how do you use the insulator kit that comes with the LM338K voltage regulator?


seandogue7 years ago
the insulator is used to electrically isolate the base of the semiconductor from the heat sink, in order to avoid accidental shorting to ground/common. The Heatsink may be an external cast aluminum heat sink or a PCB island.

In general, we apply thermal transfer compound to the underside of the semiconductor (the 338K is a TO-3 pkg isn't it?) , then apply the isolator to the 338K, then apply a bit more between the insulator and the heatsink or island to complete the thermal conduit.

If that didn't sink in, lemme know and I'll toss a little graphic together and post.  (but only if you don't get what I'm saying please)

best wishes