But since I could not find original Motorola and I really wanted to have a second AC adapter for my Xoom, I compared the original and this one again.
It could be seen that the pin at the Motorola power supply is a little longer, and this also has no small sips the plug.
So I extended the pin, as I have cut with a sharp knife about 2mm from the rubber cover so that the pin now at this continues 2mm outstanding.
Now the contact is well established and the plug holds as good as the original.
Those who do not shy away from this simple tinkering, receives a functioning power supply for the MZ601 for little money