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How do I read ceramic disc capacitors?
I was wondering how to read them because I got an assorted pack at The Source (Canada's equivalent of Radio Shack) and all the orange ones have either two numbers or three numbers. There are no letters on them, AT ALL. I'm looking for a 1000pF 100V Ceramic Disc Capacitor.
I know for a fact that I need one of the orange ones because the blue ones are easy for me to read and I know that their values are MUCH higher than what I need.
I need help ASAP!
Another question actually. You ALL answered my question properly but I looked through the capacitors more closely and I can't seem to find a 102 and according to all of you, I need that one. But how can I substitute all the other ones for the 1000 pF one? I have almost a limitless supply of the 10 pF capacitors.
Some of these are underlined and some are not. What's the significance of this?
The format used is a"PQR" where PQ = first two significant digits and R denotes the number of subsequent zeros; units are pF.
Examples:
101 = 100 pF
102 = 1000 pF
103 = 10,000 pF = 0.01 uF
104 = 100,000 pF = 0.1 uF
Sometimes the voltage rating is included:
102 followed by 101 = 1000pF; 100v rating.
However, if the diameter of the ceramic cap. is about 0.25 inch, it's generally safe to use it with 100-v.d.c. across it; 0.5 inch → 500v.d.c.; 1 inch → 1kV. - as approximations.
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