Varistor including reflowable thermal protection device on varistor surface
AssigneeLittelfuse, Inc.
InventorsJianhua Chen, Marco Doms, Chun-Kwan Tsang
Life of this patent
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Abstract
A circuit protection device may include a varistor body including a first side, wherein a thermal electrode is disposed along the first side, and wherein a first lead is electrically connected to the thermal electrode and a second lead is electrically connected to a second side. The circuit protection device may further include a reflowable circuit protection device atop the thermal electrode, and a third lead connected to the reflowable circuit protection device, wherein an end of the third lead is a spring connected to the thermal electrode by a conductive element.
Claims16
A circuit protection device, comprising:
- a varistor body, comprising:
- a first side;
- and
- a thermal electrode disposed along the first side, wherein a first lead is electrically connected to the thermal electrode and a second lead is electrically connected to a second side;
- a reflowable circuit protection device atop the thermal electrode;
- and
- a third lead connected to the reflowable circuit protection device, wherein an end of the third lead is a spring connected to the thermal electrode by a conductive element.
A fuse, comprising:
- a varistor body, comprising:
- a first side opposite a second side;
- and
- a thermal electrode disposed along the first side, wherein a first lead is electrically connected to the thermal electrode and a second lead is electrically connected to the second side;
- a reflowable circuit protection device connected to the thermal electrode;
- and
- a third lead connected to the reflowable circuit protection device, wherein an end of the third lead is a spring connected to the thermal electrode by a conductive element.
A method of operating a circuit protection device, comprising:
- electrically connecting a first lead to a thermal electrode along a first side of a varistor body;
- electrically connecting a second lead to a second side of the varistor body;
- connecting a reflowable circuit protection device to the thermal electrode;
- and
- connecting a third lead to the reflowable circuit protection device, wherein an end of the third lead is a spring connected to the thermal electrode by a conductive element;
- receiving a force to a restraining element of the reflowable circuit protection device to cause the end of the third lead to move away from the thermal electrode in response to a thermal event.
Dependencies are inferred from the claim text.