The same value, written every way
| 3-digit code | 101 |
|---|---|
| IEC code | 100p |
| Picofarads | 100 pF |
| Nanofarads | 0.1 nF |
| Microfarads | 0.0001 µF |
| Standard series | E6 value |
With a letter or a voltage code
The letter after the code is the tolerance, and a digit-letter pair in front of it is the rated voltage on film capacitors and some ceramics:
| Marking | Meaning |
|---|---|
| 101J | 100 pF, ± 5 % |
| 101K | 100 pF, ± 10 % |
| 101M | 100 pF, ± 20 % |
| 101Z | 100 pF, +80 / −20 % |
| 2A101J | 100 pF, ± 5 %, rated 100 V |
| 1H101K | 100 pF, ± 10 %, rated 50 V |
Where you meet it
Picofarad values are used in RF circuits, oscillators and small filters, mostly as C0G (NP0) ceramics that keep their value with temperature.
Open the capacitor code calculator →Have a letter, a voltage code or a different value? The calculator reads any marking and gives the code for any value.
Frequently asked questions
What is a 101 capacitor?
A capacitor marked 101 is 100 pF: 10 followed by one zero in picofarads, 100 pF, which is also 0.1 nF = 0.0001 µF.
What is 101 in µF and nF?
101 = 100 pF = 0.1 nF = 0.0001 µF.
What do 101J, 101K and 101M mean?
The same capacitance, 100 pF, with a tolerance of ± 5 % (J), ± 10 % (K) or ± 20 % (M).
Other common codes
100 102 103 104 105 106 107 151 221 331 471 681
Code system: EIA three-digit capacitance code and IEC 60062 tolerance letters.