That's not the way any switching device works!
An SCR is (simplifying outrageously) either non conducting in which condition it stands off lots of volts but passes essentially zero current, or conducting in which case the voltage is 1V or so and however much current is required to make that be a thing flows.
Rule of thumb : Each maximum rating is independent, you need to satisfy all of them at all times.
Now there are some parts that operate in the linear region, where things can get even more complex and there are some other limits that can be quite a bit lower then the ones on the front page of the datasheet that must also be complied with.... (And SCRs I would note have some dynamic limits as well, things like a maximum dI/dt value).
Regards, Dan.