The same value, written every way
| 3-digit code | 681 |
|---|---|
| IEC code | 680p |
| Picofarads | 680 pF |
| Nanofarads | 0.68 nF |
| Microfarads | 0.00068 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 |
|---|---|
| 681J | 680 pF, ± 5 % |
| 681K | 680 pF, ± 10 % |
| 681M | 680 pF, ± 20 % |
| 681Z | 680 pF, +80 / −20 % |
| 2A681J | 680 pF, ± 5 %, rated 100 V |
| 1H681K | 680 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 681 capacitor?
A capacitor marked 681 is 680 pF: 68 followed by one zero in picofarads, 680 pF, which is also 0.68 nF = 0.00068 µF.
What is 681 in µF and nF?
681 = 680 pF = 0.68 nF = 0.00068 µF.
What do 681J, 681K and 681M mean?
The same capacitance, 680 pF, with a tolerance of ± 5 % (J), ± 10 % (K) or ± 20 % (M).
Other common codes
101 151 221 331 471 680 682 683 684
Code system: EIA three-digit capacitance code and IEC 60062 tolerance letters.