T551B476M050AT4251

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Tantalum - Polymer Capacitors, also known as polymer electrolytic capacitors, are a type of capacitor made of tantalum, manganese dioxide, and organic polymer material. They are suitable for applications ranging from computers, mobile phones, and digital audio players to industrial and automotive electronics. They have several advantages over other types of capacitors, including low internal resistance, low voltage, and low temperature coefficient, making them a very popular choice for high frequency devices.

The T551B476M050AT4251 is a type of tantalum - polymer capacitor. It is a low profile, surface mount, radial leaded tantalum capacitor with a capacitance rating of 4.7uF and a voltage rating of 16V. It has leads that are spaced 2.54mm (0.1") apart along its length, with a lead pitch of 0.9mm (0.035").

The T551B476M050AT4251 offers several advantages over conventional capacitors, including the following:

• High capacitance in a very small package.
• Ease of assembly due to a low profile and radial leads.
• High frequency response.
• Excellent stability with temperature variations.
• Good performance with high ripple current.

The T551B476M050AT4251 typically finds application in several fields such as mobile devices, high frequency switching power supplies, DC-DC converters, audio circuits, personal computers, memory modules, and high speed data transmission circuits. They are also used in applications where higher capacitance is needed in surface mount packages.

The working principle of the T551B476M050AT4251 is based on electrochemical double layer capacitance. It consists of a Ta (Tantalum) anode, a PEDOT:PSS (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) film electrolyte, and a MnO2 (Manganese dioxide) cathode. When a voltage is applied, theTa is oxidized, forming a Ta2O5 film surrounding the PEDOT:PSS, which forms a barrier to electron transport. The MnO2 serves as the electron acceptor, establishing a charge balance between the anode and cathode and providing capacitance.

In summary, the T551B476M050AT4251 is a low profile, low voltage, radial-leaded tantalum-polymer capacitor with a capacitance of 4.7uF and a voltage rating of 16V. It is widely used in applications such as mobile devices, high frequency switching power supplies, DC-DC converters, audio circuits, personal computers, memory modules, and high speed data transmission circuits due to its small size, excellent stability, and good high frequency response. The T551B476M050AT4251 works on the principle of electrochemical double layer capacitance, and its working is based on oxidation and electron transport.

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