CURRENT LIMITER AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a current limiter whose energizing property and current limiting pulse height value are stable, and to provide its manufacturing method. SOLUTION: The current limiter is provided with a PTC element and a pair of electrode sandwiching the PTC element. The sandwiching faces of a pair of the electrodes are formed as rough faces having numerous projections and recesses. All the projection parts or a part of them on the rough faces are brought into contact with the PTC element so that they can be connected electrically. An insulator which is dissolved or almost dissolved due to heat generation at a first current limiting operation is made to interpose between one sandwiching face or both faces in a pair of electrodes.