470 mF, 5.5 V — the energy buffer for backup and peak-power events
The KYOCERA AVX SCMR14F474PSBA0 is a 470 mF supercapacitor from the SCM series, rated at 5.5 V with a maximum ESR of 380 mOhm at 1 kHz. This combination of capacitance and low ESR makes it suitable for short-duration backup power, peak-power assist, and ride-through applications where a battery would be oversized or have limited cycle life. The through-hole radial can package (18.50 mm x 9.50 mm, seated height 17.50 mm) with 11.50 mm lead spacing integrates into standard PCB layouts for power-management or hold-up circuits. The 0%, +100% tolerance on capacitance means the minimum guaranteed value is 470 mF — the actual part may deliver up to 940 mF, so the downstream circuit must accommodate the higher end for timing or energy calculations.
Temperature range and lifetime — the operating envelope
Rated for -40°C to 65°C operating temperature with a lifetime of 1000 hours at 65°C. This is typical for aqueous-electrolyte supercapacitors — the lifetime doubles for every 10°C drop below the rated temperature, so at 55°C the expected life is roughly 2000 hours, and at 45°C about 4000 hours. For applications requiring continuous operation above 65°C, a higher-temperature-rated supercapacitor or derating strategy is needed. The 5.5 V rated voltage is the maximum continuous operating voltage. Exceeding this accelerates aging and reduces lifetime; a common practice is to derate to 80% (4.4 V) for extended reliability in always-on systems.