Semikron PK16 capacitor

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The PK16 capacitor can be universally used for assembling low-inductance DC buffer circuits and DC filters. With its high energy density it can replace banks of series-connected electrolytic capacitors as well as large film capacitors in rectangular cases.

The capacitance in a DC buffer circuit must be sufficiently sized to both handle and smooth the ripple currents. The traditional use of series-/parallel-connected capacitors offered large capacitance at seemingly low cost; however, the low cost per microfarad is countered by the very low current strength, the high sensitivity to voltage and current surges, as well as high risk of failures, resulting in high maintenance cost.

Electronicon has developed the range with high capacitance density. With five times the current strength of conventional electrolytic capacitors, it is not necessary to reproduce the same capacitance in film technology.

Advantages include: good voltage and current strength; increase in operational life; reduction of failures; minimisation of power dissipation losses; reduction of self-inductance and series resistance; more exact manufacturing tolerances; elimination of sharing resistors.

Its compact cylindrical aluminium or plastic can design makes the capacitor suitable for both the electrical and mechanical requirements of high-speed IGBT converters. Its robust terminals and the robust fixing stud allow simple and reliable mounting that unites lowest inductance and highest current strength.

The large clearance and creepage distances make this design suitable for a wide range of operating voltages.