Is there any other options to switch this voltage? As per my application there is a two source voltage(500VAC & 1000VAC) Sometimes it may go to 1500VAC depends upon the variant but its rare to use. For my condition, at a time one voltage only in ON state it may 500VAC or 1000VAC. That's why am asking switch to achieve this condition.
One question is just how good a "switch" this needs to
be. If you can throw away a volt or three, then a TRIAC
(or back-back SCRs) could do the job. Optically triggered
or pulse transformer triggered for isolation. See 6500V
SiC SCRs out there (again you won't like the price).
And you say nothing thus far about safety or a need
to get this (product?) certified / listed. That could be
a real options-limiter.