The
paper film capacitor is made of
wax impregnated
paper. It has a
high dielectric constant and a high
pulse tolerance. The high
pulse tolerance means that
it can be
charged and
discharged quite rapidly without becoming
hot and
starting to
burn. But they are
large and more
expensive
than
plastic film capacitors.
Today the
paper film capacitor has been replaced in most
applications by the
plastic film capacitor, and is
now
most used in
noise filters, due to better characteristics
for this than the
plastic film capacitor.
Some capacitors have a combined
plastic and
paper dielectrics, and
are called
mixed dielectricum
capacitors. These have a
combination
of the
advantages of the two
types.