Positive temperature coefficient device.

摘要

A positive temperature coefficient ("PTC") device body (1) is formed by compression moulding of an organic PTC composition consisting of a crystalline polymer with conductive particles dispersed therein. The body (2) is sandwiched between electrodes (3) to which terminals are attached by spot welding or soldering. The PTC device body is aged at normal pressure and at a temperature higher than the peak resistance temperature, that is, the temperature at which its resistance is a maximum, and lower than 250 DEG C. The resistance of the PTC device does not change either before or after exposure to high temperatures, that is, temperatures substantially greater than 250 DEG C, and the PTC characteristics of the device do not decrease despite aging. Therefore PTC devices made according to the present invention can be surface-mounted.