35 F energy storage with 20 mOhm ESR
The KYOCERA AVX SCCU30B356SRB is a 35 F supercapacitor in the SCC series, rated at 2.7 V with a 20 mOhm ESR at 1 kHz. That ESR figure is the key spec for pulse-power and backup applications — it determines how fast the cap can deliver current and how much heat builds up during charge/discharge cycles. At 35 F and 2.7 V, the stored energy is roughly 128 J, enough to hold up a real-time clock or bridge a power dropout for several seconds depending on the load. The -10%, +30% tolerance on capacitance means the actual part can measure anywhere from 31.5 F to 45.5 F at shipment. For a backup-timing circuit, design the hold-up time around the minimum value; the extra headroom on the high side is a safety margin, not a spec you can count on for precision.
Through-hole radial can for PCB mounting
Packaged in a radial can with 0.295" (7.50 mm) lead spacing and PC pin termination, this supercapacitor mounts directly into a standard through-hole PCB footprint. The Bulk package means it ships loose in tubes or trays, not taped and reeled. For automated pick-and-place, you will need a tube feeder or manual insertion — factor that into assembly cost if you are running high volume.
Temperature envelope and lifetime derating
Rated for -40°C to 65°C operating temperature with a lifetime of 1000 hours at 60°C. That 1000-hour figure at 60°C is the accelerated-test baseline — every 10°C drop roughly doubles the expected life, so at 45°C ambient you can expect around 4000 hours, and at 25°C the lifetime extends well beyond 10,000 hours. Stay below 65°C to avoid rapid capacitance fade and ESR increase. The 2.7 V rated voltage is the standard cell voltage for supercapacitors. In a series stack for higher voltage rails, you need voltage balancing resistors to keep each cell within its rating — the 20 mOhm ESR is low enough that imbalance currents can be significant without balancing.
Active production — sourcing posture
Lifecycle status is Active — KYOCERA AVX still produces the SCCU30B356SRB. No pin-compatible direct alternative exists within the SCC series at the same 35 F / 2.7 V rating — the closest parametric match would be a different capacitance value or voltage, which changes the hold-up time or series-stack count. Stick with this order code unless you are respinning the board.