Re: E.S. of plastic xstr case

2003-03-05 Thread Jim Ericson

Dear John:

Well, maybe not the ten millionth, but at least the umpteenth!

We are an A2LA Accredited Lab in Washington State ( in the quiet country
midway between Seattle and Vancouver, British Columbia).  Wyle indeed works
here, and is quite proficient at EMI mitigation.  During coffee breaks I can
see him from my office window -- running and frolicking with Eagles, Cattle,
and yes, occasionally other Coyotes.

Cheers,

Jim Ericson

>
> I read in !emc-pstc that Jim Ericson  wrote (in
> <003c01c2e1fb$239b0cc0$b4663fce@pavilion>) about 'E.S. of plastic xstr
> case' on Mon, 3 Mar 2003:
> >Jim Ericson
> >Acme Testing Company
> >Acme, Washington
> >j...@acmetesting.com
>
> Do you employ Wyle E Coyote or is he an independent test-house? (;-)
>
> Am I the ten millionth person who asked?
> --
> Regards, John Woodgate, OOO - Own Opinions Only.
http://www.jmwa.demon.co.uk



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Re: E.S. of plastic xstr case

2003-03-04 Thread John Woodgate

I read in !emc-pstc that Jim Ericson  wrote (in
<003c01c2e1fb$239b0cc0$b4663fce@pavilion>) about 'E.S. of plastic xstr
case' on Mon, 3 Mar 2003:
>Jim Ericson
>Acme Testing Company
>Acme, Washington
>j...@acmetesting.com

Do you employ Wyle E Coyote or is he an independent test-house? (;-)

Am I the ten millionth person who asked?
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
Interested in professional sound reinforcement and distribution? Then go to 
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!


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Re: E.S. of plastic xstr case

2003-03-04 Thread Jim Ericson
Brian:
 
Transistor and Integrated Circuit "plastic" encapsulants usually are some
recipe of Epoxy Novolac.  I'd suggest doing a Google search for [Epoxy Novolac
+electrical characteristics].
 
Or, do an end run on a manufacturer.  You might try calling Philips
Semiconductor on Arques Avenue in Sunnyvale, California.  Ask for Bill Hobdy. 
He's an epoxy expert there.  I worked with him for many years, so use my name
if it helps get through the maze.
 
Good luck!
 
Jim Ericson
Acme Testing Company
Acme, Washington
j...@acmetesting.com
 

- Original Message - 
From: boconn...@t-yuden.com 
To: emc-p...@majordomo.ieee.org 
Sent: Monday, March 03, 2003 11:40 AM
Subject: E.S. of plastic xstr case


Good People of PSTC: 

I have noted that there is a CCA decision stating that the "plastic enclosure
of a semiconductor cab be considered as basic insulation..."

But I cannot find manufacturers' specs listing the dielectric strength of the
plastic case (e.g., TO-0220). Am I overlooking an obvious data source? They
must design this in, because all of the FETs that I have tested do ok up to
approx 2500Vdc.

thanks much. 

R/S, 
Brian 




Re: E.S. of plastic xstr case

2003-03-03 Thread John Woodgate

I read in !emc-pstc that boconn...@t-yuden.com wrote (in ) about 'E.S. of plastic xstr
case' on Mon, 3 Mar 2003:

>I have noted that there is a CCA decision stating that the "plastic
>enclosure of a semiconductor cab be considered as basic insulation..."
>
>But I cannot find manufacturers' specs listing the dielectric strength of
>the plastic case (e.g., TO-0220). Am I overlooking an obvious data source?
>They must design this in, because all of the FETs that I have tested do ok
>up to approx 2500Vdc.

Have you looked in the 'generic' pages in the data books? Those that are
full of fine print about precise mechanical dimensions, soldering,
reliability, meanings of figures in data sheets (if any) etc., etc. 
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
Interested in professional sound reinforcement and distribution? Then go to 
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!


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