Patents Assigned to Littelfuse Electronics (Shanghai) Co., Ltd.
  • Publication number: 20250157770
    Abstract: A breaker assembly features a housing. a mini-breaker, a first terminal, and a second terminal. The mini-breaker includes a third terminal and a fourth terminal. The first terminal has a first lead that is connected to the fourth terminal once the first terminal is placed in the housing. The second terminal has a second lead that is disposed over the third terminal once the second terminal is placed in the housing.
    Type: Application
    Filed: February 16, 2023
    Publication date: May 15, 2025
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Kevin Liang, Bing Wang, Tao Guo
  • Patent number: 12211632
    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.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: January 28, 2025
    Assignee: Dongguan Littelfuse Electronics Company Limited
    Inventors: Mingxi Xu, Hiker Cai
  • Patent number: 12131849
    Abstract: A flat spring (100) is disclosed, for use in a surge protection device (SPD) such as a fast activation thermal fuse, to be integrated with a thermal metal oxide varistor (TMOV). The flat spring (100) has a V-shaped protrusion (110) to enable ultra-high short circuit current protection under overvoltage condition.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: October 29, 2024
    Assignee: Dongguan Littelfuse Electronics Company Limited
    Inventors: Long Min, Libing Lu, Dongjian Song
  • Publication number: 20240246102
    Abstract: Disclosed are various pallet assemblies for arc spray applications. In some embodiments, an assembly may include a top frame comprising a plurality of recesses each operable to receive an electronic device, and a bottom frame coupled to the top frame, wherein the bottom frame comprises a plurality of support structures, and wherein each support structure of the plurality of support structures is aligned with a corresponding recess of the plurality of recesses. The assembly may further include a mechanical device coupled to the top frame and the bottom frame, wherein the mechanical device is operable to bias the top frame and the bottom frame relative to one another.
    Type: Application
    Filed: April 4, 2024
    Publication date: July 25, 2024
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Werner Johler, Dongjian Song, Libing Lu
  • Publication number: 20240249862
    Abstract: A thermally protected metal oxide varistor (TMOV) is disclosed. The TMOV features one or more magnets connected to the arc shield of the TMOV and a sensor. Once a fault condition occurs, the arc shield movement places the magnets near the sensor, causing the sensor to indicate the fault condition, enabling a technician to repair or replace the TMOV.
    Type: Application
    Filed: July 6, 2022
    Publication date: July 25, 2024
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Long Min, Dongjian Song, Libing Lu
  • Patent number: 11998937
    Abstract: Disclosed are various pallet assemblies for arc spray applications. In some embodiments, an assembly may include a top frame comprising a plurality of recesses each operable to receive an electronic device, and a bottom frame coupled to the top frame, wherein the bottom frame comprises a plurality of support structures, and wherein each support structure of the plurality of support structures is aligned with a corresponding recess of the plurality of recesses. The assembly may further include a mechanical device coupled to the top frame and the bottom frame, wherein the mechanical device is operable to bias the top frame and the bottom frame relative to one another.
    Type: Grant
    Filed: July 6, 2022
    Date of Patent: June 4, 2024
    Assignee: Dongguan Littelfuse Electronics Company Limited
    Inventors: Werner Johler, Dongjian Song, Libing Lu
  • Publication number: 20240170242
    Abstract: A polymer positive temperature coefficient (PPTC) material is provided. The PPTC material may include a polymer matrix that defines a PPTC body, and further includes a high temperature polymer. The PPTC material may include a conductive filler component, disposed in the polymer matrix, an arc suppressant, and a high temperature antioxidant, disposed in the polymer matrix.
    Type: Application
    Filed: October 31, 2023
    Publication date: May 23, 2024
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Qingbei Li, Jianhua Chen, Flory Zhou, Wilson Zheng
  • Publication number: 20240127990
    Abstract: A metal oxide varistor (MOV) includes an MOV body, a first electrode, a second electrode, and a thermal cut-off insulation shell. The MOV body is a crystalline microstructure with zinc oxide mixed with one or more other metal oxides. The first electrode is adjacent one side of the MOV body and is connected to a first radial lead. The second electrode is adjacent a second side of the MOV body and is connected to a second radial lead having a curved portion. The thermal cut-off insulation shell is adjacent the second electrode and has a protrusion, with the curved portion of the second radial lead being adjacent the protrusion.
    Type: Application
    Filed: October 13, 2023
    Publication date: April 18, 2024
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Hailang Tang, Dongjian Song, Charles Hu
  • Publication number: 20240112836
    Abstract: A metal oxide varistor (MOV) includes an MOV body, a first electrode, a second electrode, and a thermal cut-off (TCO). The MOV body is a crystalline microstructure with zinc oxide mixed with one or more metal oxides. The first electrode is adjacent a first side of the MOV body and is connected to a first radial lead. The second electrode is adjacent a second side of the MOV body and is connected to a second radial lead. The TCO is adjacent the second electrode and consists of solder paste with at least one core. The at least one core is a solid at a first temperature and a liquid at a second temperature.
    Type: Application
    Filed: September 29, 2023
    Publication date: April 4, 2024
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Dongjian Song, Charles Hu
  • Publication number: 20240064868
    Abstract: A resistance heater may include a polymer positive temperature coefficient (PPTC) material, arranged in a PPTC body defining a heater main surface. The PPTC material may include a polymer matrix, the polymer matrix defining the PPTC body, and a graphene filler component, disposed in the polymer matrix. The resistance heater may include an electrode assembly, comprising a first electrode and a second electrode arranged in contact with the heater body at two or more locations, a first lead, connected to the first electrode, and a second lead, connected to the second electrode. As such, the electrode assembly may define a current path between the first lead and the second lead, the current path comprising a first portion, extending along the heater main surface, and a second portion, extending through the heater body.
    Type: Application
    Filed: December 28, 2020
    Publication date: February 22, 2024
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Jianhua CHEN, Zhiyong ZHOU, Yingsong FU
  • Patent number: 11881337
    Abstract: A novel polymer positive temperature coefficient (PPTC) material, device, and method of fabrication. One example of polymer positive temperature coefficient (PPTC) includes a polymer matrix, the polymer matrix comprising a first polymer. The PPTC material may further include a conductive filler, disposed in the polymer matrix; and at least one polymer filler, dispersed within the polymer matrix. The at least one polymer filler may comprise a second polymer, different from the first polymer, wherein the at least one polymer comprises a first melting temperature, and wherein the second polymer comprises a second melting temperature, the second melting temperature exceeding the first melting temperature by at least 20 C.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: January 23, 2024
    Assignee: Littelfuse Electronics (Shanghai) Co., Ltd.
    Inventors: Jianhua Chen, Chun-Kwan Tsang, Zhiyong Zhou, Yingsong Fu, Edward W. Rutter, Jr.
  • Publication number: 20230395342
    Abstract: Thermal Cut-Off (TCO) devices suitable for surface mount reflow processes are disclosed. The TCO devices are modeled after existing lead attached TCO device structures, but are improved with compact and miniaturized structures suitable for surface mount reflow operations. The arm and base terminals include pads for surface mount reflow. The base molds are designed for receiving the PTC device, bimetal device, and arm terminal feature and may operate using either a single base terminal or a multi-part base terminal. Multiple cover designs are disclosed to lower the heat capacity of the upper plate of the TCO device relative to the base terminal. A TCO device featuring an integrated arm and bimetal device terminal is also disclosed, with an updated base portion to support the integrated terminal.
    Type: Application
    Filed: November 6, 2020
    Publication date: December 7, 2023
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Werner Johler, Cheng HU, Jianming BU, Kevin Liang
  • Patent number: 11823821
    Abstract: The present invention relates to a polymer voltage-dependent resistor (PVDR) in various physical forms and methods for manufacturing the varistor. The body of the PVDR is composed of a polymer matrix having a filler composed of doped zinc oxide particles, other semi conductive particles or metal particles uniformly distributed therein. Conductive electrodes may be affixed to the polymer matrix and electrical leads attached to the electrodes.
    Type: Grant
    Filed: November 15, 2022
    Date of Patent: November 21, 2023
    Assignee: Dongguan Littelfuse Electronics Company Limited
    Inventors: Chun-Kwan Tsang, Jianhua Chen, Yi-Hua Deng
  • Publication number: 20230245803
    Abstract: A surge protection device includes a metal terminal and a spring. The metal terminal is located between two metal oxide varistors, where the metal terminal extends beyond the metal oxide varistors. The spring has a flat surface that is connected to the metal terminal using a soldering paste. The flat surface has a bend on one end which forms a gap between the flat surface and the metal terminal.
    Type: Application
    Filed: January 25, 2023
    Publication date: August 3, 2023
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: DONGJIAN SONG, JOHNSON SHEN, YANJING XIAO
  • Publication number: 20230170113
    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.
    Type: Application
    Filed: November 29, 2022
    Publication date: June 1, 2023
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Mingxi Xu, Hiker Cai
  • Publication number: 20230085845
    Abstract: A flat spring (100) is disclosed, for use in a surge protection device (SPD) such as a fast activation thermal fuse, to be integrated with a thermal metal oxide varistor (TMOV). The flat spring (100) has a V-shaped protrusion (110) to enable ultra-high short circuit current protection under overvoltage condition.
    Type: Application
    Filed: May 11, 2020
    Publication date: March 23, 2023
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Long Min, Libing LU, Dongjian Song
  • Publication number: 20230076752
    Abstract: The present invention relates to a polymer voltage-dependent resistor (PVDR) in various physical forms and methods for manufacturing the varistor. The body of the PVDR is composed of a polymer matrix having a filler composed of doped zinc oxide particles, other semi conductive particles or metal particles uniformly distributed therein. Conductive electrodes may be affixed to the polymer matrix and electrical leads attached to the electrodes.
    Type: Application
    Filed: November 15, 2022
    Publication date: March 9, 2023
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Chun-Kwan Tsang, Jianhua Chen, Yi-hua Deng
  • Publication number: 20230010623
    Abstract: Disclosed are various pallet assemblies for arc spray applications. In some embodiments, an assembly may include a top frame comprising a plurality of recesses each operable to receive an electronic device, and a bottom frame coupled to the top frame, wherein the bottom frame comprises a plurality of support structures, and wherein each support structure of the plurality of support structures is aligned with a corresponding recess of the plurality of recesses. The assembly may further include a mechanical device coupled to the top frame and the bottom frame, wherein the mechanical device is operable to bias the top frame and the bottom frame relative to one another.
    Type: Application
    Filed: July 6, 2022
    Publication date: January 12, 2023
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Werner Johler, Dongjian Song, Libing LU
  • Publication number: 20220305522
    Abstract: A spray coating protection method for electronic devices during metallic particle deposition via spraying is disclosed. The spray coating protection method enables selectivity over the size and location of particle deposition. The spray coating protection method is easy for an automation application, in which multiple electronic devices are processed simultaneously, and is suitable for electronic devices of different shapes and sizes. The spray coating protection method provides resistance to high temperature and high pressure during the spraying operation. The spray coating protection method utilizes masking paper, but additional film materials may be used, both to increase the protective strength of the mask and to enable easy placement and subsequent peel off of the masking paper following the spraying process. The masking paper may be made using a die cutting process and is easily placed onto the electronic device surface to ensure zero contamination from hot and high pressure spray particles.
    Type: Application
    Filed: May 26, 2022
    Publication date: September 29, 2022
    Applicant: Dongguan Littelfuse Electronics Company Limited
    Inventors: Dongjian SONG, Liang GU, Werner Johler
  • Patent number: 11410801
    Abstract: Provided herein are thermally protected varistor (TPV) devices including a varistor body and a terminal assembly directly coupled together. The terminal assembly may include a housing, wherein an opening is provided in a base of the housing. A lead is coupleable with the varistor body via a thermal linking material positioned within the opening of the base, the thermal linking material operable to maintain direct physical contact with the lead when the thermal linking material is below a melting point. The terminal assembly may further include a shield slidable within the housing between a first position and a second position, wherein in the first position the shield is positioned adjacent the thermal linking material, and in the second position the shield is positioned between the lead and the second side of the varistor body. The shield includes a tab for releasably coupling the shield to the housing.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: August 9, 2022
    Assignee: Dongguan Littelfuse Electronics Company Limited
    Inventors: Dongjian Song, Libing Lu