Frequently asked questions about ceramic capacitors

Ceramic capacitors are believed to be familiar to everyone. Ceramic capacitors are used as loop capacitors and pad capacitors in high-stability oscillator circuits for filtering, decoupling, and signal coupling.

1) Why is the ceramic capacitor easily broken by the pulse voltage?

A: All capacitors are easily broken down if they are over-voltage, except for the special capacitors such as X/Y safety capacitors.

2) What is the capacity of the ceramic capacitor 221K?

A: 221PF = 0.22NF = 0.00022UF. The three-digit capacitance is marked by the first two digits, the latter one is a few 0, 1 is a 0, which means 220, (if 224 is 4 0, it means 220000), k The unit that is not the capacitor is also called the accuracy level, k is the positive and negative ten percent of the capacity range, and the capacitance of the unit that is not marked in the capacitor world is a small unit (PF).

3) What is the appearance of the ceramic capacitor after repeated breakdown?

Answer: After repeated breakdown, the ceramic body should have burnt marks on the surface. The burnt marks are round, the middle is silvery gray, and the outer ring is black.