Patent ID: 7660096

Claim:
A composite circuit protection device comprising: a polymeric positive temperature coefficient (“PPTC”) element having first and second planar major surfaces, a first electrode sheet formed at the first planar major surface and in intimate electrical contact therewith, and a second electrode sheet formed at the second planar major surface and in intimate electrical contact therewith; a metal oxide varistor (“MOV”) element having third and fourth planar major electrode surfaces; a thermal mass material of predetermined thickness and shape between facing second and third planar major surfaces of the PPTC element and the MOV element for controlling transfer of heat from the MOV element to the PPTC element such that the PPTC element trips to a high resistance state before the MOV element reaches a failure temperature, and for electrically connecting the second electrode sheet and the third major electrode surface; a device first terminal connection at the first electrode; and, a device second terminal connection at the fourth major electrode surface.