Provided is a switching element including: first switching element
primarily used for formation of a two-way current path; a second
switching element that forms, at the time when the first switching
element is turned off, a current path by switching a parasitic diode from
another; and a third switching element. The second and third switching
elements may be of smaller chip size because they allow a current to flow
through them only while the current path of the first switching element
is being switched. This contributes miniaturization of the switching
element as well as reduction in the ON resistance. Moreover, adoption of
the switching element to a protection circuit realizes miniaturization of
the protection circuit.