Aluminum Electrolytic Capacitor
Aluminum electrolytic capacitors use a thin oxide film, formed on an aluminum anode through electrolysis, as the dielectric. Since these films can be made extremely thin, these capacitors are the standard choice for high-capacitance applications. However, typical disadvantages include limited frequency and temperature characteristics, leakage current, and dielectric loss.
Tantalum Capacitor
These electrolytic type capacitors use tantalum for the anode.
Compared to aluminum electrolytic capacitors, they have excellent leakage current, frequency, and temperature characteristics.
Electric Double Layer Capacitor
These capacitors use an organic electrolytic solution and also an electric double layer formed on the surface of an activated carbon electrode as a dielectric. They have a capacitance thousands of times greater than aluminum electrolytic capacitors and offer a very long cycle life, without the strict charge/discharge cycle limitations of batteries.
Ceramic Capacitor
These capacitors generally fall into three categories based on the ceramic material used: low dielectric constant (Class 1), high dielectric constant (Class 2), and semiconductor types. Notably, high dielectric constant capacitors exhibit changes in capacitance when voltage is applied (DC bias characteristics), a behavior that becomes more pronounced with higher dielectric constants.
Film Capacitor
Polyester, polypropylene, or other plastic films are sandwiched between electrode foils and typically wound into a cylindrical shape. These capacitors are nonpolar, with high insulation resistance and low dielectric loss. In addition, they also have good frequency and temperature characteristics.
Mica Capacitor
These capacitors use mica, a highly stable natural mineral, as the dielectric. Although mica capacitors have excellent characteristics such as insulation resistance, dielectric loss tangent, frequency, and temperature characteristics, a disadvantage is that they are expensive.
Related Technical Articles
Recommended products
Matsusada Precision's DC power supplies, high-voltage power supplies, and X-ray inspection systems provide reliable solutions for capacitor and circuit testing applications worldwide.
