330 mF backup cap for 8.1 V rails
The KYOCERA AVX SCMR14J334SRBB0 is a 330 mF supercapacitor from the SCM series, rated at 8.1 V with a -10% to +30% capacitance tolerance. It comes in a through-hole radial can package with PC pin termination and a 13.50 mm lead spacing. The 500 mOhm ESR at 1 kHz governs the charge/discharge efficiency — a lower ESR means less heat generation during high-current pulses, which matters when this cap is used for peak-power buffering or short-duration backup in industrial electronics.
ESR and lifetime at 65°C
Rated for 1000 hours at 65°C, this supercapacitor's operational life is temperature-sensitive — every 10°C drop roughly doubles the expected life, so a 45°C ambient extends endurance well beyond the rated figure. The 500 mOhm ESR at 1 kHz sets the self-heating under ripple current — for a 1 A RMS ripple, the internal dissipation is 0.5 W, which must be accounted for in the thermal design of the enclosure.