Followup: I use a 50amp Surgeguard all the time.
It was running when it failed, just "groaning" to a stop so I figured it was "shot" and not worth trying to figure out what was wrong being 6 years old (after losing a lightly used Coleman AC after only 5 years).
I will admit to not maintaining the failed Brisk Air recently as well as I should since the Shroud screws stripped from earlier cleanings with AC coil cleaner and inspection/cleaning showed little dirt. However, dumping the Brisk Air off the Roof "removed" the shroud and the Condenser and Squirrel Cage Fan were pretty dusty dirty. On this new one I will be sure to replace any stripped Shroud screws with better ones as needed so I can stay on top of cleaning.