152D396X9035R2B

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Tantalum capacitors are capacitors which utilizes tantalum, a chemical element, for its metallic electrodes. By using tantalum, these capacitors form a monolithic structure which has advantages over conventional capacitor types. A tantalum capacitor with a specific code of 152D396X9035R2B belongs to a class of “surface mount” capacitors, and has specific application fields and working principles.

The “152D396X9035R2B” code indicates that this capacitor is a 395volts, 10uF “dipped” surface mount tantalum capacitor. In general, tantalum capacitors are used for applications which benefit from their small size, long life, excellent frequency response and increased reliability. They are most suitable for use in critical circuits where reliability is of utmost importance. It is particularly suitable for high voltage dc-dc applications, such as in automotive electronics.

Tantalum capacitors are polarized, meaning one of their two terminals should not be connected to an opposing voltage terminal. This is because, unlike ceramic capacitors, a tantalum capacitor uses the same element for both its plates, and one of those plates needs to be biased. Polarizing the capacitor prevents it from becoming a short circuit when power is applied. The code 152D396X9035R2B reveals that this particular capacitor is both dipped and anode-negative, which means the negative lead should be connected to the lower voltage of the two supply voltages.

A tantalum capacitor uses a number of principles to work. It is known as a “solid state electrolytic”, because it has a solid dielectric rather than a liquid dielectric like conventional capacitors. The solid dielectric is typically an oxide of tantalum. It has a very small plate area and minimal space between it’s plates, which means that it has a very low equivalent series resistance (ESR). This is important for applications such as power supplies, as it significantly decreases the noise and ripple on the output voltage.

In addition to this, the surface mount tantalum 152D396X9035R2B capacitor is constructed in a way which maximizes its reliability. Its construction is composed of three layers: the tantalum anode, an electrolyte, and a double-sided metallized cathode. The anode and cathode are connected to the leads with a conductive epoxy, and the cathode is connected to the anode by an oxide passivation layer. This triple-layer protects the capacitor in many respects, including stability, reliability, and vibration resistance.

In conclusion, the 152D396X9035R2B surface mount tantalum capacitor is a great choice for many applications due to its size, long life, excellent frequency response and increased reliability. Its solid dielectric, low ESR and multiple layers in construction helps make it highly reliable and useful in power applications. All of these properties make this type of tantalum capacitor suitable for applications such as automotive electronics and high voltage DC-DC circuits.

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