This is an electrolytic 400 vdc 12,000uF capacitor capable of discharging 960J of energy. It is approximately 12″ in height with a 3″ diameter base.

Discharge onto a 1/16″ aluminum plate. The discharge left two vaporized patches, each roughly 1″ in diameter.



Discharge into a 2″ cluster of steel wool.




Discharge onto four layers of aluminum foil.



Videos of several 1kJ capacitor discharges:
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