Panasonic Corporation

Noriko Sawada

Eiichi Koga

Seiichi Minami

Hirofumi Yamada

Mikinori Amisawa

Tomohisa Okimoto

A surge absorbing element has a first electrode, a second electrode, and a ceramic layer. The second electrode is opposed to the first electrode. The ceramic layer has a polycrystal structure including a plurality of crystal grains showing voltage nonlinearity, and is at least partially brought into contact with the first electrode and the second electrode. The ceramic layer has a void inside therein, and surface discharge is generated on surfaces, exposed to the void, of the crystal grains, whereby electric conduction is attained between the first and second electrodes.

Surge absorbing element

A voltage non-linear resistor ceramic composition has ZnO as a main component and is represented by the general formula (1&#x2212;x)ZnO+x[SrM][CoA]O. Here, M is at least one of Ca and Ba, and A is Mn or Cr. x, y, z and a indicate molar ratios, and 0.0005&#x2266;x&#x2266;0.10, 0&#x2266;y&#x2266;0.8, 0&#x2266;z&#x2266;0.8, and &#x2212;0.1&#x2266;a&#x2266;0.2 are satisfied.

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Hokkaido, Japan

Noriko Sawada