The B25655J4307K*1 and B25655J4507K*5 power capacitors are characterized by a volume fill factor of nearly 1. According to the vendor they fit perfectly onto the IGBT modules thanks to their low-inductance busbars. This makes complex mounting unnecessary as well as the snubber capacitors and symmetry resistors usually required with other capacitor technologies.

The rated voltage of these PCCs is 450 V DC, their capacitances are 300 and 500 µF. They also feature an especially low ESL of no more than 15 and 25 nH, respectively. The ESR is a maximum of 1 m? for all types. The capacitors are designed for a temperature range of -40 °C to +110 °C and can also be briefly operated at 125 °C. Their average operating life is 15 000 hours. They are self-healing, meaning that breakdowns of the film at overload do not lead to short circuit or destruction of the capacitor. Despite their high performance, these DC-link circuit capacitors have dimensions of only 140 x 72 x 50 mm³ and 237 x 72 x 50 mm³, respectively.

Thanks to their great ruggedness and compact dimensions, capacitors in PCC technology are also well suited for highly space-saving converters and for inverters in photovoltaic installations. With rated voltages of up to 1250 V DC and integrated busbars, they are superior to other capacitor technologies in many applications.

Visit TDK-EPC at www.epcos.com