dude, I work with fets all day every day. that doesn't mean anything. a fet or field effect transistor doesn't specify current carrying capacity. the ones I work with will only handle about 13 miliamps per cell. obviously there are several cells paralleled.
engineering gets it done
remember, heat sinks and silly grease (conductive silicon grease) and you can parallel them if you need to. you could also go so far as using a cooling fan but now you are reaching the realm of just buying one that is pre-made.
Be the change you wish to see in the world
I started ordering parts for the EFIE. I got the 5.0v Voltage Regulators in today.
I can't believe how tiny they are! Part number is LM38690DT-5.0 and they're free from nsc.com. What threw me off is they shipped to me Next Day Air. Totally wasn't expecting that.
BEEF, I don't plan on running toooo much off this PWM, I got it working this weekend. The transistor I went with only handles 5.0 amps constant(8.0 peak) so if I do in fact build an HHO cell to try in the car I'll need to build a daughter board that the PWM drives.