> Doesn't one also have to consider the reactance
>of the cap at a specific frequency and the result
>change in possible breakdown E of the cap?
> A cap with 50 ohms of reactance and 10 amps
>flowing through it at 1 Mhz is going to have 500
>volts across it yet the same cap at the same
>current level is only going to have 50 volts acrossed
>it at 10 Mhz. If the cap is rated at 500 volts it may
>fail at 1 Mhz, but work fine at 10 Mhz, all other things
>being reasonably equal of course.
>
>
> Does that sound reasonable?
>
Yes, V consideration is why the allowable current flow decreases at low
freqs. Cheers, Mark.
>
>
>On Fri, 24 May 2002 16:11:44 -0500 "Phil Clements" <philk5pc@tyler.net>
>writes:
>> I have a mica cap. here on my desk that I use for a paper-weight.
>> It is made by Captron.....5100 pf @ 3000 peak volts.
>> The current ratings marked on it are:
>> 9.1 amps @ 3000 khz
>> 8.2 amps @ 1000 khz
>> 6.2 amps @ 300 khz
>> 3 amps @ 100 khz
>>
>> This brings up a number of questions:
>>
>> Is the 9.1 amps a maximum at ANY frequency above 3000 khz,
>> or does it rise past 9.1 amps at higher frequencies?
>>
>> If it will handle more current than 9.1 amps at higher frequencies,
>> will some point be reached where a maximum never-exceed
>> current rating will be reached?
>>
>> If 9.1 amps @ 3000 khz IS the never-exceed current rating,
>> does this hold at higher frequencies, or does the current
>> rating start to go back down as you pass 3000 khz going up?
>>
>> This ought to keep a few minds busy during the long week-end!
>>
>> Inquiring minds want to know.......
>>
>> (((73)))
>> Phil, K5PC
>>
>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
>
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- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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