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Does the EDSC21100 0 break down into components? If so what are the components?

It does.  The component listing can be found here, page 5 under "Manual Motor Starters".   One important note; even though the SW10 will be a sealing well with the switch, making it factory sealed, the cover will not say "factory sealed" and will not have the UL logo on it.   

If they need UL and a factory sealed switch, the cover with the factory sealed switch will be DSD911 0 S701