公开(公告)号：US20210005362A1

公开(公告)日：2021-01-07

申请号：US16458246

申请日：2019-07-01

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01C1/14 ,  H01C13/02 ,  H01C17/28 ,  H01C17/00 ,  H01C7/13 ,  H01H85/06 ,  H01H85/147

摘要： A PPTC assembly may include a PPTC component, having a trip temperature, and further comprising a first temperature coefficient of resistance, in a low temperature range below the trip temperature. The PPTC assembly may include a resistive component, disposed in electrical contact with the PPTC component on a first side of the PPTC component, the resistive component comprising an electrical conductor, and having a second temperature coefficient of resistance in the low temperature range, less than the first temperature coefficient of resistance. The PPTC component may include a first electrode, electrically coupled to the first side of the PPTC component, and a second electrode, electrically coupled to the second side of the PPTC component, where the PPTC component and the resistive component are arranged in electrical series between the first electrode and the second electrode.

公开(公告)号：US20190080824A1

公开(公告)日：2019-03-14

申请号：US16128135

申请日：2018-09-11

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01B1/02 ,  C08L23/08 ,  C08L23/06 ,  C08L27/16 ,  C08K3/013 ,  C08K3/14 ,  C08K3/38

摘要： A polymeric positive temperature coefficient (PPTC) device including 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 is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.

公开(公告)号：US20190096621A1

公开(公告)日：2019-03-28

申请号：US16138611

申请日：2018-09-21

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01H85/06 ,  C08L23/06 ,  H02H9/02 ,  C08L23/16 ,  C08K3/14

摘要： A fuse device may include 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. The PPTC body may comprise a polymer matrix and a conductive filler, wherein the fuse device has a trip temperature of less than 120° C.

公开(公告)号：US11763968B2

公开(公告)日：2023-09-19

申请号：US17066880

申请日：2020-10-09

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01B1/02 ,  C08L23/08 ,  C08L23/06 ,  C08K3/013 ,  C08K3/14 ,  C08L27/16 ,  H01C1/14 ,  H01C1/148 ,  H01C17/065 ,  H01B1/04 ,  C08K3/38

CPC分类号： H01C7/027 ,  C08K3/013 ,  C08K3/14 ,  C08K3/38 ,  C08L23/06 ,  C08L23/0853 ,  C08L27/16 ,  H01B1/026 ,  H01B1/04 ,  H01C1/14 ,  H01C1/1406 ,  H01C1/148 ,  H01C17/06586 ,  C08K2201/001 ,  C08K2201/005 ,  H01C17/0652 ,  H01C17/06566 ,  C08K3/14 ,  C08L23/06 ,  C08K3/14 ,  C08L23/0853 ,  C08K3/38 ,  C08L23/06 ,  C08K3/38 ,  C08L23/0853

摘要： A polymeric positive temperature coefficient (PPTC) device including 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 is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.

公开(公告)号：US11037708B2

公开(公告)日：2021-06-15

申请号：US16458246

申请日：2019-07-01

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01C1/14 ,  H01C7/13 ,  H01C13/02 ,  H01C17/00 ,  H01C17/28 ,  H01H85/06 ,  H01H85/147

摘要： A PPTC assembly may include a PPTC component, having a trip temperature, and further comprising a first temperature coefficient of resistance, in a low temperature range below the trip temperature. The PPTC assembly may include a resistive component, disposed in electrical contact with the PPTC component on a first side of the PPTC component, the resistive component comprising an electrical conductor, and having a second temperature coefficient of resistance in the low temperature range, less than the first temperature coefficient of resistance. The PPTC component may include a first electrode, electrically coupled to the first side of the PPTC component, and a second electrode, electrically coupled to the second side of the PPTC component, where the PPTC component and the resistive component are arranged in electrical series between the first electrode and the second electrode.

公开(公告)号：US20210082603A1

公开(公告)日：2021-03-18

申请号：US17066880

申请日：2020-10-09

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01B1/02 ,  C08L23/08 ,  C08L23/06 ,  C08K3/013 ,  C08K3/14 ,  C08K3/38 ,  C08L27/16 ,  H01C1/14 ,  H01C1/148 ,  H01C17/065 ,  H01B1/04

摘要： A polymeric positive temperature coefficient (PPTC) device including 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 is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.

公开(公告)号：US20210313135A1

公开(公告)日：2021-10-07

申请号：US17349065

申请日：2021-06-16

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01H85/06 ,  C08K3/14 ,  C08L23/06 ,  C08L23/16 ,  H02H9/02

摘要： A fuse device may include 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. The PPTC body may comprise a polymer matrix and a conductive filler, wherein the fuse device has a trip temperature of less than 120° C.

公开(公告)号：US10777340B2

公开(公告)日：2020-09-15

申请号：US16128204

申请日：2018-09-11

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01B1/02 ,  C08L23/08 ,  C08L23/06 ,  C08K3/04 ,  C08K3/14 ,  C08K3/38 ,  C08L27/16 ,  H01C1/14 ,  H01C17/065

摘要： A polymeric positive temperature coefficient (PPTC) device including 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 is formed of a PPTC material that includes a maximum of 65% by volume of a conductive filler, wherein 10%-39% by volume of the PPTC material is a conductive ceramic filler and wherein the rest of the conductive filler includes at least one of carbon and a metallic filler.

公开(公告)号：US20190080825A1

公开(公告)日：2019-03-14

申请号：US16128204

申请日：2018-09-11

申请人： Littelfuse, Inc.

发明人： Jianhua Chen ,  Chun Kwan Tsang

IPC分类号： H01C7/02 ,  H01B1/02 ,  C08L23/08 ,  C08L23/06 ,  C08L27/16 ,  C08K3/04 ,  C08K3/14 ,  C08K3/38

摘要： A polymeric positive temperature coefficient (PPTC) device including 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 is formed of a PPTC material that includes a maximum of 65% by volume of a conductive filler, wherein 10%-39% by volume of the PPTC material is a conductive ceramic filler and wherein the rest of the conductive filler includes at least one of carbon and a metallic filler.