T491A474M025ZTZ001

T491A474M025ZTZ001 is a type of tantalum capacitor. They are a class of electrolytic capacitors that are extremely robust and reliable for DC voltage applications. Even though their capacitance value is relatively small (in the microfarad-range) compared to other capacitor types, they are widely used due to their limits on working voltages up to 50V and their excellent characteristics at low temperatures. In addition to their low leakage current and high reliability, they also have good operating temperatures of -55°C to +125°C.

Tantalum capacitors consist of a tantalum core material, which is dielectric, and two plates of other electrode materials. These electrodes are typically made of aluminum, which is the anode and nichrome, which is the cathode. A thin layer of oxide is formed on the core material when a voltage is applied. This oxide layer serves as the insulation layer for the capacitor.

The main application field for T491A474M025ZTZ001 is in electronic circuits where large currents are required and long-term stable performance is needed such as DC/DC converters, power supplies, and automotive electronics. They are also often used for decoupling circuits and in applications where high ripple current is needed. In decoupling circuits, the tantalum capacitors are used to remove noise and spikes from power sources.

The working principle of a tantalum capacitor is based on an electrochemical process. When an electrical field is applied between the anode and cathode, an oxide layer is formed on the tantulum core, which serves as the dielectric material between the two plates. The electrical fields act on the area between the two electrodes, and the capacity of the capacitor is measured in terms of the amount of charge required to change the voltage between the two electrodes. The capacitance increases as the voltage increases; it decreases as the voltage decreases.

Tantalum capacitors have a wide range of applications, from small portable electronics to high power UPS systems. Their excellent temperature and voltage characteristics, long-term reliability and low leakage current make them an ideal choice for many electronic applications. They are reliable and stable enough for use in a high-end operational circuitry and can provide long-term stability even under harsh operating conditions.