T491B474M035AG

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T491B474M035AG is a tantalum capacitor, which is widely used for various applications for its small size, low equivalent series resistance, high reliability, and high energy density. It has been used in automotive, medical, and industrial applications due to its robustness and high reliability. It is also commonly used in high-frequency switching supplies, radio-frequency electronics, and defense-related systems.

It is able to be applied in the filter circuits and decoupling of the power supplies. The filter circuits consist of an inductor and a capacitor. The inductor typically has a high reactance against signals of higher frequencies while the capacitor primarily acts as a filter to eliminate high frequency interference. The decoupling circuits make sure that power supplies are securely isolated from each other as well as the rest of the circuit. In particular, the T491B474M035AG has long lead times which makes it beneficial for its use in these capacitive-critical filtering and decoupling applications where the timing of the part is crucial for the circuit\'s performance.

In addition, T491B474M035AG`s excellent stability and low equivalent series resistance are also advantageous for a range of other applications such as energy storage, pulse energy, timing applications and frequency stabilization.

The working principle of T491B474M035AG is based on the properties of electrostatic energy storage. When a voltage is applied to it, a charge accumulates on the capacitor\'s plates until the electrical field that is produced is strong enough to overcome the built-in resistance. Once the field is built up, it polarizes the dielectric material, resulting in the capacitance value (capacitance). Aside from that, it also has a parasitic resistance or ESL that is determined by its ESR, which is a combination of the capacitor\'s internal resistance and leakage current.

The main components of the T491B474M035AG are an anode (positive terminal), a dielectric material, a cathode (negative terminal), and a case that protects the capacitor from external influences. The dielectric material is constructed from tantalum pentoxide, which is a combination of titanium and tantalum oxides. It has a high dielectric constant and very low leakage current, making it very effective in storing electrostatic energy. Moreover, its construction with a PEDOT material provides a good combination between reliability and surge capability.

T491B474M035AG also has a nonlinear voltage coefficient and a temperature coefficient, which influence the capacitor’s capacitance and voltage limits. Its capacitance is typically rated at 25mF, temperature limit up to 85°C, operating temperature range between -55°C to 85°C and various voltage ratings depending on the application.

Therefore, T491B474M035AG is widely used for various applications due to its great features, such as small size, low equivalent series resistance, high reliability, and energy density. As mentioned above, its application fields mainly cover filter circuits, decoupling of the power supplies, energy storage, pulse energy, timing applications, and frequency stabilization. Its working principle is based on the properties of electrostatic energy storage and it is constructed from tantalum pentoxide which is a combination of titanium and tantalum oxides.

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