The difference between high frequency and low frequency capacitors: 1. Low-frequency capacitor have large capacitance and are prone to leakage, while high-frequency electrolytic capacitor will not. 2. The internal resistance of low-frequency capacitor is larger than that of high-frequency electrolytic capacitor. 3. The capacity of high frequency capacitor is generally not as large as that of low frequency capacitor. 4. High-frequency capacitors are suitable for circuits with higher frequencies, while low-frequency capacitor are suitable for circuits with lower frequencies.

Any capacitor manufactured is not an ideal capacitor. There is dielectric loss. Capacitors with small dielectric loss are suitable for high-frequency circuits. Those with large dielectric loss can only work at low frequencies. This is called the frequency characteristics of capacitor. Capacitor frequency characteristics refer to When a capacitor works in an AC circuit (especially in a high frequency circuit), its capacitance and other parameters will change with the change of frequency. When the capacitor is working in a high-frequency circuit, the dielectric constant of the capacitor material will decrease as the frequency of the working circuit increases. The electrical loss at this time will also increase. Different types of capacitors have different dielectric parameters, and they are not interchangeable in many cases.