Cubic capacitor takes shape for modular DC link applications

Introducing a modular concept in power capacitors, the ModCap by TDK is cubic in design, rather than cylindrical and is designed for DC link applications.

The power capacitors are available for rated voltages of 1100 to 2300V and cover a capacitance range of 365 to 2525 micro Farad. Rated currents are between 105 and 180A and all capacitors are designed for 5kA recurrent pulse currents. The maximum permitted hot spot temperature is 90 degrees C.

The B25645A capacitor series is available in two versions of either 243 x 169.5 x 90mm or 258 x 215 x 115mm. The capacitors’ design means they can be fitted very close to IGBT modules, thus producing very short lead lengths. The lead length, and the capacitors’ low 14 nH self-inductance stops any substantial voltage overshooting at the IGBT modules when the current is shut off, explains TDK. Typically, no snubber capacitors are needed. The B25645A capacitor design also makes parallel connections of capacitors easy, continues the company. Typical applications are compact converters for traction, renewable energies and industrial applications.

The artificial resin-filled plastic housings comply with UL94 V-0. They also meet fire and smoke formation requirements, in line with IEC 61071, IEC 61881-1, EN 45545-2 HL3 R23, making the capacitors suitable for use in trains.

TDK manufactures electronic solutions for the smart society. It is based in Tokyo, Japan. It was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s comprehensive portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic and MEMS sensors.

TDK also provides power supplies and energy devices and magnetic heads. Products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda.

TDK focuses on automotive, industrial and consumer electronics, and information and communication technology markets.

The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.

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