Wima DC-Link Intermediate Circuit Capacitors

Based on their internal construction and their non-polarized connection configuration WIMA DC-LINK HC capacitors can be connected in three different switching options. One individual capacitor can for example be connected as one 4500 µF/400 VDC, as two 2250 µF/400VDC or alternatively as one 1125 µF/800 VDC component. The capacitors are wound with a metallized polypropylene film and boxed in a plastic encapsulation sealed with self-extinguishing epoxy resin. Depending on the case size values between 85 µF/1600 VDC and 4500 µF/400 VDC are available. The new WIMA DC-LINK HC range is used in intermediate circuit applications of power electronics, e.g. converters, and stands out by its high rated voltage per component, low dissipation factor (ESR) and very high insulation resistance. In case of breakdown the capacitors self-heal entirely and exhibit a high life time expectation. In DC intermediate circuits with increased voltages and/or switching frequencies of the inverter they more and more replace the electrolytic capacitors so far used. Moreover, due to the high ESR of electrolytics the AC current load at high frequencies leads to an enormous dissipation / self-heating which considerably limits the permissible current carrying capacity as well as the life time expectation.

• Very high capacitance/volume ratio
• High voltage rating per component
• Very low dissipation factor (ESR)
• Very high insulation resistance
• Excellent self-healing properties
• Long life expectancy
• Non-polar construction
• Particularly reliable contact configuration
• High shock and vibration resistance
• Outstanding mechanical stability

WIMA DC-LINK MKP 3 capacitors in cylindrical case with screw fixing are available with capacitances from 35 µF through 200 µF and with voltage ranges from 700 VDC through 1500 VDC. They can be provided with male or female terminations.

WIMA DC-LINK MKP 4 capacitors with rectangular case are available with capacitance values from 2 µF through 150 µF and with rated voltages from 600 VDC through 1300 VDC. For mounting purposes 2-pin and 4-pin versions are possible. The WIMA DC-LINK MKP 4S series has been designed for stringent requirements.

WIMA DC-LINK MKP 5 capacitors in cylindrical plastic case are available with capacitances from 16 µF through 260 µF and with rated voltages of 500 VDC, 700 VDC, 900 VDC, 1100 VDC and 1300 VDC. They are provided with tinned wire terminations for PCB mounting.

WIMA DC-LINK MKP 6 capacitors have a cylindrical aluminium case. They are available with capacitances from 75 µF through 4920 µF and with rated voltages of 600 VDC, 700 VDC, 900 VDC, 1100 VDC, 1300 VDC and 1500 VDC. For bus bar mounting they are designed with M6 screw terminations and M12 screw bolt.

Customized solutions e.g. can be realized with WIMA DC-LINK HC and WIMA DC-LINK HY with variable connecting configurations.