ceramics capacitors what is the capacitance?

I have radio shack part 272-801 pkg. of 100

But the only thing on each capacitor is an underlined number.
Like

151
----

1
--

...etc are these in uF, nF, pF , F or what?

And with these ceramic disc capacitors does it matter which way I put them in?

Their legs are both the same size. So I don't think their is a difference no plus sign or - on any sides.

 

http://www.radiodaze.com/capacitor_ID.htm

Ceramic capacitors are not polarized. Put them in either way.

 

The marking 151 means that is a 150pF capacitor.
Under this numbering scheme the first 2 digits are the value and last digit is the number of zeros to add to the end of value. It is always expressed in picofarad.

 

The marking 151 means that is a 150pF capacitor.
Under this numbering scheme the first 2 digits are the value and last digit is the number of zeros to add to the end of value. It is always expressed in picofarad.

What happens if I have just
1 is that 1pF because not all of these capacitors have 3 digit numbers.
-

What happens for the 1 or 2 digit numbers ? Do I take the missing digits to be zero's?
And will their every be a 4 or 5 digit number ...?

Thanks for your help

Also I am just wondering in electronics what the most used sizes for a capacitor is.
Is it like pF or nF or uF ??? And the usually range. I know they all have uses but just wondering what the majority of them and their ranges.

 

Hello,

Here is a page on component codes.
http://www.educypedia.be/electronics/datacomponent.htm

On this page you will find this page about capacitor coding.
http://www.twysted-pair.com/capidcds.htm

Greetings,
Bertus

 

What happens if I have just
1 is that 1pF?

Yes.

What happens for the 1 or 2 digit numbers ? Do I take the missing digits to be zero's?

No. For the capacitors that you purchased, a 1 or 2 digit value is the capacitance in pF.

And will their every be a 4 or 5 digit number ...?

Not in that assortment.

Also I am just wondering in electronics what the most used sizes for a capacitor is.

It depends upon the application. For a DC power supply, you might use a 10,000uF capacitor after the bridge rectifier, and a 10uF plus a 0.1uF cap after the regulator. If you're building a TTL or CMOS logic circuit, you'll use 0.1uF (100nF) "bypass" capacitors across the supply pins to help keep transients under control.

Is it like pF or nF or uF ??? And the usually range. I know they all have uses but just wondering what the majority of them and their ranges.

Low pF values are used in radio frequency circuits.
High pF/low nF values can be used in timer/oscillator circuits.
100nF caps are widely used as bypass capacitors, also used in timer/oscillator circuits.
1uF-100uF caps are frequently used in audio applications.
Larger caps are usually used in power supplies.