Patent ID: RE44224

Claim:
A surface-mounted over-current protection device, comprising: at least one conductive composite module, comprising: a first metal foil; a second metal foil; and a PTC material layer stacked between the first metal foil and the second metal foil, exhibiting a resistivity below 0.2 Ω-cm, comprising at least one crystalline polymer and at least one conductive filler distributed in the at least one crystalline polymer and exhibiting a resistivity below 500 μΩ-cm; a first metal electrode electrically connected to the first metal foil; a second metal electrode electrically connected to the second metal foil; and at least one first insulated layer disposed between the first metal electrode and the second metal electrode to electrically insulate the first metal electrode from the second metal electrode; wherein the surface-mounted over-current protection device, at 25° C., indicates that the value of a hold current thereof divided by the product of a covered area thereof and the number of the conductive composite module is from 0.16 0.215 A/mm 2 to 1 A/mm 2 .