KEMET T599 KO-CAP™ Series

KEMET T599 KO-CAP™ automotive qualified polymer electrolytic capacitor

KEMET has introduced its first 150°C Automotive KO-CAP capacitor

KEMET T599 KO-CAP™ Series Automotive Qualified Polymer Electrolytic Capacitors

KEMET introduced its first 150°C Automotive KO-CAP capacitor. The T599 KO-CAP High Humidity/High Temperature Performance Polymer series delivers stability and endurance under harsh humidity and temperature conditions.

Building on the success of the T598 series, KEMET further refined the design, materials and manufacturing to ensure T599 delivers higher stability and endurance under harsh conditions. T599 capacitors pass 1,000 hours of humidity bias testing under 85°C with 85% relative humidity at rated voltage, and endurance testing at 150°C up to 1,000 hours, rendering it the only 150°C AEC-Q200 qualified polymer electrolytic capacitor available today.
"Since 2015, T598 capacitors have offered engineers a breakthrough in high capacitance, low ESR and long lifetime with full AEC-Q200 qualification," said Dr. Philip Lessner, KEMET Senior Vice President and Chief Technology Officer. "Over the last two years, designers have utilized polymer electrolytic capacitors in space-constrained or high-performance applications. Now that KO-CAPs meet both 150°C and AEC-Q200 guidelines, automotive engineers can incorporate these innovative devices into powertrain designs."
Qualification is compliant with AEC-Q200 guidelines and parts are manufactured in an ISO TS 16949 certified plant. T599 is also available for Production Part Approval Process (PPAP), Part Submission Warrant (PSW) and change control notification.



  • Ultra low ESR
  • Full compliance with AEC–Q200 qualification test plan (T598 125°C, T599 150°C)
  • Qualification plan based on AEC–Q200 with 85°C/85% RH load specification limited to 500 hours (T591)
  • TS 16949 certified plant
  • Subject to PPAP/PSW and change control
  • Meets or exceeds EIA standard 535BAAC
  • Taped and reeled per EIA 481
  • Halogen-free, epoxy and RoHS compliant



  • Typical applications include decoupling and filtering in a variety of market segments, with special emphasis in automotive applications such as infotainment, ADAS, chassis and safety, as well as powertrain, where harsh conditions, such as high humidity and temperature, are a concern

KEMET T599 KO-CAP Automotive Capacitors | Avnet Abacus

Display portlet menu


Contact our product specialists

Ask an expert

Have a question? Our regional technical specialists are on hand to help.

Related documents

Subscribe to our Newsletters

Researching technology for your next application design? We can help you get project ready. Get the latest design tools and solutions, Engineers' Insight and Focus magazine sent straight to your inbox.