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Technical Information:
Basic Technical Data for Capacitors
Construction of Plastic Film Capacitors 
Dielectric 
Special Technical Subjects 


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Polypropylene

Basic Molecule

Typical Graphs

 

Capacitance change versus temperature

(f = 1 kHz) ( general guide)

  Insulation resistance change versus temperature (general guide)

 

Max. working temperature: +100°C

Film thickness: > 4 µm

Production process: extruded, biaxially stretched

  Dissipation factor change versus frequency
(general guide)
 
 
Manufacturing Process for Polypropylene Film
 
- Extrusion
- Bi-axial stretching
- Crystallisation
tangled felted stretched crystallised (cross-linked, knotted)
   

Fields of Applications for Polypropylene Capacitors

 

Sample and hold
Oscillator circuits
Resonating circuits
Deflection systems
Power supplies
Converters
Lighting
Audio applications

 

Properties

 

Lowest dissipation factor
Constantly negative TKc
Close tolerances up to 1%