Value of SMD capacitor

Perry Babin · 9th February 2009, 03:39 AM

Can anyone tell me where I can find the code to determine the value of this capacitor. It's an 0805 size. Thanks in advance.

infinia · 9th February 2009, 03:49 AM

Hi
It's markings youre looking for is most probably on the bottom side. Look for other similar caps on the board to get a better clue on these. I guess no schematics are avalible?
BTW impressive photo shot! How did you do that?

looked it up myself
edit>http://www.dpreview.com/reviews/canons3is/page2.asp
&cropped macro shot

Perry Babin · 9th February 2009, 04:00 AM

Correct, no schematic available. The marking on the other side is the same.

The photo is not as good as it could be. The camera/lens can do better. It was taken with a canon S3 and a Raynox MSN-202 accessory lens on a LensMate adapter. This is a better example of what the lens can do. This is the stylus on an Audio Technica SLT88E cartridge.

infinia · 9th February 2009, 04:15 AM

Why do want to know... is it bad?
If it has same marking both sides..My guess would be 1pF ?K normally means 10% tol

http://my.execpc.com/~endlr/markings.html

Can you trace it out to a sub circuit.
Since you like to take pictures perhaps a wider shot with some background circuit/fuction info.

Perry Babin · 9th February 2009, 04:25 AM

It's shorted. It's a miller capacitor in an amplifier. I've seen values stated for it from 20pf to 100pf. Anything in that range would probably work. The one in the board measures 15pf. They both got hot so I'm not sure they're going to read the correct value. If I can find a chart, I'll know definitively the correct value.

Thanks for the help.

infinia · 9th February 2009, 04:36 AM

Might be Table 11 in the link I gave you above. I've never seen it those before.
K=22
color=red

Perry Babin · 10th February 2009, 05:23 AM

The information you provided helped me to find the following document. On page 5 it shows the marking code and logo.

http://www.kemet.com/kemet/web/homep...02_CeChPkg.pdf

Thanks again.

infinia · 10th February 2009, 06:21 AM

"Laser marking is available as an extra-cost option for
most KEMET ceramic chips. Such marking is two
sided, and includes a K to identify KEMET, followed by
two characters (per EIA-198 ....)"

"K" to identify KEMET
"A"=1 significant digit
"1"=10 multiplier

so it's a Kemet 10pF

altho we still dont know dielectric (temp limit), tolerance, or voltage.

Thanks I learned something too. A bit esoteric tho.

9th February 2009, 03:39 AM	#1
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Value of SMD capacitor Can anyone tell me where I can find the code to determine the value of this capacitor. It's an 0805 size. Thanks in advance. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

9th February 2009, 03:49 AM	#2
infinia diyAudio Member Join Date: May 2005 Location: Californication	Hi It's markings youre looking for is most probably on the bottom side. Look for other similar caps on the board to get a better clue on these. I guess no schematics are avalible? BTW impressive photo shot! How did you do that? looked it up myself edit>http://www.dpreview.com/reviews/canons3is/page2.asp &cropped macro shot __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

9th February 2009, 04:00 AM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Correct, no schematic available. The marking on the other side is the same. The photo is not as good as it could be. The camera/lens can do better. It was taken with a canon S3 and a Raynox MSN-202 accessory lens on a LensMate adapter. This is a better example of what the lens can do. This is the stylus on an Audio Technica SLT88E cartridge. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

9th February 2009, 04:15 AM	#4
infinia diyAudio Member Join Date: May 2005 Location: Californication	Why do want to know... is it bad? If it has same marking both sides..My guess would be 1pF ?K normally means 10% tol http://my.execpc.com/~endlr/markings.html Can you trace it out to a sub circuit. Since you like to take pictures perhaps a wider shot with some background circuit/fuction info. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

9th February 2009, 04:25 AM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It's shorted. It's a miller capacitor in an amplifier. I've seen values stated for it from 20pf to 100pf. Anything in that range would probably work. The one in the board measures 15pf. They both got hot so I'm not sure they're going to read the correct value. If I can find a chart, I'll know definitively the correct value. Thanks for the help. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links


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9th February 2009, 04:36 AM	#6
infinia diyAudio Member Join Date: May 2005 Location: Californication	Might be Table 11 in the link I gave you above. I've never seen it those before. K=22 color=red __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

10th February 2009, 05:23 AM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The information you provided helped me to find the following document. On page 5 it shows the marking code and logo. http://www.kemet.com/kemet/web/homep...02_CeChPkg.pdf Thanks again. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

10th February 2009, 06:21 AM	#8
infinia diyAudio Member Join Date: May 2005 Location: Californication	In Conclusion "Laser marking is available as an extra-cost option for most KEMET ceramic chips. Such marking is two sided, and includes a K to identify KEMET, followed by two characters (per EIA-198 ....)" "K" to identify KEMET "A"=1 significant digit "1"=10 multiplier so it's a Kemet 10pF altho we still dont know dielectric (temp limit), tolerance, or voltage. Thanks I learned something too. A bit esoteric tho. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

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