Orange capacitor?

P

P.

Guest
Hi,

In a HP device I have 2 orange capacitors from which one is
short-circuited. The other one looks the same and is 680 nF. I know
that the voltage it will get is 28 volts.

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.

Any info is welcome.

Regards,
P.
 
"P." wrote:
Hi,

In a HP device I have 2 orange capacitors from which one is
short-circuited. The other one looks the same and is 680 nF. I know
that the voltage it will get is 28 volts.

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.

Any info is welcome.
Click to expand...

How about giving US some info, like what kind of 'device'? Does it
have a model number. Most HP test equipment manuals are available for
free on their Agilent website. If it is a cheap consumer computer
product, there is lille chance of identifying the part. Just because it
looks like another part is no guarantee it is the same.

The original 'orange' capacitors were epoxy dipped mylar by Sprague.
That, and a 2 in a small circle were their tradmarks.


--
http://improve-usenet.org/index.html

aioe.org, Goggle Groups, and Web TV users must request to be white
listed, or I will not see your messages.

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm


There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.
 
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in news:AL-
dnWZjW7pS3cvUnZ2dnUVZ_tjinZ2d@earthlink.com:

epoxy dipped mylar
Click to expand...
That's what I thought, but he said SMD at 1206 size. Did they make them that
small? The only orange (orangish) capacitors I know of that small in SMT are
ceramic types, like one shown here:
http://www.rjcomponents.com/stock/capacitors.asp
The value is in range for that type. A larger value in that range might also
tend to fail as a short. (Would have to be dramatic for it to fail open, it
probably wouldn't still be there..)
 
Lostgallifreyan wrote:
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in news:AL-
dnWZjW7pS3cvUnZ2dnUVZ_tjinZ2d@earthlink.com:

epoxy dipped mylar

That's what I thought, but he said SMD at 1206 size. Did they make them that
small?
Click to expand...

No. Vishay bought Sprague before they were big in SMD. The orange
color was used to make a positive ID, and the 2 in a circle logo was
from their RMA/EIA listing. Both were important trademarks in the US.
CDE used a deep brown, and Mallory used a pale blue so their products
could be identified on sight.


The only orange (orangish) capacitors I know of that small in SMT are
ceramic types, like one shown here:
http://www.rjcomponents.com/stock/capacitors.asp
Click to expand...

To my bad eyes, those look reddish brown.


The value is in range for that type. A larger value in that range might also
tend to fail as a short. (Would have to be dramatic for it to fail open, it
probably wouldn't still be there..)
Click to expand...
The part he says is shorted may be across something else that is
shorted, or an inductor. If it is on a 'ROHS' board, it may be tin
whiskers under the part. In the grade we used in our products, we
rarely saw a shorted ceramic SMD cap that wasn't physically damaged. I
found more shorted internal layers than shorted SMD ceramic caps.


--
http://improve-usenet.org/index.html

aioe.org, Goggle Groups, and Web TV users must request to be white
listed, or I will not see your messages.

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm


There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.
 
On Sat, 27 Dec 2008 09:50:54 -0500, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

"P." wrote:

Hi,

In a HP device I have 2 orange capacitors from which one is
short-circuited. The other one looks the same and is 680 nF. I know
that the voltage it will get is 28 volts.

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.

Any info is welcome.


How about giving US some info, like what kind of 'device'? Does it
have a model number. Most HP test equipment manuals are available for
free on their Agilent website. If it is a cheap consumer computer
product, there is lille chance of identifying the part. Just because it
looks like another part is no guarantee it is the same.

The original 'orange' capacitors were epoxy dipped mylar by Sprague.
That, and a 2 in a small circle were their tradmarks.
Click to expand...
Hi,

I already found it. It had a small pin on one side that could not be
seen as it was inside the soldering. So it is a tantalum with the pin
at the + side. I measured the other one better, it was 720 nF. Maybe
35 Volts? It is decoupling capacitor for the 28 (24) volts power
supply voltage of a HP HF attenuator. Decouples the small PCB of the
actual attenuator.

I will use a modern 1 uF /50V ceramic cap here, with DC Bias at 28
Volts it will probably still be 720 uF.

P.
 
On Sat, 27 Dec 2008 17:39:36 +0100, P.
<dit3_werkt_ook_niet@hotmail.com> wrote:

On Sat, 27 Dec 2008 09:50:54 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:


"P." wrote:

Hi,

In a HP device I have 2 orange capacitors from which one is
short-circuited. The other one looks the same and is 680 nF. I know
that the voltage it will get is 28 volts.

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.

Any info is welcome.


How about giving US some info, like what kind of 'device'? Does it
have a model number. Most HP test equipment manuals are available for
free on their Agilent website. If it is a cheap consumer computer
product, there is lille chance of identifying the part. Just because it
looks like another part is no guarantee it is the same.

The original 'orange' capacitors were epoxy dipped mylar by Sprague.
That, and a 2 in a small circle were their tradmarks.

Hi,

I already found it. It had a small pin on one side that could not be
seen as it was inside the soldering. So it is a tantalum with the pin
at the + side. I measured the other one better, it was 720 nF. Maybe
35 Volts? It is decoupling capacitor for the 28 (24) volts power
supply voltage of a HP HF attenuator. Decouples the small PCB of the
actual attenuator.

I will use a modern 1 uF /50V ceramic cap here, with DC Bias at 28
Volts it will probably still be 720 uF.

P.
Click to expand...
that should be 720 nF

P.
 
P. a écrit :

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.
Click to expand...
If one pad is longer than the other (a wire is coming out horizontaly),
it's a tantalum capacitor (Vishay brand)

Claude
 
On Sat, 27 Dec 2008 11:05:54 -0500, "Michael A. Terrell"
<mike.terrell@earthlink.net> put finger to keyboard and composed:

In the grade we used in our products, we
rarely saw a shorted ceramic SMD cap that wasn't physically damaged. I
found more shorted internal layers than shorted SMD ceramic caps.
Click to expand...
I haven't seen any shorted SMD ceramic caps, but in the 80s I saw many
shorted low voltage disc ceramics in American made equipment.

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

In a HP device I have 2 orange capacitors from which one is
short-circuited. The other one looks the same and is 680 nF. I know
that the voltage it will get is 28 volts.

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.
Click to expand...
Sorry, I don't do mind reading or remote viewing.

Graham
 
Eeyore wrote:
"P." wrote:

In a HP device I have 2 orange capacitors from which one is
short-circuited. The other one looks the same and is 680 nF. I know
that the voltage it will get is 28 volts.

My question:
Does anyone know what kind of capacitor this can be? Ceramic, mkt? It
is a SMD capacitor, size looks like 1206, maybe a little smaller. It
is rather thin. The color is orange. There is not text or marking on
the capacitor.

Sorry, I don't do mind reading or remote viewing.
Click to expand...

You don't have the required brainpower, with your pitiful 154 IQ.


--
http://improve-usenet.org/index.html

aioe.org, Goggle Groups, and Web TV users must request to be white
listed, or I will not see your messages.

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm


There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.
 
On Sun, 28 Dec 2008 09:22:23 +1100 Franc Zabkar
<fzabkar@iinternode.on.net> wrote in Message id:
<qkadl4pe2opq6p6965lmovtoj3tnj2f5rn@4ax.com>:

On Sat, 27 Dec 2008 11:05:54 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> put finger to keyboard and composed:

In the grade we used in our products, we
rarely saw a shorted ceramic SMD cap that wasn't physically damaged. I
found more shorted internal layers than shorted SMD ceramic caps.

I haven't seen any shorted SMD ceramic caps, but in the 80s I saw many
shorted low voltage disc ceramics in American made equipment.
Click to expand...
I've seen SMD caps short, but this was due to board flexing. The PCB was
too thin for this particular application. Boards were manufactured as a
pallet of 40 pcs. with breakaway drill holes, and when they were broken
apart there was excessive flexing. For some reason this caused a high
failure rate in the caps, many of which did not fail until they were
deployed in the field.
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top