300 F at 2.7 V — sizing for hold-up and pulse loads
The SCCY62V307VSB is a 300 F supercapacitor from KYOCERA AVX's SCC series, rated at 2.7 V. That capacitance stores about 1.1 kJ at full voltage — enough to bridge a 100 ms power gap at 10 A or supply a 50 W pulse for a couple of seconds. The -5%, +25% tolerance is typical for carbon-based supercaps; the wide positive side means a series stack needs voltage balancing to keep each cell below its 2.7 V ceiling. The radial can measures 35 mm diameter by 64 mm seated height, with solder lug terminals on 22.5 mm lead spacing. Through-hole mounting with the lugs lets it carry the high peak currents without a PCB trace bottleneck — the lugs take a wire or bus bar directly.
Lifetime and thermal derating
Rated lifetime is 1000 hours at 60°C. Supercapacitor aging follows an Arrhenius model — every 10°C drop roughly doubles the life, so at 45°C you can expect around 4000 hours, and at 25°C the useful life extends well beyond the rated figure. The operating range is -40°C to 65°C, which covers industrial enclosures and outdoor cabinets but not engine-bay temperatures.