| 摘要 |
PROBLEM TO BE SOLVED: To provide a PTC limiter capable of preventing a flashover phenomenon from occurring between contact electrodes. SOLUTION: In the PTC limiter for limiting current by using PTC characteristics, the PTC limiter, or the like is adopted. The PTC limiter includes a PTC element having the PTC characteristics and upper and lower contact electrode opposingly arranged by sandwiching the PTC element, and meets V/L<10 and V/B<50 (in this case, V(volt) is a rated voltage of the PTC limiter.) conditions when distance from the end of the upper contact electrode to that of the PTC element, distance from the end of the lower contact electrode to that of the PTC element, the thickness of the PTC element, and L are set to a1(mm), a2(mm), and b(mm), and the minimum value of a1+a2+b, respectively. As a result, the occurrence of the flashover phenomenon is effectively prevented between the electrodes in the PTC limiter. COPYRIGHT: (C)2006,JPO&NCIPI
|
