Hi Kittyprincess
You have landed on a planet
where 40 microamps is heavy current
We mainly dabble with radio, RF, weak electromagnetic
fields etc.
However, we probably have a number
of electrical engineers present who might help.
I am not sure where the capacitor figures in this
unless
a) it is to do with 3 phase to single
phase conversion or
b) the rectifier filter capacitor.