focalist:
They arrived today, I swapped in one on a circuit I was using the fairchild version with, performed beautifully.In all honesty, if I thought there would be a heat problem, at this cost per unit it would probably just be simpler to split the load onto two or three mosfets rather than mess around with heat sinking those pads.
One stepper motor circuit I did used ULN2003 darlington arrays. When the chips started getting hot, I did the super simple fixit... Stacked a second ULN2003 right on top, soldered the leads together, splitting the load. Ran much cooler but I would not recommend this as a practice.. Lol
Mine arrive today also, but I'm only about 60 miles north of San Jose. They are nice looking and I suspect will be very useful for switching loads larger then small TO-3 package transistors can handle, but not requiring a full size TO-220 higher wattage dissipation package.
Lefty