About the *evil* shorting of output: Others (ReCom) specify a max 10s shot, else-wise get the ~10% more expensive '/P' model, witch has 'Short Circuit Protection'.
Oh, and you can now get 3W in a (smaller than Dave's) SIP4 package like MuRata's MEE3S0515SC.
While this device also has a 1kV isolation, note that this is tested for only 1s, and that a continual 1kV will kill the device.
Do you think this is a common limitation? Me too.
/holger