TMOV device
AssigneeDongguan Littelfuse Electronics Company Limited
InventorsMingxi Xu, Hiker Cai
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Abstract
A thermally protected metal oxide varistor includes a body, a first electrode, a thermal fuse, and a glue. The body is made up of a crystalline microstructure including zinc oxide mixed with one or more other metal oxides. The first electrode is located on one side of the body and is connected to a first lead wire. The thermal fuse is connected between the first electrode and the first lead wire. The glue is to be deposited over the thermal fuse as well as over a top portion of the first lead wire.
Claims16
A thermally protected metal oxide varistor comprising:
- a body comprising a crystalline microstructure including zinc oxide mixed with one or more other metal oxides;
- a first electrode disposed on a first side of the body, wherein the first electrode is connected to a first lead wire;
- a second electrode disposed on a second side of the body, wherein the body is sandwiched between the first electrode and the second electrode, and wherein the second electrode is connected to a second lead wire;
- a thermal fuse connected between the first electrode and the first lead wire;
- a glue to be deposited over the thermal fuse and a top portion of the first lead wire;
- and
- a fuse thermal link connecting the thermal fuse to the first lead wire, wherein the glue covers the fuse thermal link.
A thermally protected metal oxide varistor comprising:
- a first electrode coupled to a first lead wire;
- a body disposed adjacent the first electrode, the body comprising a matrix of conductive zinc oxide grains separated by grain boundaries, providing P-N junction semiconductor characteristics;
- a thermal fuse connected between the first electrode and the first lead wire, the thermal fuse to be in series with the body, wherein the thermal fuse breaks connection to the first lead wire in response to a sustained over-voltage condition;
- and
- a glue to be deposited over the thermal fuse, the glue to prevent the thermal fuse from burning and/or carbonizing.
Dependencies are inferred from the claim text.