Surface mount capacitors

[SAM]

Has anyone seen the capacitor code printed on surface mount capacitors, all
the surface mount capacitors I have seen in New Zealand sold for
manufacturing are blank. Most resistors are marked, e.g. 223 equals 22K Ohms

 

[I.F.]

Has anyone seen the capacitor code printed on surface mount capacitors,
all
the surface mount capacitors I have seen in New Zealand sold for
manufacturing are blank. Most resistors are marked, e.g. 223 equals 22K
Ohms

The few I've seen with a code have not had the value indicated - I'm not
sure if the codes I've seen are dielectric, tolerance or tempco!

 

[James Thompson]

Has anyone seen the capacitor code printed on surface mount capacitors,
all
the surface mount capacitors I have seen in New Zealand sold for
manufacturing are blank. Most resistors are marked, e.g. 223 equals 22K
Ohms

I have not been able to find any marked, too small most likely. I built a
capacitance meter mainly for that very purpose of surface mount ID. I seem
to have ended up with a drawer of misc parts and the meter is the only way
to find what you need. JTT

 

[Michael A. Terrell]

I have not been able to find any marked, too small most likely. I built a
capacitance meter mainly for that very purpose of surface mount ID. I seem
to have ended up with a drawer of misc parts and the meter is the only way
to find what you need. JTT

Some SMD ceramic capacitors are marked with a letter/number code.
The letter is the base value and the number is the multiplier. A
Javascript decoder is available on my website:
<http://home.earthlink.net/~mike.terrell/ID/SMD_caps.html>


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[I.F.]

I have not been able to find any marked, too small most likely. I built a
capacitance meter mainly for that very purpose of surface mount ID. I
seem to have ended up with a drawer of misc parts and the meter is the
only way to find what you need. JTT

The meter I use is a Peak-Atlas LCR40 with digital display, the price is a
bit nasty at £80 and the add on lead kit with croc-clips and SMD tweezer
probes is also nasty at £35, but it is a handy item of kit.

 

[James Thompson]

Some SMD ceramic capacitors are marked with a letter/number code.
The letter is the base value and the number is the multiplier. A
Javascript decoder is available on my website:
<http://home.earthlink.net/~mike.terrell/ID/SMD_caps.html>


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Thank you mike for that info. That is just what the doctor ordered. Now if I
can find the edison glases to read the codes

 

[SAM]

you said ==>too small most likely.


I say ===> pull my other tit, they are about the same size as resistors and
they are marked.

Has anyone seen the capacitor code printed on surface mount capacitors,
all
the surface mount capacitors I have seen in New Zealand sold for
manufacturing are blank. Most resistors are marked, e.g. 223 equals 22K
Ohms

I have not been able to find any marked, too small most likely. I built a
capacitance meter mainly for that very purpose of surface mount ID. I seem
to have ended up with a drawer of misc parts and the meter is the only way
to find what you need. JTT

 

[James Thompson]

you said ==>too small most likely.


I say ===> pull my other tit, they are about the same size as resistors
and
they are marked.









I have not been able to find any marked, too small most likely. I built a
capacitance meter mainly for that very purpose of surface mount ID. I
seem
to have ended up with a drawer of misc parts and the meter is the only way
to find what you need. JTT

Well maybe its my old eyes. I need glasses and a magnifier to read them.
You said in your original post they were not marked, and now you say they
are marked.
The small one's I have are not usually marked. 0805 is about as small as I
want to go.

 

[Michael A. Terrell]

you said ==>too small most likely.

I say ===> pull my other tit, they are about the same size as resistors and
they are marked.

Some are, and some are not. It usually costs more to purchase reels
of marked SMD capacitors and not all are installed right side up, if
they are marked. I worked in electronic manufacturing for a number of
years, and saw them come in both ways. We always tried to get marked
parts, but sometimes they were unavailable in time so we had to go to a
second or third source. The markings are faint at best. I read them
through a stereo microscope and some required a small drop of IPA to
make the marking visible.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Hal Murray]

Some are, and some are not. It usually costs more to purchase reels
of marked SMD capacitors and not all are installed right side up, if
they are marked. I worked in electronic manufacturing for a number of
years, and saw them come in both ways. We always tried to get marked
parts, but sometimes they were unavailable in time so we had to go to a
second or third source. The markings are faint at best. I read them
through a stereo microscope and some required a small drop of IPA to
make the marking visible.

So why are capacitors less likely to be marked than resistors?

There must be a good story there.

Most 0603 resistors I see are marked. 3 digits are easy to read.
I sometimes have to work a bit with letters on the 1% parts. (That's
after getting out a magnifying glass. My eyes don't focus up close
any more.)

I don't remember seeing any 0603 caps with markings.

 

[SAM]

yes that was my point I have never seen any 0603 capacitors marked
while 99.9% of 0603 resistors I have seen have been marked.

Some are, and some are not. It usually costs more to purchase reels
of marked SMD capacitors and not all are installed right side up, if
they are marked. I worked in electronic manufacturing for a number of
years, and saw them come in both ways. We always tried to get marked
parts, but sometimes they were unavailable in time so we had to go to a
second or third source. The markings are faint at best. I read them
through a stereo microscope and some required a small drop of IPA to
make the marking visible.

So why are capacitors less likely to be marked than resistors?

There must be a good story there.

Most 0603 resistors I see are marked. 3 digits are easy to read.
I sometimes have to work a bit with letters on the 1% parts. (That's
after getting out a magnifying glass. My eyes don't focus up close
any more.)

I don't remember seeing any 0603 caps with markings.

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