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This data describes fixed capacitors with plastic film dielectrics, also termed film capacitors or FK capacitors. 


Classification of film capacitors                                                                                                                                                            

1. Classification by dielectric                                                                                                                                                                      


Film capacitors have different characteristics and applications depending on the different type of dielectrics.

Abbreviations for structural types, in DIN41379, describe the medium and basic techniques & applications.


The last character of the abbreviation indicates the type of dielectric: 

T = Polyester (PET)

P = Polypropylene (PP)

N = Polyethylene naphthalate (PEN)

Prefix for M (=metallization), refers to the metallized structure of film capacitor.


Figure 1 Classification of film capacitors in DIN 41379 

*)  MFP and MFT capacitors are constructed using a combination of metal foils and metallized plastic films.  They are not covered by DIN41379. 

2. Classification by film and foil arrangements                                                                                                                                           


For a better understanding of the differences in the internal structure of capacitors, Figure 2 shows two typical laminated combinations of film and foil.


Figure 2   Examples of typical film and foil arrangements


Figure 3 shows the relationship between various film and foil, and the types of capacitors.


 3. Classification by construction                                                                                                                                                                

WINDAY FK capacitors are produced using either winding methods.


Wound technology    

In the general production process, capacitors are made up of individual cylindrical scroll, rolled by metallized film and foil, and then be covered with an insulating case or coating


Figure 4 Conventional production process in wound technology


In the MKT, MKP and MFP series, the types range we produce as following

Winding, Flattening, Insulation layer covering,

Or Potting into plastic shell, to save space,

And cylindrical winding capacitance.

The plane winding capacitor, which is installed in the cylindrical shell, has excellent characteristics.

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