T491V476M010ZT

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Tantalum capacitors are highly reliable capacitors in electronic circuits. The T491V476M010ZT, one of its members, is a high-temperature, long-life, solid-electrolyte chip capacitor, with a wide range of application fields. It is specially built with low thermal resistance, high reliability, high capacitance retention at high temperature, low impedance and low cost. In this article, the application fields and working principles of T491V476M010ZT capacitors are discussed.

Application Fields

T491V476M010ZT capacitors offer a very wide and diverse range of application fields, due to its rare combination of features. It is commonly used in automotive, aerospace, audio-video, mining, unmanned aerial vehicles, robotics, medical instruments, aerospace and space vehicles, consumer electronics, computer and telecommunications equipment, motor control equipment, industrial process control systems, and more.

These capacitors are particularly well suited for handling high temperature operation due to their high thermal shock-resistance. Their high capacitance retention at high temperature is one of the key characteristics that make them suitable for various high-temperature applications, such as power supplies and motor control equipment. Additionally, the low impedance makes them perfect for power supplies, automotive electronics, and telecommunications equipment, amongst others. Furthermore, their low cost makes them attractive for many consumer electronics and space applications.

Working Principle

T491V476M010ZT capacitors are solid-electrolyte chip capacitors, with a tantalum pentoxide film dielectric, and MnO2 as the solid-electrolyte. The working principle consists of two layers of tantalum pentoxide electrodes, separated by an insulating dielectric material, the MnO2 solid-electrolyte. The capacitor is then formed by sandwiching these two layers of film between two lead plates.

The two tantalum pentoxide films are isolated from each other, forming a charge-carrying layer that acts as the capacitor plate. The MnO2 solid-electrolyte that separates the two plates stores energy by letting electrons flow across it, forming a layer of electric charge, which compensates for potential differences between the two plates, creating an electric field that acts as a capacitor.

The working of the capacitor is dependent upon the insulation resistance of the dielectric material, which provides the barrier between the two electrodes. As the temperature increases, this insulation resistance decreases, causing the capacitance to reduce. This is why this type of capacitor is perfectly suited for high-temperature applications.

Conclusion

The T491V476M010ZT capacitor is a high-temperature, long-life, solid-electrolyte chip capacitor with a wide range of application fields, including automotive, aerospace, audio-video, mining, robotics, and more. Its rare combination of features, such as low thermal resistance, high reliability, high capacitance retention at high temperature, low impedance and low cost, make it a preferred choice for many applications. Its working principle involves two layers of tantalum pentoxide electrodes, separated by an insulating dielectric material, the MnO2 solid-electrolyte.

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