T491A155K020ZT7280

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Tantalum capacitors, also known as tantalum electrolytic capacitors, are highly stable capacitors and provide a large capacitance value with very small dimensions due to the physical properties of tantalum. Tantalum capacitors are popular in many electronic circuits, especially with tolerance and temperature coefficients. The T491A155K020ZT7280 is a tantalum capacitor and is used in various applications such as low-frequency signal bypassing, blocking, frequency correction, timing, synchronization and memory backup, voltage stabilization, and coupling/decoupling.

Working Principle: The T491A155K020ZT7280 is a type of axial-leaded tantalum capacitor that employs a solid manganese dioxide (MnO2) dielectric system. It consists of a tantalum wire, an anode cap, a dielectric oxide layer, a cathode cap, two lead wires, and a safety vent. The anode cap is composed of manganese dioxide (MnO2) and is sintered onto a tantalum wire. The cathode cap is formed from an epoxy-phenolic resin and serves as a cathode terminal. The two lead wires are composed of tin plated copper, which are soldered to the respective capacitor terminals.

From a working point of view, the oxide layer acts as an electrical insulator between the anode cap and the cathode cap. The electrical charge is directly proportional to the capacitance value. When voltage (a.c. or d.c.) is applied across the terminals of a tantalum capacitor, the electrical charge starts building up on the anode cap, while the dielectric oxide layer produces an opposing force to the charge build-up. This opposing force increases with increasing applied voltage, thereby restricting the current flow.

When the voltage reaches a certain level, the opposing charge is overcome by the external voltage, which breaks down the dielectric oxide layer and creates a conductive path between the anode and cathode. This physical breakdown is known as a short-circuit, and it prevents the capacitor from storing any additional electrical charge on the anode. In the event of a short-circuit, the safety vent is designed to protect the capacitor from further damage.

Application Field: The T491A155K020ZT7280 tantalum capacitor is widely used in many applications due to its low equivalent series resistance (ESR) and wide temperature range. It is often used as an intermittent or continuous frequency bypass, blocking, or integrating device in electronic circuits. Additionally, it is well suited for low-frequency signal bypassing, blocking, frequency correction, timing, synchronization, and memory backup. Furthermore, it can be used for voltage stabilization, coupling/decoupling, and capacitive-divider circuits.

In addition to its applications in electronics, the T491A155K020ZT7280 is especially suited for use in defense, aerospace, and industrial applications. For example, it can be used in high-temperature, high-reliability power supplies, and temperature-dependent timing circuits. It can also be used in high-energy storage applications, motor drive systems, and medical equipment. Its small form factor and low-profile make it ideal for artificial satellite systems and space applications.

The T491A155K020ZT7280 is one of the most popular tantalum capacitors due to its superior performance. Its low ESR and wide temperature range allow it to operate in a wide variety of applications. Furthermore, due to its small size, the T491A155K020ZT7280 is especially suited for use in embedded and aerospace applications where space is at a premium. With its superior performance, the T491A155K020ZT7280 is the preferred choice for many electronics applications.

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