a method for making an individual pptc electrical circuit protection device includes steps of inserting two surface - treated conductive electrodes into a mold ; injecting plastic - phase pptc material into a space between the two electrodes ; closing the mold and thereby applying pressure to the electrodes and pptc material to form a completed device ; and removing the completed device from the mold . mold temperature is controlled in a range of between 80 and 125 ° c .