EKT Series Low ESR Chip Tantalum Capacitors

  1. EKT SERIES Low ESR Chip Tantalum Capacitors (PDF: 203KB) ↓ Download

Kingtronics EKT Series Low ESR (Low Equivalent Series Resistance) surface mount tantalum capacitors are specifically designed for those applications such as POWER SUPPLIES requiring the highest level of robustness available to tantalum capacitor technology. These devices have inherently low ESR due to special manufacturing process and powder technology improvements. They are capable of handling higher ripple currents than standard product. The benefits of using Kingtronics EKT Series components are its capability to handle higher ripple currents producing lower ripple voltage output and less power dissipation resulting in less heating.

Kingtronics Tantalum and Ceramic Capacitors Cross Reference Guide ↓ Download

Kingtronics Tantalum and Multilayer Ceramic Capacitors Full List

About Tantalum Capacitors

Tantalum Capacitors are used in electronic devices including portable telephones, pagers, personal computers, and automotive electronics. When selecting between available tantalum capacitors, there are a number of key specifications to keep in mind when designing in a tantalum capacitor. These include capacitance value, capacitance tolerance, dissipation factor, leakage current, and equivalent series resistance (ESR). The designer must also consider the board interface requirements. Tecate tantalum capacitors are available in radial leaded or surface mount configurations.

Capacitance is a measure of the energy storage ability of a tantalum capacitor, given as C = K A/D, where A is the area of the electrodes, D is their separation, and K is a function of the dielectric between the electrodes. The formula yields a result in farads (F), but a farad is so large that the most commonly used values are expressed in microfarads (uF = 10-6F).

The dissipation factor (DF) is the ratio between the resistive and the reactive part of the impedance of the tantalum capacitor submitted to a sinusoidal voltage of specified frequency. It is a measure of the losses in the capacitor.

Leakage current is measured as the current flowing from one conductor to an adjacent conductor through an insulating layer. The leakage current in tantalum capacitors is measured after 3 minutes at 25°C, through a 1k resistor connected in series with the capacitor, and with rated voltage applied.

Equivalent series resistance (ESR) represents the extent to which the capacitor acts like a resistor when charging and discharging. This functions via a resistive element within the capacitor model, found in both the AC and DC domains. The lower the ESR the higher the current carrying ability of the tantalum capacitor.

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