ModCap is a modular capacitor concept for dc link applications. The newly developed power capacitors are available for rated voltages of 1,100 to 2,300 V and cover a 365 to 2,525 µF capacitance range. The rated currents between 105 and 180 A are type-conditioned with all types designed for 5-kA recurrent pulse currents. The maximum permitted hot spot temperature is 90°C.
In contrast to conventional cylindrical designs, the B25645A capacitor series is cubic in design 
and available in two versions of either 243×169.5×90 mm or 258x215x115 mm. Due to this design, the capacitors can sit close to IGBT modules, thus producing short lead lengths. This, combined with a low 14-nH capacitor self-inductance, stops any substantial voltage overshooting at the IGBT modules when the current is shut off. As a result, generally no snubber capacitors are needed. This design also makes parallel connections of capacitors easy. Typical applications are compact converters for traction, renewable energies and industrial applications.
The artificial resin-filled plastic housings comply with UL94 V-0. In addition, the fire and smoke formation requirements, in line with IEC 61071, IEC 61881-1, EN 45545-2 HL3 R23, are met. This makes these capacitors well suited for use in trains.
Fields of application include compact converters for traction, renewable energies, and industrial applications.
TDK Corp., 475 Half Day Road Suite 300, Lincolnshire, IL 60069, 847-699-2299, Fax: 1-847-803-6296, www.tdk-electronics.tdk.com/pec
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