Passives

Conductive capacitors built with advanced materials

9th November 2016
Alice Matthews
0

Six families of surface mount and through-hole conductive polymer aluminum solid electrolytic capacitors have been announced by KEMET, with voltage ratings up to 250VDC. Leveraging KEMET’s high-conductivity polymer, the devices have low Equivalent Series Resistance (ESR) resulting in low self-heating and high ripple-current capability.

The high ripple current capability allows these devices to replace arrays of multiple conventional electrolytic capacitors connected in parallel, thereby enabling designers to save PCB real estate. In addition, the families deliver enhanced reliability by giving ten-times longer life for every 20°C reduction in operating temperature. The company states that conventional capacitors give only double the lifetime for every 10°C reduction, according to conventional guidelines.

The through-hole devices cover capacitance values from 2.2-1,500 microfarads, in four families that give designers a choice of properties including 2.5–250VDC operating voltage range, extended lifetime of up to 5,000 hours, and -55°C to 125°C specified-temperature range.

The surface-mount families feature operating voltage up to 50VDC, specified-temperature range of -55°C to 105°C, rated lifetime of 2,000 hours, and capacitance values between 10-2,700 microfarads.

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