The same value, written every way
| 3-digit code | 103 |
|---|---|
| IEC code | 10n |
| Picofarads | 10,000 pF |
| Nanofarads | 10 nF |
| Microfarads | 0.01 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 |
|---|---|
| 103J | 10 nF, ± 5 % |
| 103K | 10 nF, ± 10 % |
| 103M | 10 nF, ± 20 % |
| 103Z | 10 nF, +80 / −20 % |
| 2A103J | 10 nF, ± 5 %, rated 100 V |
| 1H103K | 10 nF, ± 10 %, rated 50 V |
Where you meet it
Values like this are common in RC filters, button debouncing and timing networks.
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 103 capacitor?
A capacitor marked 103 is 10 nF: 10 followed by 3 zeros in picofarads, 10,000 pF, which is also 0.01 µF.
What is 103 in µF and nF?
103 = 10,000 pF = 10 nF = 0.01 µF.
What do 103J, 103K and 103M mean?
The same capacitance, 10 nF, with a tolerance of ± 5 % (J), ± 10 % (K) or ± 20 % (M).
Other common codes
100 101 102 104 105 106 107 153 223 333 473 683
Code system: EIA three-digit capacitance code and IEC 60062 tolerance letters.