Solid aluminum capacitors use solid conductive polymer materials as electrolytes. Due to the excellent properties of solid conductive polymer materials, solid aluminum capacitors also perform well in all aspects. The advantages are as follows:

1) The best performance of a solid aluminum capacitor is that it has an excellent impedance frequency similar to that of an ideal capacitor, and has a very low impedance value in a wide frequency range of 100 kHz to 1 MHz (see Fig. 1), so it is particularly suitable as a Filter capacitors to remove various noises such as ripple, pulse, digital, static, and audio in the circuit;

Figure 1 Comparison of frequency characteristics between solid aluminum capacitors and other types of capacitors

2) Solid aluminum capacitors allow a large ripple current to pass, so they can be used as switching power supply filter capacitors, greatly reducing the number or volume of capacitors used, and miniaturizing the circuit (see Table 1);

　　Table 1 Comparison of Filtering Ripple Capabilities of Capacitors at Ambient Temperature of 25 °C

3) Solid aluminum capacitors can be quickly discharged and can be used as backup capacitors in high-speed circuits that consume large currents;

4) The solid aluminum capacitor has excellent temperature characteristics and can maintain the capacity stability over a wide temperature range (see Figure 2), and the ESR value hardly changes with temperature (see Figure 3), so it can be applied to low temperature or high temperature. Equipment in the environment;

　　Figure 2 Different types of capacitor capacity - temperature curve

　　Figure 3 ESR-temperature curve of liquid, solid aluminum capacitors

5) The solid conductive polymer material has no volatility and is not easily lost during use. Therefore, the actual service life of the solid aluminum capacitor is much longer than that of the liquid aluminum capacitor;

6) Solid aluminum capacitors are much safer than liquid aluminum capacitors;

7) Solid aluminum capacitors are no different in appearance from traditional liquid aluminum capacitors. Customers do not need to change the circuit board structure and replace them directly with solid aluminum capacitors according to design requirements.