I'm finding the capacitor

[snvl0228]

I'm finding the capacitor that have low capacitive and high RMS current, so where I can buy it?

Please recommend the site or company or something..

 

[FvM]

Capacitance, voltage, current, frequency?

 

[KlausST]

I'm finding the capacitor that have low capacitive and high RMS current, so where I can buy it?

Please recommend the site or company or something..

There are capacitor manufacturers, they provide all informations you need. They provide datasheets, online selection tools, formulas, ...

And there are electronics distributors. They usually have online shops with selection tools. They usually sell capacitors from several manufacturers.
They also show price and availability.

Indeed nothing special. The same as with all industrial/technical goods.

But as already mentioned: Capacitors are not sold by RMS current. They are mainly sold by capacitance, voltage and application.
--> you need to have these numbers by hand.

Klaus

 

[cupoftea]

Yes, as above but have a look at ceramic capacitors....or film capacitors.

 

[snvl0228]

Capacitance, voltage, current, frequency?

110nF ~ 220nF, over 600V, 30Arms, 100kHz
It'll use for CDD circuit.

I can use max 3 capacitor in parallel.

I searched capacitors in KEMET, EPCOS... but, I couldn't find desirable capacitors..

 

[ahsrabrifat]

What value do you need? I mean how many farads/pico farads or microfarads are you looking for?

 

[brucesilver]

I'm finding the capacitor that have low capacitive and high RMS current, so where I can buy it?

Please recommend the site or company or something..

You can check out Mouser, Digi-Key, or RS Components. They have a wide range of capacitors with detailed specs. If you need something specific, KEMET and Vishay also make low-capacitance, high-RMS current caps.

 

[snvl0228]

What value do you need? I mean how many farads/pico farads or microfarads are you looking for?

I need total capacitance 110nF~220nF. I can use parallel capacitors if the current capacity lacks.

For example, In terms of capacitance, I can use three 68nF capacitors in parallel. However, I couldn't find a capacitor that satisfied the current capacity in KEMET.

 

[snvl0228]

You can check out Mouser, Digi-Key, or RS Components. They have a wide range of capacitors with detailed specs. If you need something specific, KEMET and Vishay also make low-capacitance, high-RMS current caps.

I couldn't a capacitor in Mouser, digikey. I'll find in RS component. Thanks

 

[KlausST]

110nF ~ 220nF, over 600V, 30Arms, 100kHz

What´s this 600V?
--> V_RMS, V_p, V_pp, something else?

Waveform:
--> sine?

Klaus

 

[snvl0228]

What´s this 600V?
--> V_RMS, V_p, V_pp, something else?

Waveform:
--> sine?

Klaus

600Vdc, but, I think 2kV because of the current capacity.

CDD circuit is clamping circuit. So, It is similar to sine wave.

 

[KlausST]

Hi,

600Vdc, but, I think 2kV because of the current capacity.

This makes no sense.

600V DC... DC means no frequency, but before you talked about 100 kHz.

What is now this "2kV" statement? What has it to do with current capacity?

--> draw a sketch how you expect the voltage at the capacitor to look like


Klaus

 

[D.A.(Tony)Stewart]

I used grok to help locate the best supplier of components in your category. The first source was General Atomics in the component division for electromagnetics. They offer solutions up to 1 MA in the C, V and f range of your requirements.

If you list all your specifications which include environment, size and budget they may be able to provide your requirements.

"I can use max 3 capacitor in parallel."
I am concerned about your limitation of 3 parallel components. The size must increase with the ampacity of the conductors and normally the closest to ideal dielectrics are high-purity plastics such as PU or PE .

I hope your budget is realistic for your non-standard requirement because the obvious low-budget solution is to parallel high-volume production parts.

Good luck.

https://www.ga.com/images/products/ep/capacitors/pdf/2408_CAPACITORS_E.pdf

 

[snvl0228]

Hi,


This makes no sense.

600V DC... DC means no frequency, but before you talked about 100 kHz.

What is now this "2kV" statement? What has it to do with current capacity?

--> draw a sketch how you expect the voltage at the capacitor to look like


Klaus

Oh.. I'm so sorry.... My explanation was so lacking..

The capacitor's waveform will like that.

I found many types of capacitors and thought rated voltage is not something to consider. Because I want high rated RMS current. It makes capacitor's volume and rated voltage big and high.

 

[snvl0228]

I used grok to help locate the best supplier of components in your category. The first source was General Atomics in the component division for electromagnetics. They offer solutions up to 1 MA in the C, V and f range of your requirements.

I really thanks about your advice. I will look up a capacitor in the pdf and general atomics.

 

[Easy peasy]

Dawn cap has all the caps you need.

 

[snvl0228]

I really appreciate your adivce. But, I can't use chinese products..