Suntan Blog

Most types of capacitor include a dielectric spacer, which increases their capacitance. These dielectrics are most often insulators. However, low capacitance devices are available with a vacuum between their plates, which allows extremely high voltage operation and low losses. Variable capacitors with their plates open to the atmosphere were commonly used in radio tuning circuits. Later designs use polymer foil dielectric between the moving and stationary plates, with no significant air space between them.

In order to maximise the charge that a capacitor can hold, the dielectric material needs to have as high a permittivity as possible, while also having as high a breakdown voltage as possible.

Suntan X2 Metallized Polyester Film Capacitors are an excellent choice for a wide range of electrical applications. One of the most important features of a quality film capacitor is the purity of the film. Every X2 capacitor is manufactured with high purity DuPont film, to insure a higher level of performance when compared to our competitors. Most of our competitors are using a low grade of Chinese film in their metallized polyester caps. Great care is taken during the manufacturing process to insure tight winding of the foil to prevent microphonic distortion and tight tolerances. These X2 metallized polyester film caps are perfect for crossover networks and are a higher quality alternative to non polar caps.

Suntan X2 Metallized Polyester Film Capacitors are Lead Free (RoHS Compliant) and available in many stocked and un-stocked values.

When measured at room temperature (25°C ± 5°C) and at a frequency of 0.1 to 1 Megahertz, the minimum capacitance shall not be greater than that specified at minimum setting  with a +10% tolerance and the maximum capacitance shall not be less than that specified maximum setting with a - 10% tolerance.

The capacitance drift shall be determined as the greatest difference between any two of the three 25°C measurements obtained during the temperature characteristic test.  The capacitance drift shall not exceed 0.75% or 0.5pF, whichever is greater.