Abstract: A resistance stable polymer positive temperature coefficient (PPTC) material is provided that can include a polymer matrix, a plurality of filler components disposed in the polymer matrix, and a plurality of carbon black particles bonded around each of the plurality of filler components to increase dispersion of the plurality of carbon black particles in the polymer matrix, thereby increasing a conductive volume of the polymer matrix and reducing a resistance variance in the polymer matrix.

Abstract: A method for preparing a preparing a polymeric positive temperature coefficient (PPTC) compound and conformally applying such compound to a substrate in accordance with an embodiment of the present disclosure may include preparing and mixing raw materials to form a PPTC mixture, processing the PPTC mixture through polymer compounding equipment, wherein the PPTC mixture is heated and is extruded as a PPTC compound, performing a beaming process on the polymer compound to establish crosslinking between polymer chains in the PPTC compound, and applying the PPTC compound to a substrate using a hot application process wherein the PPTC compound is heated and is conformally applied to a surface of the substrate.

Abstract: A high stability polymer positive temperature coefficient (PPTC) material. The high stability PPTC material may include a polymer matrix, the polymer matrix defining a PPTC body, and a conductive filler component, disposed in the polymer matrix. The conductive filler component may include a plurality of carbon black particles, wherein the plurality of carbon black particles comprises an average particle size of 50 nm or less, and wherein the plurality of carbon black particles comprise a treated surface.

Abstract: A polymer positive temperature coefficient (PPTC) material is provided. The PPTC material may include a polymer matrix that defines a PPTC body, and further includes a high temperature polymer. The PPTC material may include a conductive filler component, disposed in the polymer matrix, an arc suppressant, and a high temperature antioxidant, disposed in the polymer matrix.