Anyone recommend a US source of reasonably priced tants?

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lusoman
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Anyone recommend a US source of reasonably priced tants?

Post by lusoman » Sun Oct 18, 2020 7:56 pm

Looking for 35V and 50V tants. Mouser and DigiKey have them but they are priced at $4-5 each for 10u and above. AllElectronics don't seem to have anything above 25V.
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col
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Re: Anyone recommend a US source of reasonably priced tants?

Post by col » Sun Oct 18, 2020 9:09 pm

Don't use them, they fail short-circuit!

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B0bcat
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Re: Anyone recommend a US source of reasonably priced tants?

Post by B0bcat » Sun Oct 18, 2020 9:29 pm

Several Haible Designs use them. What’s the supposed benefit over “regular” electro caps?
WTB:
Malekko/Wiard Oscillator / Anti / Borg (Gargoyles),
Plan B Model 12 / 13 / 15,
Macro Machines Storage Strip,
Intellijel FlipFlop

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Re: Anyone recommend a US source of reasonably priced tants?

Post by Flounderguts » Sun Oct 18, 2020 11:00 pm

I read that first as "reasonably priced taints," did a doubletake and got "reasonably priced pants."

Then I cleaned my glasses.
----------------------

Flounderguts

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Mungo
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Re: Anyone recommend a US source of reasonably priced tants?

Post by Mungo » Mon Oct 19, 2020 12:03 am

B0bcat wrote:
Sun Oct 18, 2020 9:29 pm
Several Haible Designs use them. What’s the supposed benefit over “regular” electro caps?
Historically they were smaller in size for the same ratings. But there have been improvements in low ESR electrolytics, and closely related aluminium "polymer" caps are newer replacements for tantalum.

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lusoman
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Re: Anyone recommend a US source of reasonably priced tants?

Post by lusoman » Mon Oct 19, 2020 9:03 am

If I do go with electros, then, is there any advantage/disadvantage in using non-polarized ones? For a start, I kinda like the luminous green they often come in?
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Re: Anyone recommend a US source of reasonably priced tants?

Post by mskala » Mon Oct 19, 2020 9:20 am

Non-polarized capacitors are usually bigger and more expensive, but you need them if you will be applying reverse voltage. There is no particular electrical advantage to polarized capacitors - a circuit meant to use them will work with non-polarized too - but the polarized capacitors are often cheaper and smaller.

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MikeDB
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Re: Anyone recommend a US source of reasonably priced tants?

Post by MikeDB » Mon Oct 19, 2020 9:22 am

Provided your circuit can take it the much lower ESRs, consider 50V MLCC capacitors as an often cheaper and non-polarised alternative to tants.

But don't put them on the output of a prehistoric voltage regulator like the 78xx series as they don't mix well.
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Re: Anyone recommend a US source of reasonably priced tants?

Post by MikeDB » Mon Oct 19, 2020 9:24 am

lusoman wrote:
Mon Oct 19, 2020 9:03 am
If I do go with electros, then, is there any advantage/disadvantage in using non-polarized ones? For a start, I kinda like the luminous green they often come in?
Most electrolytics dry out over time and need replacing after a few decades, but non-polarised do seem to need replacing a little earlier. Not sure why.
Personally I hate cats ! Charlie the jackdaw on my shoulder also hates cats as his mother was killed by one so I had to raise him until he set off to procreate his lineage.

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Re: Anyone recommend a US source of reasonably priced tants?

Post by B0bcat » Mon Oct 19, 2020 1:35 pm

Mungo wrote:
Mon Oct 19, 2020 12:03 am
B0bcat wrote:
Sun Oct 18, 2020 9:29 pm
Several Haible Designs use them. What’s the supposed benefit over “regular” electro caps?
Historically they were smaller in size for the same ratings. But there have been improvements in low ESR electrolytics, and closely related aluminium "polymer" caps are newer replacements for tantalum.
such as these, 647-PLV1J220MCL1TD (Mouser)?
WTB:
Malekko/Wiard Oscillator / Anti / Borg (Gargoyles),
Plan B Model 12 / 13 / 15,
Macro Machines Storage Strip,
Intellijel FlipFlop

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Mungo
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Re: Anyone recommend a US source of reasonably priced tants?

Post by Mungo » Mon Oct 19, 2020 4:15 pm

B0bcat wrote:
Mon Oct 19, 2020 1:35 pm
Mungo wrote:
Mon Oct 19, 2020 12:03 am
B0bcat wrote:
Sun Oct 18, 2020 9:29 pm
Several Haible Designs use them. What’s the supposed benefit over “regular” electro caps?
Historically they were smaller in size for the same ratings. But there have been improvements in low ESR electrolytics, and closely related aluminium "polymer" caps are newer replacements for tantalum.
such as these, 647-PLV1J220MCL1TD (Mouser)?
Yes, that would be an example part.

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Re: Anyone recommend a US source of reasonably priced tants?

Post by Dave Peck » Mon Oct 19, 2020 4:23 pm

lusoman wrote:
Sun Oct 18, 2020 7:56 pm
Looking for 35V and 50V tants. Mouser and DigiKey have them but they are priced at $4-5 each for 10u and above. AllElectronics don't seem to have anything above 25V.
I nearly always get the best results by using Octopart.com. If you just want to find stock at the best price it helps if you have already narrowed your search down to a few readily available mfgr's part numbers, but you can also do a wider search based on description.

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