T591 series are 500hours load humidity, standard construction polymer electrolytic organic capacitor (KO-CAP®). KEMET organic capacitor (KO-CAP) is a solid electrolytic capacitor with a conductive polymer cathode, capable of delivering very low ESR and improved capacitance retention at high frequencies. KO-CAP combines the low ESR of the multilayer ceramic, high capacitance of aluminium electrolytic and the volumetric efficiency of tantalum into a single surface mount package. Unlike liquid electrolyte based capacitors, KO-CAP has a very long operational life and high ripple current capabilities. The T591 capacitors deliver higher capacitance and ESR stability under harsh environmental conditions. Typical applications include decoupling and filtering in variety of market segments, with special emphasis in automotive applications such as infotainment, ADAS, chassis and safety, as well as power train, where harsh conditions, such as high humidity and temperature are a concern.