Re: [TCML] RE: 942C current?

[Carl Noggle <cn@xxxxx>]

Hey---

The 942C cap has a pulse current rating of 628 amps max, with a rms 
rating of 10.7 amps.  This is way beyond the currents in the usual 
SSTC.  If this is actually a problem in your design, you're a better man 
than I am, Gunga Din, and more power to you.  These caps are amazingly 
cheap, so you can series-parallel many of them.  You will have many 
years of trouble-free service.

The data sheet is at     http://www.cde.com/catalogs/PULSE-942C.pdf.

I built a system similar to a TC operating at about 1 MHz with these 
caps and never had a problem.  On the basis of this, I would recommend 
using a half-bridge or full-bridge driver to protect your FETs.  It's 
worth the hassle of using a high-side driver.

Good luck---

Carl



> On 2/28/11 10:10 PM, Etienne Dreyer wrote:
> > Hi everyone,
> > I was going to order the 942C series cornell dubilier caps (2kV, 
> > 0.15uF http://www.cde.com/catalogs/942C.pdf ), but am now worried 
> > that their current (amps) ratings are too low for my MOT driven coil. 
> > Should I order the more expensive 941C caps (1.2kV, 0.22uF 
> > http://www.cde.com/catalogs/941C.pdf) although their dV/dT ratings 
> > aren't as good? Does someone know which are better for the high 
> > current output of MOTs?
> > Many thanks,
> > Etienne                           
> > _______________________________________________
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> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
>
>
> 942 are better than 941 for TC applications.
>
> Check back in the archives for the test data and analysis by Terry Fritz.
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