330 mF hold-up cap for 8.1 V rails
The SCMR14J334SSBA0 is a 330 mF supercapacitor from the SCM series, rated at 8.1 V with a 500 mOhm ESR at 1 kHz. It comes in a through-hole radial can with PC pins, sized 26.60 mm x 9.50 mm and 17.50 mm seated height. This part is built for short-term energy storage in applications like backup power, peak-power assist, and ride-through circuits where a battery would be oversized.
The 500 mOhm ESR at 1 kHz sets the internal heating under ripple current. For a 330 mF cap at 8.1 V, that ESR is typical for this class — it means the part can handle moderate charge/discharge pulses without excessive self-heating. The lifetime is rated 1000 hours at 65°C, which is the endurance limit at full rated voltage and temperature. In practice, operating at lower voltage or ambient temperature extends that significantly. The -40°C to 65°C operating range covers most indoor and outdoor telecom, industrial, and consumer environments. Below 0°C the ESR will climb, so derate the ripple current if the circuit sees cold starts.
Through-hole radial can — rework and board fit
This is a through-hole radial can with 0.453" (11.50 mm) lead spacing. The PC pins are stout enough for hand soldering or wave solder. On the rework bench, the can body is large enough that hot air won't cook adjacent parts if you need to remove it — just snip the leads and pull the stubs.