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How the SMD Capacitor (ceramic and tantalum)values are read?

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zahidkhan

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How the SMD Capacitor (ceramic and tantalum)values are read.
 

smd capacitor marking

But as far as I have seen,
SMD capacitor or inductors has no value on top.
Only resistor has value on top;
and it reads like 104 ==> 100Kohm; 103 ==> 10Kohm,

have fun,
 

how to find smd capacitor value

Then how do we identify and choose particular capacitor ?
 

smd value

Dear Sir:

First of all, very carefully store them
in well labeled format.

Then a small handy capacitor meter shall be very useful,
for debuging purpose.

Have fun,
 

smd values

jcpu said:
Dear Sir:

First of all, very carefully store them
in well labeled format.

Then a small handy capacitor meter shall be very useful,
for debuging purpose.

Have fun,
Click to expand...

so is it not possible to use caps from thrown away equipment. like cd-rom boards . HD drives etc...
 

how to read smt value

cap value 104==>10*10^4 = =>100000pF = 100nF or 4u7==>4.7uF ok
 

how to find smd cap values

As far as I have seen,
from 0805 to 0603 to 0402 generation
SMD cap are not labeled.

Please be extremly careful re-cycling those parts.
They can cost you hours debuging,
unless for some cap values difficult to obtain.
 

how to read smd values

It is true that normal SMD capacitors have no marking codes written, but there are series that have them, like high-Q and high-freq caps... I'll try to find a table for SMD capacitor marking codes vs. values.
 

hint and tips on reading capacitor

tnen said:
cap value 104==>10000pF = 10nF or 4u7==>4.7uF ok
Click to expand...

THEN:

I think you make a mistake when you said "cap value 104==>10000pF = 10nF or 4u7==>4.7uF ok".

If you read 104 in the capacitor, it means 100000pF, so, the real value is 100nF and not 10nF as you said.

Be carefully when you write a post, you can confuse to others.

Best Regards.

GuillerMo

Added after 2 hours 52 minutes:

Often smd electrolytic capacitors are marked whit the value and working voltage.
Sometimes they marked it as "XX xV" (where XX is the capacitor value in uF and xV is the volage).
Another way of marking the voltages is using a simple code, here I give you the codes I remember:

e = 2.5 Volts
A = 10 Volts
C= 16 Volts
D = 20 Volts
E = 25 Volts
V = 35 Volts
H = 50 Volts

I´m sure that exists more codes, but I don´t remember anymore.

Best Regards.

GuillerMo
 

cap value 104

gdaporta ;


Haklısın bir hata yapmışım özür dilerim.
104 = 10*10000pF =100000 = 100nF dır
tekrar özür...:cry:
 

4u7 capacitor value

zahidkhan said:
so is it not possible to use caps from thrown away equipment. like cd-rom boards . HD drives etc...
Click to expand...
It is possible, but can be a waste of time unless you know what your looking for.

ie if I am just looking for some large bypass caps or filter inductors they are easy to find, but a specific value I would have to go probing around for a while. So if you would like to do it, get a LCR meter and some needlepoint probes.

Or you could use an oven to melt all of the components off and sort them by hand, but measuring loose SMD parts is fairly tough.
 

smd code rading

tnen said:
gdaporta ;


Haklısın bir hata yapmışım özür dilerim.
104 = 10*10000pF =100000 = 100nF dır
tekrar özür...:cry:
Click to expand...

THEN

I don´t understand you, I think better to talk in english as it is an english forum.

I supposed you understand my opinion about your mistake, becouse you reedit your post.

Best Regards

Guillermo
 

reading capacitor

**broken link removed**
 

100nf capacitor marking 103

Hi,
Only Polarized or Electrolytic SMD capasitors carry MARKINGS but no non-polar capacitors. In the early SMD days there was also marking for capacitors but not now. 104=100,000pF =100nF (simple add as many zeros to 10 for the first digit from right, in this case 4,,,,,, 10,0000) and like 101=100pF.
I have almost complete info on the SMD caps, resistors and semiconductors, any one wants contact me on:

raza_ra@walla.com

Enjoy :|
 

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