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US 10,950,372 B2Granted
Surface mounted fuse device having positive temperature coefficient body
AssigneeLittelfuse, Inc.
InventorsZhiyong Zhou, Jianhua Chen, Chun-Kwan Tsan
Life of this patent
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Abstract
A PPTC device including a PPTC body, a first electrode, disposed on a first side of the fuse component, a second electrode, disposed on a second side of the PPTC body, wherein the PPTC body comprises a polymer matrix and a conductive filler.
Claims12
A fuse device, comprising:
- a PPTC body;
- a first electrode, disposed on a first side of the PPTC body;
- a second electrode, disposed on a second side of the PPTC body;
- wherein the PPTC body comprises a polymer matrix and a conductive filler, wherein a current density for a hold current of the PPTC body is less than 0.16 A/mm2;
- and
- wherein a particle size of the conductive filler is small compared to a thickness of the PPTC body between the first electrode and the second electrode, wherein multiple interfaces are formed between particles of the conductive filler between the first electrode and the second electrode, leading to increased resistance as current travels between the first electrode and the second electrode.
3 more elements
A fuse device, comprising:
- a PPTC body;
- a first electrode, disposed on a first side of the PPTC body;
- and
- a second electrode, disposed on a second side of the PPTC body;
- wherein the PPTC body comprises a polymer matrix and a conductive filler, wherein a current density for a hold current of the PPTC body is greater than 0.4 A/mm2;
- and
- wherein a particle size of the conductive filler is large compared to a thickness of the PPTC body between the first electrode and the second electrode, wherein one or two interfaces are formed between particles of the conductive filler between the first electrode and the second electrode, leading to reduced resistance as current travels between the first electrode and the second electrode.
4 more elements
A fuse device, comprising:
- a PPTC body;
- a first electrode, disposed on a first side of the PPTC body;
- and
- a second electrode, disposed on a second side of the PPTC body;
- wherein the PPTC body comprises a polymer matrix and a conductive filler, wherein the PPTC body is elongated in a first direction, wherein the PPTC body comprises a first elongated side and a second elongated side, extending along the first direction, and wherein the first side and the second side extend perpendicularly to the first direction;
- and
- wherein a particle size of the conductive filler is large compared to a thickness of the PPTC body between the first electrode and the second electrode, wherein one or two interfaces are formed between particles of the conductive filler between the first electrode and the second electrode, leading to reduced resistance as current travels between the first electrode and the second electrode.
4 more elements
Dependencies are inferred from the claim text.