Can this unit be mounted on an outdoor sub panel where rain will come into contact with it?

Hello Steve, In order to help you we need to know more information about your application with this product. You can contact us anytime using our chat live https://www.se.com/us/en/work/support/customer-care/contact-schneider-electric.jsp where an agent will be able to give you further assistance on this matter. Warm regards. Schneider Electric Customer Care