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Science Forum Index » Electronics - Components Forum » Capacitor value please
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| Chris S |
 Posted: Wed Apr 23, 2008 4:08 pm |
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Can anyone ID the value of a capacitor with the following markings.
It looks like a ceramic.
GAP KAP
1-2KV
ARC
Thank you. |
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| Ross Herbert |
| Posted: Wed Apr 23, 2008 10:21 pm |
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On Wed, 23 Apr 2008 22:08:01 +0100, Chris S <default@default.invalid> wrote:
:Can anyone ID the value of a capacitor with the following markings.
:It looks like a ceramic.
:
: GAP KAP
: 1-2KV
: ARC
:
:Thank you.
Did you look at the datasheet?
http://www.vishay.com/docs/28521/gapkap.pdf
Since yours is marked 1 - 2Kv ARC it seems that it is 0.75pF. |
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| Eeyore |
| Posted: Thu Apr 24, 2008 1:11 am |
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Chris S wrote:
Quote: Can anyone ID the value of a capacitor with the following markings.
It looks like a ceramic.
GAP KAP
1-2KV
ARC
http://www.vishay.com/capacitors/list/product-28521/
http://www.vishay.com/docs/28521/gapkap.pdf
It's a specialised part.
" BCcomponents Gap-Kap capacitors provide a safe reliable
discharge path for stray transient overvoltages and static
voltage build-up. Combination of capacitor-spark-gap
construction allows the circuit designer to specify lower
voltage components and consequently lower cost, with
assurance that overvoltage conditions will be prevented. "
Graham |
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| Chris S |
| Posted: Thu Apr 24, 2008 5:53 pm |
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On Thu 24 Apr 2008 07:11:55, Eeyore
<rabbitsfriendsandrelations@hotmail.com> wrote:
So it's specialised. I guess that will teach me not to strip
components out of other equipment!
Quote: " BCcomponents Gap-Kap capacitors provide a safe reliable
discharge path for stray transient overvoltages and static
voltage build-up. Combination of capacitor-spark-gap
construction allows the circuit designer to specify lower
voltage components and consequently lower cost, with
assurance that overvoltage conditions will be prevented. "
Graham
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| Chris S |
| Posted: Thu Apr 24, 2008 5:54 pm |
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On Thu 24 Apr 2008 04:21:09, Ross Herbert <rherber1@bigpond.net.au>
wrote:
Quote: On Wed, 23 Apr 2008 22:08:01 +0100, Chris S
default@default.invalid> wrote:
:Can anyone ID the value of a capacitor with the following
:markings. It looks like a ceramic.
:
: GAP KAP
: 1-2KV
: ARC
:
:Thank you.
Did you look at the datasheet?
http://www.vishay.com/docs/28521/gapkap.pdf
Since yours is marked 1 - 2Kv ARC it seems that it is 0.75pF.
Thanks Ross. |
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| Michael Black |
| Posted: Thu Apr 24, 2008 8:44 pm |
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On Thu, 24 Apr 2008, Chris S wrote:
what's around it.
We've seen it before, people ask about esoteric parts, parts they
have because they took it out of something. But if they'd left it
in until they needed it, the surrounding circuitry might help to
explain it. You can find some housenumber part and never find
data for it, yet on the circuit board, how it's connected is
well described since the parts it needs is right there. You can
either trace out the circuitry or just chop that area of the
circuit board off and use it as a module. I've seen people ask about
IF filters and the context of the circuit would give a general idea of
it's purpose (be it wide for FM broadcast, narrow and relatively low
frequency for AM broadcast, really wide for TV, and so on) and the
needed terminating values on the input and output would come from
the resistors attached to the filter on the circuit board. But
remove the filter, and that information is lost unless someone
traces it at the time and records it and keeps that information
with the actual part.
Michael |
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| legg |
| Posted: Fri Apr 25, 2008 10:44 am |
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On Thu, 24 Apr 2008 23:53:51 +0100, Chris S <default@default.invalid>
wrote:
Quote:
So it's specialised. I guess that will teach me not to strip
components out of other equipment!
Not neccessarily. If you have an application for an arc suppressor, in
the future, then you've got one, and the start of the basic knowledge,
now, to recognize the situation and to possibly use the one you've
got.
Mind you, these do have a limited application life ie number of arcing
events and must be kept scrupulously clean, to continue to function as
intended. Something to keep in mind.
RL |
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