Suntan Introduces Four Kinds of Plastic Film Capacitors
May 10, 2013 | tags Capacitor Metallized Polypropylene Film Capacitor X2 cap Cross reference | views
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Suntan Technology Company Limited
---All Kinds of Capacitors
Since 1978, Suntan Technology Company Limited started in selling all kinds of capacitors from our headquarters in Hong Kong. And the capacitor can be divided into nine types of PET film capacitor, Kapton Capacitor, Polystyrene Capacitor, Polycarbonate Plastic Film Capacitor. But very few people know their respective media, features and shortcoming. So Suntan introduces four kinds of different plastic film capacitor to our customers.
| Capacitor type | Dielectric used | Features/applications | Disadvantages |
|---|---|---|---|
| PET film Capacitor | Polyester film | Smaller in size when compared to paper or polypropylene capacitors of comparable specifications. May use plates of foil, metalized film, or a combination. PET film capacitors have almost completely replaced paper capacitors for most DC electronic applications. Operating voltages up to 60,000VDC and operating temperatures up to 125°C. Low moisture absorption. | Temperature stability is poorer than paper capacitors. Usable at low (AC power) frequencies, but inappropriate for RF applications due to excessive dielectric heating. |
| Kapton Capacitor | Kapton polyimide film | Similar to PET film, but significantly higher operating temperature (up to 250°C). | Higher cost than PET. Temperature stability is poorer than paper capacitors. Usable at low (AC power) frequencies, but inappropriate for RF applications due to excessive dielectric heating. |
| Polystyrene Capacitor | Polystyrene | Excellent general purpose plastic film capacitor. Excellent stability, low moisture pick-up and a slightly negative temperature coefficient that can be used to match the positive temperature co-efficient of other components. Ideal for low power RF and precision analog applications | Maximum operating temperature is limited to about +85°C. Comparatively bigger in size. |
| Polycarbonate Plastic Film Capacitor | Polycarbonate | Superior insulation resistance, dissipation factor, and dielectric absorption versus polystyrene capacitors. Moisture pick-up is less, with about +/- 80 ppm temperature co-efficient. Can use full operating voltage across entire temperature range (-55°C to 125°C) | Maximum operating temperature limited to about 125°C. |
