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Capacitor Helpful Hints

Capacitor Helpful Hints

Capacitor Values & Units

Capacitors typically have values in either picofarads (pF) or microfarads (μF).

1 pF = .000001 μF

 To convert pF to μF, multiply by .000001

Example: 4700 pF = .0047 μF

 To convert μF to pF, multiply by 1,000,000

Example: .0033 μF = 3300 pF

 Note: Many pieces of vintage equipment referred to capacitance units in micromicrofarads .

This unit is now referred to as picofarads (pF).


Capacitor Markings

The values of film and ceramic disk capacitors are typically marked in picofarads (pF) using a

3 digit number followed by a letter, for example:


The first 2 digits are the two significant values of the capacitance and the 3rd digit is number of following zeroes.

For the above example, the value is 6800 pF = .0068 μF

The letter following the three digits is typically the value tolerance, where:

J = 5% K = 10% M = 20%


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