The SCMQ14C474PRBA0 is listed as Active by KYOCERA AVX, so it is still in factory production and available for new designs.
470 mF at 5 V — sizing the hold-up bank
Rated 470 mF at 5 V, this supercapacitor stores about 5.9 J of energy — enough to ride through a 100 ms power dropout at 50 W or hold up an RTC for days. The 400 mOhm ESR at 1 kHz sets the internal heating during charge/discharge: at a 1 A pulse the I²R loss is 0.4 W, so the 65°C lifetime rating of 1000 hours applies. For longer life at elevated temperature, derate the ripple current or keep the ambient below 65°C. The wide tolerance (0%, +100%) is typical for supercapacitors — the minimum capacitance is guaranteed at end of life; a fresh part measures at or above 470 mF.
Through-hole radial can — board integration
Packaged in a radial can with 0.354-inch (9.00 mm) lead spacing and PC pin termination. The through-hole body provides mechanical stability under vibration compared to surface-mount supercapacitors of similar capacitance.