Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.




Any help appreciated.,


thanks,


Gareth.

"Gareth Magennis" wrote in
:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is
marked KC103P, the other KC221K, the first a blue disk looking just like
this: http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller
than the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell
you 1000 at a time, but I can't find any data to tell me what they are
or an equivalent.


http://www.galco.com/scripts/cgiip.e...t=cat&line=PAS
SIVE&cat=MOV&mfg=&source=ADWORDS&gclid=CPyUkqrYxpM CFQKaFQodjRz0Cg

metal oxide varistor. MOV

http://www.galco.com/circuit/TechTips-MOV.htm

Acts like a short circuit to voltage spikes.





--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

remove ch100-5 to avoid spam trap

"bz" wrote in message
98.139...
"Gareth Magennis" wrote in
:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is
marked KC103P, the other KC221K, the first a blue disk looking just like
this: http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller
than the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell
you 1000 at a time, but I can't find any data to tell me what they are
or an equivalent.


http://www.galco.com/scripts/cgiip.e...t=cat&line=PAS
SIVE&cat=MOV&mfg=&source=ADWORDS&gclid=CPyUkqrYxpM CFQKaFQodjRz0Cg

metal oxide varistor. MOV

http://www.galco.com/circuit/TechTips-MOV.htm

Acts like a short circuit to voltage spikes.




Makes sense now of course. Thanks.



Gareth.

On Tue, 27 May 2008 11:12:51 +0100, "Gareth Magennis"
put finger to keyboard and composed:

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.

This site ...

http://www.sourceesb.com/PartNumber....e=W&search=KC1

.... suggests that the KC103P is manufactured by Murata Electronics
North America.

This site ...

http://www.usbid.com

.... lists the KC103M as a capacitor made by "S/M".

I suspect the part may be a high voltage 10nF ceramic cap.

It would help to know to which other parts these devices connect.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.




Any help appreciated.,


thanks,


Gareth.

I think what your looking at is a MOV..

wrote:

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The PTC thermistors are from Keystone Carbon Corp., I used these some years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-C...Company/KC010L

But that might be new-old stock.

Jon

Jon Elson wrote:


The PTC thermistors are from Keystone Carbon Corp., I used these some years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-C...Company/KC010L


** That pic looks exactly like a regular NTC thermistor.

Mains voltage rated PTCs are used in the AC supply to PSUs, both transformer and switchmode to provide anti-surge PLUS overload protection.

Impressive to see one doing its job, running stinking hot while allowing only 25mA or so into the faulty PSU.


..... Phil

Phil Allison wrote:

Jon Elson wrote:


The PTC thermistors are from Keystone Carbon Corp., I used these some
years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-C...Company/KC010L


** That pic looks exactly like a regular NTC thermistor.
OOPs, that is indeed what I was thinking of, was NTC, not PTC, for inrush
surge limiting.

Jon

wrote:

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.

If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.

I think what your looking at is a MOV..


You replied to a 17 year old message.

On Tue, 21 Jul 2015, Michael A. Terrell wrote:


wrote:

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/mod...=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.

If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.

I think what your looking at is a MOV..


You replied to a 17 year old message.

I've seen replies to older messages, but in this case, it's only been 7
years. 17 would have the original post in 1998.

And in this case, I seem to have missed the original post, so yes, it's
amusing to see the other replies, which clearly came because of the first
post.

It's often interesting to look at the original thread, because these old
post resurrectors often don't. They think they have something to add, yet
the original thread often covers the whole thing.

Michael

Michael Black wrote:

On Tue, 21 Jul 2015, Michael A. Terrell wrote:

You replied to a 17 year old message.

I've seen replies to older messages, but in this case, it's only been 7
years. 17 would have the original post in 1998.


You're right. I had seen a 16 year old message replied to on another
group a few minutes earlier, and wasn't paying close attention.


And in this case, I seem to have missed the original post, so yes, it's
amusing to see the other replies, which clearly came because of the first
post.

It's often interesting to look at the original thread, because these old
post resurrectors often don't. They think they have something to add, yet
the original thread often covers the whole thing.

Michael