Capacitors for Electronic Equipment

WIMA Radio Interference
Suppression Capacitors for
Overvoltage Protection
WIMA MKP-X2
WIMA MKP-X2 R
WIMA MKP-Y2
WIMA MP 3-X2
WIMA MP 3-X1
WIMA MP 3-Y2
WIMA MP 3R-Y2
Depending on the application, radio
interference suppression capacitors remain
on the mains for an uninterrupted period
of 10, 20 or more years. They need not
only satisfy EMC requirements in suppressing
outgoing interference from an application
but they also have to protect the
application from incoming power surges.
Hence careful selection of these components
is essential.
The special feature of WIMA Polypropylene
RFI capacitors are the high capacitance
values at smaller case sizes compared
to metallized paper capacitors,
being available with capacitances from
1000 pF through 10 mF at AC voltages of
275 VAC, 300 VAC and 400 VAC for
class X2 and Y2. Based on the dielectric
used they are highly cost-effective.
WIMA metallized paper capacitors are
neither actively nor passively flammable.
The components are resin impregnated
under vacuum and encapsulated with
self-extinguishing cast resin. Thanks to the
good oxidation behaviour of the paper
dielectric, they have outstanding selfhealing
properties even with high energy
pulses. The capacitors are specified for
temperatures up to 110) C and are available
for class X1, X2 and Y2 applications.
Class X capacitors are connected between
phase and neutral or phase and phase
conductors. Class Y capacitors have
an increased degree of electrical and
mechanical safety and are connected, for
example, between phase conductors and
earthed casing, and thus by-pass operating
insulation.
WIMA RFI capacitors with metallized
paper dielectric are available with capacitances
from 1000 pF through 1.0 mF and
voltage ratings of 250 VAC, 275 VAC,
300 VAC, 440 VAC and 500 VAC.
The specified rated AC voltage takes into
account a rise of the mains voltage of
up to 10 % above the nominal value, in
accordance with IEC 60384-14.
The components are environmentally
compatible with the RoHS 2011/65/EC
regulations of the European Union.
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