TRANSIENT VOLTAGE PROTECTION DEVICE

To provide a transient voltage protection device capable of controlling a region where discharge is generated.SOLUTION: A transient voltage protection device 1 comprises: an element body 2; an internal electrode 5 and an internal electrode 6 provided in the element body 2 so as to be away from each other; an external electrode 3 connected with the internal electrode 5; an external electrode 4 connected with the internal electrode 6; and a discharge auxiliary part 7 containing a metal, contacted with the internal electrode 5 and the internal electrode 6, and provided in the element body 2 so as to connect between the internal electrode 5 and the internal electrode 6. The discharge auxiliary part 7 has at least a first region R1 and a second region R2. A metal concentration of the first region R1 is higher than that of the second region R2.SELECTED DRAWING: Figure 3 【課題】放電を生じさせる領域を制御することが可能な過渡電圧保護デバイスを提供する。【解決手段】過渡電圧保護デバイス１は、素体２と、互いに離間して素体２内に設けられた内部電極５及び内部電極６と、内部電極５と接続された外部電極３と、内部電極６と接続された外部電極４と、金属を含み、内部電極５及び内部電極６と接すると共に、内部電極５と内部電極６とを互いに接続するように素体２内に設けられた放電補助部７と、を備える。放電補助部７は、少なくとも第一領域Ｒ１及び第二領域Ｒ２を有し、第一領域Ｒ１の金属濃度は、第二領域Ｒ２の金属濃度よりも高い。【選択図】図３