What is tantalum capacitor, and what are the differences between tantalum capacitor and electrolytic capacitor? 4

(1). Principle and Structure

caluminum oxide (Al2O3) as the insulation layer, and negative electrode plate. The electrolyte of tantalum capacitors is a high impedance aluminum oxide film with a very high dielectric constant and extremely low capacitor leakage current. The principle is to utilize the high dielectric constant and good capacitance performance of alumina, and use tantalum metal film and alumina film as positive and negative plates respectively to form a capacitor.diode

Electrolytic capacitor is an electrolyte capacitor composed of aluminum foil or tungsten wire as the positive electrode plate, and aluminum oxide (Al2O3) as the insulation layer and negative electrode plate. The electrolyte of electrolytic capacitors is a low impedance aluminum oxide film with good conductivity and low capacitance leakage current. The principle is to utilize the high dielectric constant and good capacitance performance of alumina, and use aluminum foil or tungsten wire film and alumina film as positive and negative plates respectively to form a capacitor.diode

(2). capacitance value

The capacitance value of tantalum capacitors is smaller than that of electrolytic capacitors, generally ranging from a few microfarads to several hundred microfarads. The capacitance value of electrolytic capacitors is relatively large, generally ranging from a few millifarads to several hundred millifarads.diode

(3). Working Voltage

The working voltage of tantalum capacitors is higher than that of electrolytic capacitors, generally ranging from tens to hundreds of volts. The working voltage of electrolytic capacitors is relatively low, usually between a few volts and several tens of volts.diode