T491A334M035AT2478

Series:	T491
Packaging:	Tape & Reel (TR)
Part Status:	Active
Capacitance:	0.33µF
Tolerance:	±20%
Voltage - Rated:	35V
Type:	Molded
ESR (Equivalent Series Resistance):	15 Ohm
Operating Temperature:	-55°C ~ 125°C
Lifetime @ Temp.:	2000 Hrs @ 125°C
Mounting Type:	Surface Mount
Package / Case:	1206 (3216 Metric)
Size / Dimension:	0.126" L x 0.063" W (3.20mm x 1.60mm)
Height - Seated (Max):	0.071" (1.80mm)
Lead Spacing:	--
Manufacturer Size Code:	A
Ratings:	--
Features:	General Purpose
Failure Rate:	--

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Tantalum Capacitors

T491A334M035AT2478 is a type of capacitor, specifically, a tantalum capacitor. This capacitor is designed with a tantalum-based anode, a cathode made of two layers of lower ruthenium oxide, and an electrolyte, usually manganese dioxide, between the two. It is commonly used in a variety of electronic circuits and is particularly convenient for low voltage applications due to its small size and ability to be surface-mounted.The main use for tantalum capacitors is in circuit design, as these capacitors are able to provide a wide variety of functions and can be used to serve multiple purposes in a given circuit. For instance, they are commonly used in applications such as power supply filtering, bypass switching and signal filtering. To put it simply, they are used to store and release energy, controlling the amount of current that flows through a circuit in order to improve the performance and reduce noise.The working principle of a T491A334M035AT2478 tantalum capacitor is based on the capacitance of the device. Capacitance is a measure of a capacitor’s ability to store electrical charge and ultimately determine its conductivity. A basic understanding of capacitance is that it is equal to the sum of the charge stored on the two plates or electrodes of the capacitor, divided by the voltage applied to the device. In terms of energy storage, when voltage is applied to the capacitor (aka charging the device) electrons are pulled from the anode and held by the cathode, storing the energy. When voltage is insufficient, the capacitor will discharge, releasing the energy back into the circuit again. This process can be used in a variety of ways, from storing energy from a battery in order to smooth out power delivery, to providing the necessary spark voltage for ignition systems. The most common use of T491A334M035AT2478 tantalum capacitors is in power supply filtering and bypass circuits, where they can be used to provide an additional barrier in order to reduce the effects of noise or ripple voltages. The capacitor can also be used to act as a buffer between two sections of a circuit, filtering out any unwanted frequencies that could disrupt the performance. Along with the many uses of tantalum capacitors, they come with a few drawbacks. The main problem is their inherent instability, especially when exposed to heat. As they age, they may start to form metal oxides on the surface which effectively decreases their capacitance. Additionally, when exposed to high temperatures – typically temperatures over 200 degrees Celsius – tantalum capacitors are known to suffer from thermal runaway, where the heat generated by the device increases exponentially and ultimately leads to the failure of the capacitor. Despite these drawbacks, T491A334M035AT2478 tantalum capacitors remain one of the most widely used components in electronic circuit design due to their small size, ease of use, and their reliability in low voltage applications.

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