Tantalum Capacitors - Features in Operation

Capacitor is one of the mostcommon elements in any electronic circuit. Analogs for these elements have not yet been invented. They perfectly keep the charge and can give it away almost instantly. If an instantaneous discharge of 50 percent or more can damage the battery, then for a capacitor this is a normal operating mode. Powerful capacitor banks are used in substations as compensators for reactive power. They increase cos φ in operating enterprises and may well replace, suppose, a powerful generator, which is derived from work. Thus, powerful capacitor banks are involved in the manufacturing process itself. They improve the quality of the mains.

Эти изделия занимают достойное место и в electronics. With their help, almost all existing schemes are implemented. But, unfortunately, have samples and certain disadvantages. We are accustomed to consider the ideal capacitor, which is devoid of flaws and obeys certain laws in its work, which are easy to describe using mathematical formulas. In practice, everything happens differently. A leakage current appears - the main problem for many types of these devices.

With the development of data production technologyelements appeared tantalum capacitors. They are practically devoid of all the main disadvantages inherent in conventional counterparts. In terms of their parameters, they are as close as possible to the ideal capacitor.

• They have a very low leakage current, which allows them to be used in the design of highly accurate and critical circuits in electronics.
• Tantalum capacitors can work perfectly in a wide temperature (from - 80 to +125 ° C) and frequency range. However, their parameters do not change.
• Have a small series resistance and inductance.
• Small scattering coefficient and device impedance complement the overall positive picture.

However, like all elements and devices, tantalum capacitors have certain disadvantages. It is important to know about them when designing an electronic circuit.

• Tantalum capacitors are sensitive toexceeding the basic parameters in operation. In particular, it is not recommended to exceed (even briefly) the rated voltage for which this device is designed.
• The technology of their manufacture is rather complicated and consists of several stages. Even a small deviation from it or the use of low-quality raw materials lead to a change in the parameters of the product.
• The rather high cost of a capacitor is a direct way to the appreciation of the entire electronic circuit (this will certainly affect the estimate).

Also note that the labelingtantalum capacitors has its own characteristics. It practically does not differ from other devices. But this only applies to recent capacitors. “Old” capacitors are color-coded, which can be easily found on the Web. In addition, it must be borne in mind that smd tantalum capacitors are labeled using the alphanumeric string. If you are not a specialist in these devices - when buying, consult with the seller. The basic information above will allow you to ask meaningful questions.