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Tantalum Capacitors

Tantalum capacitors, also known as an electrolytic capacitor, are a type of capacitor that uses electrolytic oxide films as the dielectric material, and the anode is a metal with the same chemical element as the oxide film. This type of capacitor is widely used because of its large capacitance, small size, and long working life.

T491X476K035AT7280: Application Field and Working Principle

T491X476K035AT7280 is a green and small-size chip tantalum capacitor, with a reliable structure and good temperature characteristics. It is mainly used in communication devices, laptop computers, game consoles, routers, and other electronic equipment to maintain steady performance over a long period of time.

The working principle of T491X476K035AT7280 is that the anode is made of a tantalum material and the cathode is made of titanium or niobium material. The electrolyte, which is usually sulfuric acid, potassium hydroxide, ammonium bicarbonate, or an organic electrolyte solution, forms an electrolytic oxide film on the surface of the anode. With the application of an electric potential, electrons flow from the cathode to the anode and positive ions move from the anode to the cathode.

The electrolyte is stored in a pocket formed in the anode. This pocket is also filled with a solid dielectric material, such as an oxide or nitride, to prevent electrical shorts and leaks. When a voltage differential is applied across the capacitor terminals, the dielectric material accumulates electrical charge, and this charge creates an electric field.

The electric field between the terminals of the capacitor is proportional to the voltage differential. As the capacitance increases, the time required to reach full charge decreases. This process enables the capacitor to discharge and store electrical energy.

Advantages of T491X476K035AT7280

T491X476K035AT7280 has many advantages compared to other capacitors, such as:

• It has a large capacitance in a small size.
• It has a longer operational life with low losses.
• It has very high current leakage.
• It has excellent temperature characteristics.
• It has low and stable dielectric absorption.

Disadvantages of T491X476K035AT7280

T491X476K035AT7280 has some disadvantages, such as:

• It has high installed cost.
• It has high voltage stress and low impulse life.
• It is slightly difficult to repair.
• It is a polarized component.

Despite its disadvantages, T491X476K035AT7280 is still widely used due to its excellent characteristics, such as high reliability, long operational life, and small size compared to other capacitors.

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