Dave your question is bit of apples and oranges. You really need the resistor
that will sustain your pulse. You are mixing power and energy. Energy = Power
x time i.e.( watt hour = watts x time).
You are correct that resistors are rated in watts but there are other
characteristics, such as inductance, pulse handling, etc. which must be
addressed to properly answer your question. This may mean spending some time
in the lab measuring the parameters of interest.
Regards,
Fred Townsend
DC to Light
Dave Wilson wrote:
Hi,
I need to determine what power rating a resistor has to be to adequately
dissipate 0.5J (a 1.2/50us surge of 500V from a 500 ohm source). Anyone have a
conversion formula?
Thanks in advance,
Dave
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