Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Tantalum Capacitors

Tantalum capacitors are specialized electronic components used in a variety of applications. They are constructed using a tantalum-oxide dielectric between their plates and are used mainly in pulsed-power and high-frequency applications. Fully encapsulated versions for military and aerospace applications are also available.

The designation "199D156X9016CXV1E3" is an identification code of a particular tantalum capacitor, with each letter and number representing a specific characteristic. For example, the first three digits (199) represent the capacitance value range in microfarads (µF). The next three digits (156) indicate the voltage rating, in volts (V). The next string (9016) is the series name, which can be used to identify the part from other product lines. And the last two digits (CX) denote the tolerance, which indicates the maximum tolerance of the capacitance value - for the 199D156X9016CXV1E3, it would be +/-15%.

Application Field

Tantalum capacitors are widely used where a small size, light weight, and high reliability capacitors are required. They are particularly suitable in mobile applications, such as in PDAs, handhelds, laptop computers, and cell phones, thanks to their very low leakage characteristics as well as their stability over a wide temperature range.

They are also widely used in automotive, medical devices, consumer electronics, aerospace, and military applications, due to their low current leakage characteristics and ability to maintain stable performance even in harsh environments. In addition, in applications where voltage spikes can occur, tantalum capacitors can minimize or even eliminate damage to circuit components due to their high ripple current-handling capability at 125℃.

Working Principle

Tantalum capacitors are constructed using tantalum-oxide as a dielectric. The amount of the dielectric material depends on the size of the capacitor and the desired capacitance value, as the size of the dielectric is what dictates the capacitor\'s capacitance. While typical dielectrics are generally composed of an insulating oxide, the oxide used in tantalum capacitors is in fact an ionic conductor.

When voltages are applied across the capacitor\'s terminals, the oxide starts to conduct. This occurs when anions from one plate are attracted to cations on the opposite plate, allowing electrons to move from one plate to the other and thus forming a conducting path. The more voltage is applied, the higher the number of anions and cations that are attracted by their opposite counterparts and thus the higher conductivity that is achieved.

This is why higher amounts of voltage tend to increase the capacitance of the device. This phenomenon is known as "intrinsic capacitance", and its value is much higher than the value of the capacitance generated from the size of the dielectric material. Because of this, actual capacitance values are usually much higher than the minimum capacitance of the device stated in its specs.

The volumetric efficiency of tantalum capacitors is also much greater than that of other types of capacitors, meaning more capacitance can be provided per unit of volume. This is an advantage for applications where high capacitance is needed, such as in high-current power supply applications.

Conclusion

Tantalum capacitors are widely used in electronic applications due to their small size, light weight, and high reliability. They are ideal for use in mobile and automotive applications thanks to their low leakage, stability, and high ripple current-handling capability. The designation “199D156X9016CXV1E3” identifies a particular tantalum capacitor. The first three digits (199) indicate the capacitance range in microfarads (µF), and the last two digits (CX) represent the tolerance, which indicates the maximum tolerance of the capacitance value.

The specific data is subject to PDF, and the above content is for reference