What this supercapacitor brings to the board
The KYOCERA AVX SCMS32F505PRBA0 is a 5 F, 5.5 V supercapacitor from the SCM series, packaged in a through-hole radial can with PC pin termination. The 0%, +100% tolerance on capacitance means the actual value can land anywhere from 5 F to 10 F; design the hold-up time or ripple filter around the worst-case minimum, not the nominal.
Rated 5.5 V with a 120 mOhm ESR at 1 kHz — the ESR is the dominant loss term in a pulse-discharge application like a backup capacitor for an RTC or a peak-power buffer in a wireless sensor node. At 5 F, the RC time constant against the ESR is about 0.6 seconds (5 F × 0.12 Ω), so the cap can deliver a burst of current in the hundreds of milliamps for a few hundred milliseconds before the voltage sags below the load's brownout threshold. The 5.5 V rating is a hard ceiling — running it at 5 V or below extends the lifetime beyond the 1000-hour spec at 65 °C, but exceeding 5.5 V even briefly accelerates ageing and can vent the can.
Temperature, lifetime, and where it fits
Rated for 1000 hours at 65 °C — this is the accelerated life test condition; at 40 °C the lifetime roughly doubles per 10 °C drop, so a 40 °C ambient gives about 4000 hours of continuous operation before the capacitance drops 30%. The operating range is -40 °C to 65 °C — cold performance is limited by electrolyte conductivity, not freeze damage; expect the ESR to rise 2-3× at -40 °C.