Proper contactor

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Compressor contactor should be sized according to LRA rating and operating voltage of compresor and not FLA, and we should choose contactor with LRA rating same, or better, one size above that.
Rating.jpg

In this way we dont need to worry if AC3 rating matches starting carateristic of our compresor type!

On the other hand, compressor contactor thermal protection should be set exactly at compressor FLA rating and not "slightly" above that, because triping treshold of 1,14x is already incorporated in setting dial.
Also, there are 4 classes of thermal overload.
https://www.se.com/in/en/faqs/FA22893/

Class 10 should be used for refrigeration compressors.

What I prefer to use, if there is place in switchboard, aditionaly motor circuit protector.
https://thegrid.rexel.com/en-us/know...protector-mcp#