonic stocker,
and I've gotten used to their caps, at least a few
of the types, such as the HFS I mentioned earlier.
They tested very well, BTW. Now I'm looking at
Nichicon, which was suggested to me elsewhere.
For example their PW series look appealing.

 

[Joerg]

Yes, I'm interested!

But please, please teach the readers _not_ to design the transformer so
it'll work nicely at 120V, saturate at 130V and then go up in smoke at
132V. I've been through several reviews where in the end it was "oh, but
at this point that's all the space we've got".

 

[qrk]

What do you think is a good general-purpose low-cost
versatile jellybean aluminum electrolytic capacitor line?
I'm looking for a manufacturer and specific product line.
When I say versatile, I mean available in a wide range of
part values and operating voltages, and physical sizes.

Another interesting difference is the esr beteween axial and radial
leaded Al electrolytics.

 

[Eeyore]

I wonder if esr and other such parameters mean much
in your high-volume application? I had a few Samwha
caps in my drawers, and was surprised at how poorly
they did. But then they may have been quite old.

I wasn't using the Samwhas in a low ESR application, just their plain vanilla
parts.

Graham

 

[Winfield Hill]

Hey, can you guys include a small picture of a tantalum
turning into a rocket? With that orange-greenish streak
spewing out the bottom and maybe an impressive cloud?

Can you provide us with a nice photo?

 

[Winfield Hill]

Another interesting difference is the esr beteween axial
and radial leaded Al electrolytics.

Really? I've just been measuring the radial-lead
parts from my drawers, and was planning on ordering
only that style, is that a mistake?

 

[Fred Bartoli]

Winfield Hill a écrit :

Really? I've just been measuring the radial-lead
parts from my drawers, and was planning on ordering
only that style, is that a mistake?

I don't think so. But I think you should not miss oscons which are
excellent in many aspects.

 

[John Larkin]

But please, please teach the readers _not_ to design the transformer so
it'll work nicely at 120V, saturate at 130V and then go up in smoke at
132V. I've been through several reviews where in the end it was "oh, but
at this point that's all the space we've got".

Buy better lams.

We had one transformer, not too big, 10 pounds maybe, that ran warm
and, if you teased the power switch, would make the wiring in the
walls thump audibly at turnon. We measured close to 1000 amps peak
current. It would also fry varnish at 130 volts.

Here's the transformer plot for Win...

http://img66.imageshack.us/my.php?image=xfmrscatterbq5.jpg

This graph was really hard to shoot... terrible Moire' effects.

John

 

[John Larkin]

Hey, can you guys include a small picture of a tantalum turning into a
rocket? With that orange-greenish streak spewing out the bottom and
maybe an impressive cloud?

http://img144.imageshack.us/my.php?image=bangvf0.jpg



John

 

[Winfield Hill]

Winfield Hill a écrit :


I don't think so.

Hmm. Anybody else?

But I think you should not miss oscons
which are excellent in many aspects.

Yes indeed!

I've bought quite a few organic electrolyte parts for
test, plus three values of OS-CONs we got as samples
from their distributor, Capacitors Plus. But I wonder
how hard they normally are to get in small quantities,
since they aren't available from regular distributors?

 

[John Larkin]

Hmm. Anybody else?


Yes indeed!

I've bought quite a few organic electrolyte parts for
test, plus three values of OS-CONs we got as samples
from their distributor, Capacitors Plus. But I wonder
how hard they normally are to get in small quantities,
since they aren't available from regular distributors?

Digikey has the United Chemi-Con polymers. Nice, very low esr, hold up
below 0 degrees C. But only up to 16 volts.

John