The KEMET NEC-Tokin line of supercapacitors has 4 basic form factors: molded case, surface mount chip, can, and HVZ devices. When reviewing this chart from the left, first is the series defined, the output current defined, the maximum operating temperature and voltage defined. Also, the capacitance range by series is shown as well as the maximum ESR. ESR for supercapacitors is measured in Ohms. Advantages of the KEMET NEC/TOKIN line include lower ESRs and wider temperature ranges.