SURGE ABSORBER AND METHOD FOR MANUFACTURING SAME

摘要

A surge absorber is provided with a glass tube (2); a pair of sealing electrodes (3) which block openings at both ends of said glass tube (2) to seal discharge gas therein; and a plate-shaped insulator (4) having the pair of the sealing electrodes (3) arranged at both ends thereof, said insulator housed inside the glass tube (2). At least one of the two end portions (4a) of the plate-shaped insulator (4) has the same width as the inner diameter of the end portion of the glass tube (2), and at least the width of the intermediate portion (4b) of the plate-shaped insulator (4) is set narrower than the inner diameter of the end portion of the glass tube (2).