The difference between film capacitor and aluminum electronic capacitor

May 6,2016
Not interchangeable, electrolytic capacitor is not non-polarity capacitance.
Electrolytic capacitor:
1. Aluminum electrolytic capacitor: it is made the cathode aluminum cylinder, it is equipped with liquid electrolyte, inserted a crooked ribbon do the positive.Still need the dc voltage, do a layer of oxide film is formed on the piece of the anode for medium.Characterized by large capacity, but the leakage, poor stability, have positive and negative polarity, suitable for power filtering or low frequency circuits, when using, don't answer the the positive and negative. 
2. Tantalum niobium electrolytic capacitor: it made the anode, metal tantalum and niobium with dilute sulphuric acid liquor, such as the cathode, generated by surface of tantalum and niobium oxide film do medium is made.Its features are: small size, large capacity, stable performance, long service life.Insulation resistance.The temperature performance is good, used in equipment in high demand. 

Thin film capacitor:
Structure in the same paper condenser, medium is polyester or polystyrene.Polyester film capacitor, high dielectric constant, small volume, large capacity, good stability, suitable for the bypass capacitor.Polystyrene film capacitor, the dielectric loss of small, high insulation resistance, but the temperature coefficient is big, can be used in high frequency circuit. 

Polypropylene capacitor
Symbol: CBB
The electric capacity: 1000 p - 10 u
Rated voltage: 63-2000 - v
Performance and polystyrene is similar but small size, stability of slightly
Instead of most polystyrene or mica capacitor, the higher requirements for the circuit