331 capacitor value

The code 331 reads as 33 × 10¹ pF: 330 pF, which is the same as 0.33 nF or 0.00033 µF.

The value in each unit

330pF

0.33nF

0.00033µF

Open 331 in the capacitor code calculator →

With a tolerance letter

Marking	Tolerance	Minimum	Maximum
`331J`	±5%	0.000314 µF	0.000347 µF
`331K`	±10%	0.000297 µF	0.000363 µF
`331M`	±20%	0.000264 µF	0.000396 µF

Other ways it's marked

On schematics and parts lists, the same capacitor appears as 330p, 0.33 nF or 0.00033 µF.

Where it's used

Values below 1 nF are typical in radio circuits, oscillators and high-frequency filters, usually as C0G (NP0) ceramic capacitors, which stay stable with temperature.

Nearby codes

← 221 = 220 pF 471 = 470 pF →

Capacitor code chart →

Frequently asked questions

What is the value of a 331 capacitor?

330 pF, the same as 0.33 nF or 0.00033 µF.

Is 331 the same as 330p?

Yes. 331 is the 3-digit code and 330p is the letter code for the same 330 pF.

What does the letter after 331 mean?

It's the tolerance: 331J is ±5%, 331K is ±10% and 331M is ±20%.

Does the code 331 show the voltage?

No. The voltage is printed separately (such as 50V, or a code like 2A, which means 100 V) or only given in the datasheet. Replace it with a capacitor rated for the same voltage or higher.