question about mosfet polarity protection current limit

[slajeune]

Hi,

I read the marvelous article on geofex (http://www.geofex.com/Article_Folders/mosswitch/mosswitch.htm) about protection against inverting polarity using a mosfet.  I really like that idea and I want to inlcude this in the ruby tuby design.  Here is the question, what is the maximum current that can go through the MOSFET transistor?

From A datasheet, I see -230mA, therefore, anything above 230mA can burn it, right?

Thanks,
Stephane.

[Nasse]

:shock: BS250 or 170 is nicely enough for pedals pwered with nine volt battery, so I believe. There are power mosfets that can do much much more, heatsink needed of course.  :shock: