The RingCap is designed for rated voltages between 100 and 900VDC and offers capacitance values of 100-2000µF. Apart from the main winding, Y-capacitors with separate terminals can additionally be integrated in the winding. A special heat-treatment under vacuum increases long-term stability of the capacitor. In the standard version with dielectric made of PolyPropylene (PP) or PolyEthylene Terephthalate (PET), the capacitor is suitable for a temperature range from -40 to +105°C. With a dielectric made of PolyEthylene Naphthalate (PEN), it can even handle temperatures of up to +150°C.
Due to the low equivalent series inductance values ranging from less than 10 up to 30nH, no unwanted overvoltages occur in the DC link circuit during high-speed switching operations. For better protection against environmental effects, the capacitor is also available with a resin-filled housing.