KEMET T591 Polymer Electrolytic Capacitors offer ultra low ESR and high capacitance in harsh environmental conditions where high temperature and humidity are a concern. The KEMET KO-CAP series has a long operational life and high reliability up to 500 hours with 85°C/85% RH load, and a stable performance afterwards. The T591 series has a conductive polymer cathode and combines the benefits of a low ESR multilayer ceramic with the volumetric efficiency of Tantalum and the high capacitance of aluminium electrolytic into one single surface mount capacitor.

Suitable applications for these polymer capacitors include decoupling and filtering in a range of different markets, but more specifically automotive applications such as input/output in DC-DC converters and infotainment.

Features and Benefits:
High reliability
Ultra low ESR
Polymer Technology
Improved capacitance retention at high frequencies
Operating temperature of -55°C to 125°C
Full compliance with AEC–Q200 Qualification Test Plan (T598)
Qualification plans based on AEC–Q200 with 85°C/85% RH load specification limited to 500 hours (T591)
Halogen-free epoxy/RoHS compliant