Dielectric | Polyester, Polyethylene terephthalate (PET) |
Conductor | Aluminium |
Advantages | Good pulse handling capability, little moisture-dependent, solvent-stable, high insulation resistance, high dielectric strength, small dimensions, very good self-healing performance |
Disadvantages | temperature dependence is large and non-linear large dissipation factor, 0.5% at 1 kHz audible distortion in hi-fi applications |
Applications | General applications, HF switch mode power supplies, operation up to 125°C |
Dielectric | Polycarbonate |
Conductor | Aluminium |
Advantages | low temperature influence, small dimensions, good long-term stability |
Disadvantages | Not suiteable for High Frequency |
Applications | Suitable for Audio Frequency, automotive electronics, operation up to 100°C |
Dielectric | Cellulose Acetate (Synthetic Resin) |
Conductor | various |
Advantages | medium loss factor, self-healing, particularly high overload capacity, small dimensions |
Disadvantages | Not suitable for surge discharge circuits, dielectric breakdown of 63 V |
Applications | General purpose |
Dielectric | Polystyrene, Polyethylene terephthalate |
Conductor | Aluminium |
Advantages | extremely low loss, and excellent electrical characteristics, specifically capacitance change over temperature, which is typically +-1% over the temperature range of -55 to 85°C |
Disadvantages | very low dielectric constant (k) of 2.1, only small values available ! |
Applications | Resonant Circuits, Bypass, Timing, DC-Block |
Dielectric | Polypropylene |
Conductor | Aluminium |
Advantages | high pulse handling capability, high voltages up to 2000 V, low moisture absorption, low loss factors, and capacitance stability throughout the temperature range |
Disadvantages | temperature sensitive above 85 °C |
Applications | Resonant Circuits, For critical electrical conditions |