Positive temperature coefficient polymer composition and positive temperature coefficient circuit protection device

A positive temperature coefficient polymer composition, comprising:

• a polymer component;
• and
• an electrically conductive filler component including an electro-conductive metallic particulate, an electro-conductive ceramic particulate, and an electro-conductive carbon particulate;
• wherein the weight ratio of said polymer component to said electrically conductive filler component ranges from 1:13 to 1:5.5,
• wherein the weight of said electro-conductive metallic particulate is higher than that of said electro-conductive ceramic particulate, and the weight of said electro-conductive ceramic particulate is higher than that of said electro-conductive carbon particulate, and
• wherein, based on the weight of said electrically conductive filler component, said electro-conductive carbon particulate is present in an amount ranging from 3.4 wt % to 6.8 wt %, said electro-conductive metallic particulate is present in an amount ranging from 59.6 wt % to 85.4 wt %, and said electro-conductive ceramic particulate is present in an amount ranging from 11.2 wt % to 33.7 wt %.