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June 2010

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Subject:
From:
"Woolley, Mark D. (Mark)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Woolley, Mark D. (Mark)
Date:
Fri, 4 Jun 2010 09:44:31 -0600
Content-Type:
text/plain
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text/plain (217 lines)
PTC = Positive Temperature Coefficient (Resistor).  It is used to limit
current in a circuit.  The resistance increases non-linearly and
dramatically when the component is heated, either through self heating
(I2R heating) or externally by a heat source.

mark

Mark Woolley |PTRL Laboratory | Avaya | 1300 West 120th Ave |
Westminster, CO 80234  USA |

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Friday, June 04, 2010 8:23 AM
To: [log in to unmask]
Subject: Re: [TN] Cap Marking and value?

Is this a Friday question, Fake cap!   What does x-ray imaging show?
What is PTC Limiter?

Victor,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Friday, June 04, 2010 8:54 AM
To: [log in to unmask]
Subject: Re: [TN] Cap Marking and value?

Faked cap? 
--------------------------
Sent using BlackBerry


----- Original Message -----
From: Guy Ramsey [mailto:[log in to unmask]]
Sent: Friday, June 04, 2010 09:16 AM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: [TN] Cap Marking and value?

Thank you, 
I think you are right. It measures like a jumper. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Technet Legg
Sent: Friday, June 04, 2010 8:20 AM
To: [log in to unmask]
Subject: Re: [TN] Cap Marking and value?

Silly, but are you sure it's a cap?

If it measures short, it's likely a discontinued PTC limiter.
The AVX current line is limited to SMD varieties. You'd have to cross 
to Littelfuse for physical substitutions.

Rob Legg


On Tue, 25 May 2010 17:03:49 -0400, Steve Gregory
<[log in to unmask]>
wrote:

>Anybody know what the marking on this cap means?
>
>
>
>http://stevezeva.homestead.com/cap_Value.jpg
>
>
>
>I could guess myself, but I was wondering if anybody knows for sure
what
the
>cap is?
>
>
>
>Steve
>
>
>
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