Re: TO3 & HEATSINK

From: Norm Dresner (ndrez_at_att.net)
Date: 07/28/04 

Date: Wed, 28 Jul 2004 00:34:02 GMT

"exxos" <exxos@home.co.uk> wrote in message
news:4106d62f$0$6451$cc9e4d1f@news-text.dial.pipex.com...
> Hi all,
>
> Instead of mounting the TO3 transistor ont he flat part (bottom) onto the
> heatsink, do you lot recon I could drill a large hole in a heatsink and
> mount the can side into it, and put heatpaste around the can and screw it
> down from the top ? does anyone have any thoughts if this would work as
good
> or worse than the bottom just being bolted to the heatsink ?
>
> The transistor I have in mind is a 2N5038, a little higher wattage than
the
> 3055, I plan to have around 50watts constant disipation, it should be ok,
> right ??
>
> Thanks
> chris

The actual die is mounted to the base of the package. Your scheme increases
the thermal resistance from the junction to the case.

    Norm

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