[Cruisin Marine]

This is also something I have recently observed, or rather observed large differences between batches of the same component type. So much so that a fresh supply of the same type from the same brand were so different as to render an analog switch circuit inoperable.

I found similar, the only easy answer was to match the usable FET's on a curve tracer. As long as they are not fakes, like I mentioned in a post above.