Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitor. Characterized by their large capacitance values, and small form factor, tantalum capacitors are often used where high capacitance is needed. They also experience greater life expectancy than other capacitor types.

199D225X9035B1V1E3 Application Field and Working Principle

The 199D225X9035B1V1E3 is a surface mounted tantalum capacitor specifically designed for use in high-reliability, high-temperature aerospace applications. This capacitor uses an anode made of tantalum and a cathode made of niobium. The anode and cathode plates are then immersed in a conductive organic liquid and surrounded by a solid state electrolyte. Together, these form the basis of the capacitor’s charging and discharging cycle.

When the capacitor is not being used, a buildup of electrostatic charges slows the flow of current. This gradual slowing of current builds up voltage, creating a potential difference between the capacitor’s traces. When a voltage greater than the capacitor’s rating is applied, current will flow through the liquid electrolyte, allowing the capacitor to become charged. Upon the removal of the voltage, the capacitor will discharge, removing the stored electrical charge.

Due to its high capacitance, low ESR (Equivalent Series Resistance), and long lifespan, these capacitors are incredibly useful in applications that require prolonged periods of reliable use. Such applications include aircraft power systems, military electronics, medical electronics, and energy systems among others. While the small size and extended lifespan of tantalum capacitors make them invaluable components in many electronics, they are quite expensive as compared to other capacitor types.