Patent ID: 8525636

Claim:
A thermistor comprising: a first electrically conductive member; a second electrically conductive member; and a polymeric material layer laminated between the first electrically conductive member and the second electrically conductive member, the polymeric material layer exhibiting positive temperature coefficient behavior, the polymeric material layer comprising at least one crystalline polymer and at least one conductive filler dispersed in the crystalline polymer, wherein the conductive filler has a resistivity less than 500 Ω-cm, and comprises 72-96% by weight of the polymeric material layer; wherein the thermistor has a device effective area, the value of a hold current of the thermistor at 60° C. divided by the device effective area is between 0.2 A/mm 2 and 0.8 A/mm 2 ; wherein a ratio of the hold current of the thermistor at 60° C. to a hold current of the thermistor at 25° C. is between 40% and 95%.