KO-CAP® Polymer Electrolytic (COTS) Capacitor – T543 Series

KEMET's 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 multilayer ceramic, the high capacitance of aluminum 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 T543 COTS polymer electrolytic capacitor is an upscreened version of the industrial T520 KO-CAP. The T543's upscreened option includes surge current testing of 10 cycles at +25°C and 10 cycles at -55°C/+85°C. In addition to 100% tin (Sn) terminations, a tin-lead (SnPb) option is also available. The recommended application derating for these capacitors is 10% to 20%, rendering them suitable for application voltages from 2.25 V_DC to 50 V_DC.

Typical applications include DC/DC converters, switch mode and point of load power supplies, radar pulse capacitors, and telecommunications (mobile phone and base station). Other general applications include decoupling and filtering in applications requiring low ESR or a benign failure mode.