Patent ID: 8421583
Filing Date: 2013-04-16
Classification: H01C

Abstract:
1. A PTC device comprising: (1) a polymer PTC component comprising a polymer PTC element and a first and a second metal electrode disposed on both sides of the main surface thereof; (2) a lead connected to at least one of the metal electrodes of the polymer PTC component; and (3) a ceramic package having an open-ended space for accommodating the polymer PTC component, said open-ended space having at least one opening that defines the open-ended space, the PTC device being characterized by (a) said lead which closes said opening in order to isolate the polymer PTC component disposed in said open-ended space from the environment surrounding the ceramic package, (b) the ceramic package being a housing with a bottom which has an opening on one of the main surfaces thereof and further has an electrical conductor connecting an outer side and an inner side defining the bottom of said housing with the bottom, wherein (c) the ceramic package having a feed-through hole across the bottom and an electrical conductor connecting the inner side and the outer side of the bottom via the feed-through hole, wherein the second lead disposed on the outer side of said bottom is connected to said electrical conductor while at the same time closes said feed-through hole.