Hello.
I have to drain a bank of HV capacitors, with capacity of 3300uf, charged up to 400V, to different voltages, down to 100V.
This might happen as fast as once per 3-4 seconds, but in most cases, that would happen once-twice per minute.
To do so, I plan to use thick wire wound resistor of 40 ohms, which will be connected to that bank via transistor, either mosfet or igbt.
The transistor will be controlled via dedicated optocoupler, to isolate hot and cold sides.
Since there's 40 ohm resistor, worst case current will be 10 amps, for less than a second. So what kind of transistor is preferable in this situation?
Mosfet or IGBT ?