TAP475K025SRW Capacitors

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Tantalum capacitors have become increasingly popular in the modern electronics industry due to their long-term reliability and wide application fields. The TAP475K025SRW capacitors are no exception. Examples of their usage can be found in military, aerospace, automotive, telecommunications, and medical industries.

TAP475K025SRW capacitors are low-ESR and low-profile, making them ideal for use in high-density, miniaturized circuit boards. They are constructed with solid tantalum cathodes and are typically rated for a working temperature range of -55°C to +125°C. The capacitance range for the TAP475K025SRW series is 4.7 μF to 680 μF.

The working principle of a tantalum capacitor is based on the classic capacitor design. It consists of two electrodes separated by a dielectric material. In the case of a tantalum capacitor, the anode is made of porous tantalum and the dielectric material is an electret film made of manganese dioxide, which is semi-permanent and dielectrically strong. This combination allows the tantalum capacitor to handle higher operating voltages than other types of capacitors.

Tantalum capacitors also offer several advantages over conventional aluminum electrolytic capacitors. These include smaller size and lighter weight, higher self-healing capability, lower leakage and higher thermal stability. As such, the TAP475K025SRW capacitors are favored for medical implantable, microprocessor controlled, and high-reliability consumer products.

Tantalum capacitors rely on the formation of an oxide layer on the surface of the tantalum particle. The oxidization process is reversible and ensures good adhesion and high mechanical strength. The remaining space between the particles is filled with an electrolyte, usually organic in origin. The electrolyte is usually ethylene glycol borate or ammonium pentaborate, and it acts as a dielectric, sustaining the current flow. Due to the great capacitance and low ESR of the TAP475K025SRW circuit board capacitors, they are suitable for high energy density applications such as bulk energy storage, pulsing, and filtering.

The process of forming the oxide layer on the tantalum particles is temperature and voltage sensitive. That is why the TAP475K025SRW capacitors are limited to a relatively low working voltage of 25V. Additionally, overvoltage may cause the electrolytic fluid to break down, leading to dielectric decomposition, thermal runaway, and eventual capacitor failure.

Tantalum capacitors are applicable for thousands of uses in today’s electronic industry. The versatility and high-performance of the TAP475K025SRW series make it a dependable and reliable choice for applications from cell phones to space vehicles.

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