The double pole double throw one can switch 2 wires between 2 separate circuits. Such as 2 lines from a turbine switching between batteries and a dump load or short for parking.

As far as using it to switch AC circuits, I didn't see any UL approval on it so its certainly not going to meet code for AC. From a purely "can it do it?" angle, it probably can.

I hesitate to just say "yes" not knowing your knowledge of electricity and circuits. I would use it to switch between AC sources but I have decades of experience in several electrical fields and the confidence to know what is going to work and what is not going to work.

Tom