# Capacitor and discharger selection for pulse discharging

I want a 100 Joule pulse in 350 micro seconds. I have 1000V nbu 1012 capacitor discharge circuit . In datasheet, Max. average power is 3000 W(page 8), however I need 100/350us= 285kW instantaneous power when pulse is activated. Does the nbu circuit can handle 100Joule discharge at 350us, (with any capacitor with maximum voltage is 1000) or should I seach for other pulse discharge circuits?

Additional info: The resistor value is about 20ohms (but I'm not sure, I will check this within 1-2 days). I calculated that 200uF (1000Volts) capacitor can store 100 J. Time constant of RC circuit is 4ms.

Do these calculations say that it is not realizable to discharge 100 Joule in 350us with 1000V capacitor? So should I increase the voltage of capacitor and discharge circuit?

• If your time constant is 4ms then you won't discharge the energy in 350us. What are you attempting to design? What is your 20 ohm load - might it be a coil? Commented Dec 1, 2014 at 8:32
• I want to give pulse to flashlamp which will be about 20 ohm. I do not have capacitor yet, but lowering capacitance might lowers the time constant but a higher voltage is needed. Commented Dec 1, 2014 at 8:49
• Resistor needs to be under 3 ohms (1kV, 330A). Reducing capacitance would imply higher voltage, but that exceeds the discharge circuit rating. Can you parallel load resistors?
– user16324
Commented Dec 1, 2014 at 11:01