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Melinex film can be interleaved with paper. The material is then silvered. It is the rolled to form capacitor. High voltage capacitors are sealed to avoid corona. These capacitors can withstand higher voltages but are temperature sensitive.
Specifications
Range of values up to few μf
Operating voltages 300 to 400 volts r.m.s
Power factor at 1 KHz 1.9% and 250C
Temperature coefficient -8% to + 20% for
Of capacitance -60 to + 1600C
Applications: These capacitors can work at higher voltage and can work at higher temperatures (1300C). But losses are more.
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