Capacitors for Electronic Equipment
Capacitors for Electronic Equipment
Capacitors for Electronic Equipment
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WIMA <strong>Capacitors</strong><br />
in PCM 5 mm<br />
deflection circuits, oscillator circuits and<br />
audio equipment. WIMA Polypropylene<br />
capacitors in PCM 5 mm can also be<br />
supplied in film/foil versions <strong>for</strong> high pulses<br />
with rated voltages up to 1000 VDC.<br />
In the case of metallized capacitors, thin<br />
layers of aluminium (approx. 0.03 mm) are<br />
vacuum-deposited on the insulating film<br />
as conducting electrodes. In the case of a<br />
breakdown, the short circuit current causes<br />
the thin metal coating to evaporate around<br />
the point of failure and an insulating area<br />
is <strong>for</strong>med. The capacitor remains intact<br />
(self-healing). Due to their construction<br />
principle metallized capacitors stand out<br />
<strong>for</strong> their very favourable capacitance/volume<br />
ratio.<br />
The film/foil construction is mainly used<br />
<strong>for</strong> capacitors with smaller capacitance<br />
value. The advantage of this construction<br />
principle is the easy contactability of the<br />
metal foil electrodes and the good pulse<br />
strength. To avoid breakdowns caused by<br />
weak spots in the dielectric, the insulating<br />
film chosen is always thicker than theoretically<br />
required by the values which are<br />
determined from the specific breakdown<br />
strength of the material.<br />
WIMA FKS 2<br />
WIMA FKP 2<br />
WIMA MKS 2<br />
WIMA MKP 2<br />
WIMA capacitors in PCM 5 mm are<br />
available in two dielectric versions as<br />
metallized or film and foil capacitors.<br />
WIMA capacitors with a Polyester dielectric<br />
(PET) are suitable <strong>for</strong> general<br />
applications such as coupling, decoupling<br />
and by-passing. By making use of ultra<br />
thin film and appropriate manufacturing<br />
experience, it has been possible to achieve<br />
high capacitance values in very small box<br />
sizes. The WIMA MKS 2 <strong>for</strong> example is<br />
available with capacitance values up to<br />
10 mF in PCM 5 mm.<br />
WIMA capacitors are produced with the<br />
proven box technology using solvent-resistant,<br />
flame-retardant plastic cases according<br />
to UL 94 V-0. They are environmentally<br />
compatible with the RoHS 2011/65/EC<br />
regulations of the European Union.<br />
Polypropylene capacitors (PP) are used in<br />
the high frequency field. This includes<br />
resonant circuits, power supplies,<br />
11.12<br />
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