By EECTECH | 25 July 2020 | 0 Comments
What is a high frequency and high voltage capacitor?
High-frequency capacitors refer to high-voltage capacitors that can operate in a high-frequency environment above 1KHZ or in a pulse frequency environment for a long time.
There are usually two types of high-frequency capacitors:
One is high-frequency capacitors, which are mainly high-frequency circuits represented by non-destructive testing, X-ray machines, and CT machines. The general frequency is between 20KHZ and 200KHZ. This type of capacitor generally uses FC medium, Y5T medium, and N4700 medium. Among them, The FC medium is the most stable because the TC change rate of FC is relatively stable.
The other is a pulse capacitor, generally PC medium, SF medium, N4700 medium. Among them, the PC medium capacitor has the longest pulse life, SF is the second, and the N4700 medium is relatively slightly worse. The same 50KV2000PF capacitor, if Pulse working in the air at a voltage of 30KV, after aging tests, the pulse life of PC capacitors exceeds 3 million times, the pulse life of SF is about 1 million times, and the life of high-voltage capacitors with N4700 medium is about 50,000 times.
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