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ModCap™ Modular Capacitor Concept

2023-04-21 14:43:31

TDK EPCOS' ModCap is a modular capacitor concept for DC link applications. B25645A medium-frequency power capacitors are available for rated voltages of 1,100 V to 2,300 V and cover a 365 µF to 3,900 µF capacitance range. The rated currents between 105 A 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.

B25647A high-frequency power capacitors are available for rated voltages from 900 V to 1,600 V and cover a capacitance spectrum from 640 µF to 1,850 µF. Depending on the type, the rated currents range from 160 A to 210 A with a maximum permitted hot spot temperature of +90°C.

Due to the nonconventional design, the capacitors can be fitted very close to IGBT modules, thus producing very short lead lengths. The very low self-inductance prevents voltage overshooting on the power semiconductors 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.


  • Modular concept
  • Wide voltage range: 900 V to 2,300 V
  • Wide capacitance range: 365 µF to 3,900 µF maximum +90°C hotspot temperature
  • Qualified according to IEC 61071, IEC 61881-1, and EN 45545-2 HL3 R23 regarding fire and smoke formation
  • UL recognized
  • Compact converters for traction
  • Renewable energies
  • Industrial applications