Greetings,
Some added context would be helpful, particularly in regard to any specific devices or components you’re looking at, reference circuits you’re thinking of using, the specific nature of any electrical insults in question, etc.
I am relatively new to Digikey, and am having trouble locating these parts.
The MOV and TVS Diode families are pretty easily found using those respective search terms, but I’m not certain whether by “locating these parts” you’re referencing search techniques or identifying devices that are suited to your needs.
There’s a post here that discusses MOV parameters/selection in brief, and this resource does so more rigorously. The essential ideas for selection are pretty much the same for both MOVs and TVS diodes, since they both do essentially the same thing albeit using different technologies.