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Low Capacitance Loss
Polypropylene is an extremely efficient dielectric. The losses (or heating effects) are mainly restricted to internal connections and electrode resistance.
The temperature rise is typically about 1°C. This means that higher ambient temperatures can be reached without the risk of thermal runaway.
Self Healing
The capacitor electrodes of a metallised polypropylene capacitor are thin layers of metal deposited on to the polypropylene under vacuum.
An isolated dielectric breakdown within the capacitor windings is “repaired” by vaporization of the metal deposits around the “fault” area. The capacitor remains unchanged except for an insignificant capacitance loss.
Impregnant Free
Metallised polypropylene capacitors have a low dissipation factor, good self healing properties, impregnant free construction and therefore no risk of impregnant leakage.
High Insulation Resistance
Some special applications demand high insulation resistance which can be satisfied with a metallised polypropylene capacitor.This means that the capacitor is capable of holding an electric charge for long periods. Resistance values are typically greater than 1000M.
Capacitor Cans
These cans are manufactured from flame retardant polyphenylene oxide (Noryl) compound.
Features include:
- Flame class rating UL 94 V1
- Guaranteed 1.5mm can wall thickness
- Internal ribbing for precise central positioning whilst maintaining a minimum of 2.0mm clearance around the winding
- State-of-the-art locking device for securing attachments to the can
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