Why common mode voltage can damage device?
In the diagram below V1 is the common mode voltage







simulate this circuit &ndash; Schematic created using CircuitLab

You would expect VOut to be 0V (in an ideal amplifier) because its inputs are at the same potential (being connected together). In fact the op-amp will probably just catch fire, because the common mode voltage is way higher than the supply voltage and well outside the specification for common mode voltage for (most) real world devices