[BrianG]

Did you mean they can all fail closed? I assumed that the FET S-D terminals shorted (or were driven that way). Anyway, fair enough. It just seems that most other BECs fail by simply stopping to operate.

Knowing that, how hard/expensive would it be to incorporate a voltage switch at the output to cut power if it exceeds a certain value? Since the CCBEC is adjustable to 9v, it would have to be above that...