222 capacitor: 2.2 nF (0.0022 µF)
A capacitor marked 222 has a capacitance of 2.2 nF. The first two digits (22) are the value in picofarads and the last digit (2) is the number of zeros to add.
222 in every unit
| Picofarads | 2,200 pF |
|---|---|
| Nanofarads | 2.2 nF |
| Microfarads | 0.0022 µF |
| Farads | 2.2 × 10^-9 |
How to read 222
- Take the first two digits: 22.
- Add 2 zeros: 2,200 pF.
- Convert: 2,200 pF ÷ 1,000 = 2.2 nF; ÷ 1,000,000 = 0.0022 µF.
With tolerance and voltage letters
| Marking | Meaning |
|---|---|
222J | 2.2 nF, ±5% |
222K | 2.2 nF, ±10% |
222M | 2.2 nF, ±20% |
1H222K | 50 V, 2.2 nF, ±10% |
2A222J | 100 V, 2.2 nF, ±5% |
Typical uses
2.2 nF capacitors are used for filtering, EMI suppression (Y-class safety capacitors often have this value) and timing.
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FAQ
What is the value of a 222 capacitor?
2.2 nF (0.0022 µF): 22 × 10^2 pF = 2,200 pF.
What does 222J, 222K or 222M mean?
The letter is the tolerance: J = ±5%, K = ±10%, M = ±20%. The value is still 2.2 nF.
Can I replace a 222 capacitor with a different type?
Usually, if the capacitance, voltage rating and temperature characteristic are at least as good. Check the rated voltage, and remember ceramic capacitors lose capacitance at high DC voltage.
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