Is there a Eurail Switzerland Pass?
No, Switzerland is not available as a One Country Pass. However, Eurail does offer various train passes which combine Switzerland with 1 or more other country.
The following Eurail Passes include access to the Swiss rail network:
Global Pass (Switzerland and 27 other European countries)
Select Pass (Switzerland and 1, 2, or 3 other bordering countries)
If you are looking for a rail pass for Switzerland only, the Swiss Federal Railways (SBB) offer a Swiss Travel Pass.