Can polyester capacitors be replaced by high-voltage ceramic capacitors?

The schematic diagram of the power amplifier input capacitor is written on a polyester capacitor. Can it be replaced by a ceramic capacitor? Yes, but with high voltage resistance, the high frequency performance of high voltage ceramic capacitors is better than polyester capacitors. No matter what capacitor you choose, you need to understand its use characteristics, but also consider the actual situation. So what are the advantages of polyester capacitors and high-voltage ceramic capacitors? Let's learn together!

Polyester capacitor refers to the electrode made of two pieces of metal foil, sandwiched in a very thin insulating medium, rolled into a cylindrical or flat cylindrical core, the medium is polyester, polyester film capacitor, high dielectric constant, small volume, large capacity The stability is good, and it is suitable as a bypass capacitor. Like many capacitors, polyester capacitors have many small classifications, such as the common CL11, CL21; the difference is that the inner wall of the CL21 capacitor uses metallization technology, which is much smaller than the CL11, but the overall performance is not as good as CL11. Therefore, you need to explain to the merchant when purchasing, which one to buy.

The advantage of high-voltage ceramic capacitors is that the capacity loss has high stability with temperature and frequency; the special series structure is suitable for high-voltage and long-term operational reliability; the high current climb rate is suitable for high-current loop non-inductive structures. The typical function of high-voltage ceramic capacitors is to eliminate high-frequency interference. It is widely used in negative ion products, lasers, X-ray machines, control equipment, high voltage packages, igniters, generators, transformers, power equipment, voltage doubler modules, and welding. Machines, electrostatic spraying and other electromechanical equipment that require high voltage and high frequency.

After reading the above introduction, the advantages of polyester capacitors and high-voltage ceramic capacitors are known. In the case of alternatives, you can consult an experienced technician to answer your questions!