>This has got me thinking (sorry to hijack the thread!).  It's fairly easy
>to get hold of MOSFETs that will handle 70A or so, which are in a TO220
>case.
>Now to handle that much current in a domestic mains installation you'd have
>to use cable with a cross-sectional area of about 16mm=B2, whereas a TO220=
's
>leads are maybe a couple of square millimetres at most.  I realise that
>installed cables have lots of other issues, such as thermal insulation,
>voltage drop and so on, but can those little leads really handle scores
>of amps without turning incandescent?

had another thought about this ...

"The die is willing, but the leads are weak ..." =


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