The same value, written every way
| 3-digit code | 684 |
|---|---|
| IEC code | 680n |
| Picofarads | 680,000 pF |
| Nanofarads | 680 nF |
| Microfarads | 0.68 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 |
|---|---|
| 684J | 680 nF, ± 5 % |
| 684K | 680 nF, ± 10 % |
| 684M | 680 nF, ± 20 % |
| 684Z | 680 nF, +80 / −20 % |
| 2A684J | 680 nF, ± 5 %, rated 100 V |
| 1H684K | 680 nF, ± 10 %, rated 50 V |
Where you meet it
Nanofarad values are used in filters, snubbers, timing and coupling, as ceramic (X7R, C0G) or film capacitors.
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 684 capacitor?
A capacitor marked 684 is 680 nF: 68 followed by 4 zeros in picofarads, 680,000 pF, which is also 0.68 µF.
What is 684 in µF and nF?
684 = 680,000 pF = 680 nF = 0.68 µF.
What do 684J, 684K and 684M mean?
The same capacitance, 680 nF, with a tolerance of ± 5 % (J), ± 10 % (K) or ± 20 % (M).
Other common codes
104 154 224 334 474 680 681 682 683
Code system: EIA three-digit capacitance code and IEC 60062 tolerance letters.