| FILM CAPACITOR GUIDE |
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Application / Function Desired |
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Expected Capacitor Parameter |
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Circuit Diagram |
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| FILTERING AND FREQUENCY DISCRIMINATION |
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| Capacitor filter network designed for the frequency band FL - FH. |
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Stability of electrical characteristics.
Low dissipation factor.
Close capacitance tolerance. |
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DEKI RANGE
For C £ 0.047 mf — Plain Polypropylene Film Capacitors.
For C > 0.047 mf — Metallised Polypropylene Film Capacitors.
PEP Film Foil Inductive for high temperature upto 110°C with high voltage and high frequency say 40kHz and 110 VRMS. |
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| TEMPERATURE COMPENSATION |
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| Circuit design utilises change of capacitance with temperature |
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Linear temperature coefficient.
Stability of electrical values. |
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DEKI RANGE
For C £ 0.047 mf — Plain Polypropylene Film Capacitors.
For C > 0.047 mf — Metallised Polypropylene Film Capacitors.
PEP Film Foil Inductive for high temperature upto 110°C with high voltage and high frequency say 40kHz and 110 VRMS. |
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| INTERFERENCE SUPPRESSION |
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| Capacitors are connected across the mains input to supress the interference generated by appliances or in the mains. |
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Should be able to handle high transient pulses.
High reliability against active and passive flammability. |
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DEKI RANGE
Interference Suppression Capacitors. |
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| VOLTAGE DROPPER |
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| Capacitors are connected in series to drop the input voltage. Used mainly in electronic energy meters and fan regulators. |
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Low loss factor.
Good reliability.
Flame retardant. |
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DEKI RANGE
For rated voltage less than 250V AC — Interference Suppression Capacitors.
For rated voltage more than 250V AC — Metallised Polypropylene Film Capacitors for AC Application.
For rated voltage less than 220V AC and higher capacitance — Metallised Polyester Film Capaciors. |
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| TV FLY-BACK TUNING |
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Low dissipation factor.
High dielectric strength.
High pulse rise time rating. |
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DEKI RANGE
For good dv/dt rating — AC & Pulse Metallised Polypropylene Film Capacitors (MPP / MPP Series).
For very high dv/dt rating — AC & Pulse Metallised Polypropylene Film Capacitors (PP / MPP Series). |
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