Capacitors for automotive extremes

August 07, 2015 // By Graham Prophet
Kemet has developed what it positions as the first AEC-Q200 qualified polymer electrolytic capacitor; the component offers stability and endurance in extreme humidity and temperature environments

T598 high humidity/high temperature series polymer electrolytic capacitors meet all of the requirements of the Automotive Electronics Council’s AEC-Q200 specification for passive components. Improvements over the prior T591 Series result in a design that exceeds the humidity bias testing requirements of 85°C with 85% relative humidity in addition to delivering stable electrical performance at 125°C.

The T598 Series is available in capacitances of up to 330 µF and rated voltages up to 16V. The qualification test plan is in accordance with AEC-Q200 and these products are manufactured in an ISO TS 16949 certified facility. This series is available for Production Part Approval Process (PPAP), Part Submission Warrant (PSW) and Change Control Notification.

Typical applications include decoupling and filtering of DC-to-DC converters in automotive infotainment and advanced driver assistance, as well as industrial and telecom applications where harsh conditions such as high humidity and temperature are of concern.

Dr. Philip Lessner, Kemet Senior Vice President and Chief Technology Officer comments, “...designers have utilized polymer electrolytic capacitors in space-constrained or high performance applications. Now that KO-CAPs meet all of the AEC-Q200 requirements, engineers can incorporate these innovative capacitors into automotive and other harsh environment applications.”


For information about ESR and capacitance performance across rated temperature and voltage, models are available in Kemet’s WebSPICE at