# Parameters needed to identify the correct capacitor

In a traditional power switching supply PCB like this one,

(source of the image)

ceramic capacitors are sometimes present as discrete components. They appear as:

(source of the image)

I would like to correctly identify them, when no schematics is available, to replace them if/when they get damaged. In the case of the above image, these parameters can be obtained:

• the capacitance 822, which, according to this answer, is: 82*10^2 pF = 8.2 nF;
• the tolerance Z, which, according to this table, is -20 %, +80%;
• the voltage rating 1KV, which is 1000 V.

(A letter can occasionally appear above these parameters, and I do not know its significance).

Is any ceramic capacitor, which has these same values, suitable to replace the above one, or other features must be taken into account when replacing such a component?

This question is related to a previous one.

• Very rarely these tpyes of ceramic capacitors are broken. Mostly it is the electrolytic capacitors that have to be replaced. Otherwise it should be sufficient if you consider your given parameters for the ceramic types. – Tom Kuschel Jan 11 at 18:04
• @TomKuschel Unfortunately I've seen these capacitors popped in more than one PCB, maybe due to some unexpected voltage spike in the power line. This is why I'm asking. – BowPark Jan 11 at 18:12