B3271xHx Series Capacitors

TDK Corporation's B3271xHx series are EPCOS film capacitors for DC link applications that feature high energy and power density. The capacitors are rated for voltages from 500 V_DC to 1,600 V_DC, offer capacitance values from 0.47 µF to 170 µF, and are suitable for a maximum operating temperature of up to +105°C. At a rated voltage and operating temperature of +70°C, the typical life of the rugged, self-healing, and RoHS-compliant capacitors is 95,000 hours.

The capacitors are available in lead spacings of 27.5 mm, 37.5 mm, and 52.5 mm with both 2-pole and 4-pole versions. These options result in more than 90 combinations of configurations, providing high design flexibility. For the selection of the suitable DC link capacitor, TDK offers the tool CLARA.

The low self-inductances of only 11.5 nH to 23 nH combined with the high ripple current capability make these capacitors particularly well-suited for SiC-based inverters operating at high switching frequencies. The series is qualified to IEC 61071, AEC-Q200, and UL 810 and enables use in typical industrial applications such as frequency converters, photovoltaic inverters, EV fast chargers, and automotive applications such as onboard chargers and auxiliary and power inverters.