In a surge absorber, a pair of protrusion electrodes is fixed to a pair of
terminal electrode members at positions shifted from the center of the
terminal electrode members to be point-symmetrical with the center of a
ceramic insulator tube and a distance between the protrusion electrodes
is adjusted so as to obtain a desired discharge starting voltage. As a
result, it is possible to easily change the distance between the
discharge electrodes without changing the length of the discharge
electrodes.
