T86D157K6R3ESAS

Tantalum Capacitors

Tantalum capacitors are capacitors that use tantalum as the anode or main body electrodes. They are widely used in electronic circuits such as computers, cell phones, and other consumer electronics because they have many advantages over other types of capacitors. This article will discuss the application field and working principle of T86D157K6R3ESAS capacitors in detail.

Application Field

Tantalum capacitors are mainly used in applications where a high capacitance density is desirable. This is because they have a higher capacitance-to-volume ratio than other types of capacitors, which makes them ideal for high density designs. Additionally, they have superior temperature characteristics; their capacitance value remains stable over a wide operating temperature range.

Tantalum capacitors are particularly suitable for applications demanding high-speed, high-reliability switching capabilities. They have low equivalent series resistance (ESR) and minimal internal heating, which means they are less affected by circuit inductance and can handle high-frequency signals with excellent switching speeds. Their excellent noise-suppression capabilities make them ideal for noise-sensitive applications such as pulsed power circuitry.

Due to their superior temperature characteristics, they are often used in high reliability applications such as military, aerospace, and medical electronics. In addition, they have excellent temperature cycle, shock, and vibration resistance, making them well suited for automotive and industrial electronics. Tantalum capacitors are often the preferred choice in products that require long-term reliability.

Working Principle

Tantalum capacitors are constructed using a porous tantalum anode material and a counter-electrode made of conductive electrolytes. This is covered with an insulating dielectric layer containing a non-conductive material such as tantalum pentoxide. The anode and counter-electrode are separated by a barrier layer to prevent leakage. The layers are sealed, creating a hermetically sealed capacitor.

When a voltage is applied across the capacitor, the anode material accumulates electrons, becoming negatively charged. This results in an electrical field between the two terminals; when a current is applied, the electrons flow from the negatively charged anode to the positively charged counter-electrode. The result is a capacitance, which is a measure of the amount of electrical charge stored. The stored charge is proportional to the capacitance value.

Tantalum capacitors are highly reliable and have a very long life. The internal material layers provide excellent temperature performance and the hermetic seal ensures minimal leakage. Due to their superior electrical characteristics, tantalum capacitors are an excellent choice for many high-reliability applications.