Patents Assigned to Littelfuse, Inc.
  • Publication number: 20240154402
    Abstract: A temperature sensing tape is provided and can include an insulating support structure and at least one temperature sensing element disposed on the insulating support structure wherein the at least one temperature sensing element can be formed from a single polymer mixture that includes two or more polymers, and wherein each of the two or more polymers can have a respective, different crystallinity point.
    Type: Application
    Filed: November 8, 2023
    Publication date: May 9, 2024
    Applicant: Littelfuse, Inc.
    Inventors: Sergio Fuentes Godinez, Marco Doms, Oluwaseun K. Oyewole, Aalok Bhatt, Francois Perraud, Martin Pineda
  • Patent number: 11978787
    Abstract: A power control switch assembly. The assembly may include a thyristor device, where the thyristor device includes a first device terminal, a second device terminal, and a gate terminal> The assembly may include a negative temperature coefficient (NTC) device, electrically coupled to the gate terminal of the thyristor device on a first end, and electrically coupled to the first device terminal of the thyristor device on a second end, wherein the NTC device is thermally coupled to the thyristor device.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: May 7, 2024
    Assignee: Littelfuse, Inc.
    Inventor: Koichiro Yoshimoto
  • Publication number: 20240131950
    Abstract: An adaptive pre-charge control circuit includes include a high-voltage switch and a control circuit. The high-voltage switch controls the flow of current between an electric battery and a DC link capacitor, the electric battery to supply power to an electric vehicle. The DC link capacitor is made up of a sum of individual input capacitors of multiple subunits within an electric vehicle. The control circuit sends a PWM signal to the high-voltage switch based on a difference between an electric battery voltage and a DC link capacitor voltage.
    Type: Application
    Filed: October 23, 2022
    Publication date: April 25, 2024
    Applicant: Littelfuse, Inc.
    Inventors: MICHAEL J. GAMBUZZA, CESAR MARTINEZ, MARTIN SCHULZ
  • Publication number: 20240112977
    Abstract: An isolated packaging structure and methods thereof. The structure includes a housing having a top side and a bottom side. The housing encapsulates one or more electronic components. The structure also include one or more openings disposed in the bottom side of the housing. One or more openings are configured for exposing one or more metallized surfaces of one or more electronic components. One or more metallized surfaces are configured for coupling to one or more lead terminals.
    Type: Application
    Filed: September 29, 2022
    Publication date: April 4, 2024
    Applicant: Littelfuse, Inc.
    Inventor: Rhodri Hughes
  • Patent number: 11948878
    Abstract: A semiconductor device substrate assembly may include a first substrate, comprising: a first insulator plate; and a first patterned metal layer, disposed on the first insulator plate, wherein the first insulator plate comprises a first material and a first thickness. The assembly may include a second substrate, comprising: a second insulator plate; and a second patterned metal layer, disposed on the second insulator plate, wherein the second insulator plate comprises the first material and the first thickness. The assembly may also include a third substrate, disposed between the first substrate and the second substrate, comprising: a third insulator plate; and a third patterned metal layer, disposed on the third insulator plate, wherein the third insulator plate comprises a second material and a second thickness, wherein at least one of the second material and the second thickness differs from the first material and the first thickness, respectively.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: April 2, 2024
    Assignee: LITTELFUSE, INC.
    Inventor: Stefan Steinhoff
  • Patent number: 11948767
    Abstract: Provided are circuit protection devices. In some embodiments, a protection device may include a set of leads extending though a socket body, wherein the socket body includes a first side opposite a second side, and a third side opposite a fourth side, wherein the third and fourth sides extend between the first and second sides, and wherein the third side includes a thermal vent. The protection device may further include a fusible element surrounding a central shaft, wherein the fusible element is connected with the set of leads.
    Type: Grant
    Filed: September 16, 2022
    Date of Patent: April 2, 2024
    Assignee: Littelfuse, Inc.
    Inventors: Roel Santos Retardo, Conrado Sagun De Leon, Merjaycel Marquinez
  • Publication number: 20240106205
    Abstract: A Power Distribution Unit (PDU) includes a cover and a base. The cover has multiple fastener receptacles and a pair of indentations located along its outer edge. The base has an opening on a short side of the PDU for receiving a cable connector and a window on a long side of the PDU, the window being secured to a second cover. The long side is perpendicular to the short side.
    Type: Application
    Filed: September 27, 2022
    Publication date: March 28, 2024
    Applicant: Littelfuse, Inc.
    Inventors: Andrew Jozwiak, Jesus Roberto Morales
  • Patent number: 11942300
    Abstract: A fuse shield features a cylindrical body, a first cap cover, a second cap cover, and a stop region. The cylindrical body is adapted to be placed over and partially surround a cylindrical fuse. The cylindrical body is sandwiched between the first and second cap covers. The stop region is located on an edge of the first cap cover to limit rotation of the cylindrical fuse to a first degree in one direction on a flat surface.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: March 26, 2024
    Assignee: Littelfuse, Inc.
    Inventors: Sheila Marie Vinas Bayer, Randy Capablanca Servancia, Fernando Isip Arce, Jr., Edwin Canido Aberin, Roel Santos Retardo, Francisco Rivera De Guia, Jr.
  • Publication number: 20240096582
    Abstract: Provided are circuit protection devices. In some embodiments, a protection device may include a set of leads extending though a socket body, wherein the socket body includes a first side opposite a second side, and a third side opposite a fourth side, wherein the third and fourth sides extend between the first and second sides, and wherein the third side includes a thermal vent. The protection device may further include a fusible element surrounding a central shaft, wherein the fusible element is connected with the set of leads.
    Type: Application
    Filed: September 16, 2022
    Publication date: March 21, 2024
    Applicant: Littelfuse, Inc.
    Inventors: Roel Santos Retardo, Conrado Sagun De Leon, Merjaycel Marquinez
  • Publication number: 20240096578
    Abstract: An electrical contactor including a contactor assembly including a housing, an electromagnet coil and an electrically conductive core disposed within the housing, the core being movable relative to the coil under influence of an electromagnetic force produced by the coil, and an electrically conductive bridge connected to a lower end of the core and movable with the core, an interrupter assembly including a base located below the bridge and having a trench formed in a top surface thereof, an input bus bar and an output bus bar disposed on the base on opposing sides of the trench, and a pyrotechnic interrupter disposed within the trench. The pyrotechnic interrupter may include a plunger and pyrotechnic ignitor disposed below the plunger, wherein, when the pyrotechnic ignitor is actuated, the plunger forcibly drives the bridge away from the input bus bar and an output bus bar to break an electrical connection therebetween.
    Type: Application
    Filed: September 20, 2022
    Publication date: March 21, 2024
    Applicant: Littelfuse, Inc.
    Inventors: SVEN LOEFFELBEIN, GEOFF SCHWARTZ
  • Publication number: 20240096581
    Abstract: A method for producing an arc quenching fuse filler including providing a conventional fuse filler material, mixing a binder agent with the conventional fuse filler material, mixing an arc quenching promotor with the conventional fuse filler material and binder agent, and curing the binder agent, whereby granules of the arc quenching promotor are bound to granules of the conventional fuse filler material.
    Type: Application
    Filed: October 26, 2020
    Publication date: March 21, 2024
    Applicant: Littelfuse, Inc.
    Inventors: Chun-Kwan Tsang, Gordon Todd Dietsch, Irma Valeriano Santos
  • Publication number: 20240087832
    Abstract: A fuse holder includes a movable tab, a base, and a cover. A stud is affixed to the movable tab and secures a terminal of a bolt-down fuse. A second stud is affixed to the base and secures a second terminal of the bolt-down fuse. The base has a channel into which the movable tab is slidably inserted. The cover connects to the base and is located over the stud and the second stud.
    Type: Application
    Filed: September 21, 2023
    Publication date: March 14, 2024
    Applicant: Littelfuse, Inc.
    Inventors: Andrew Jozwiak, Jesus Roberto Morales
  • Patent number: 11923162
    Abstract: A fuse includes a stack, a flattened wire, and a terminal. The stack has multiple layers arranged to form steps. The stack has an upper stack with layers of a first size and a lower stack with layers of a second, larger size. The flattened wire is located between the upper stack and the lower stack. The terminal is connected to the flattened wire and includes multiple surfaces to cover the steps at one end of the stack.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: March 5, 2024
    Assignee: LITTELFUSE, INC.
    Inventors: Roel Santos Retardo, Kent Harvey Mercado Berenguel, P-A-Homer II Dela Torre
  • Publication number: 20240047164
    Abstract: A fuse includes multiple stacked layers, a first terminal, and a second terminal. The first terminal is connected to one end of a fusible element and the second terminal is connected to the other end. The stacked layers include first and second intermediate layers and a special layer. The first intermediate layer, which has a centrally disposed opening, is stacked on the first terminal and the second terminal. The second intermediate layer, also having a centrally disposed opening is stacked above the first intermediate layer, and the centrally disposed openings define a chamber above the fusible element. The special layer is located between the first intermediate layer and the second intermediate layer and includes one or more geometric elements. The geometric elements divide the chamber into two sub-chambers, the first sub-chamber being above the second sub-chamber.
    Type: Application
    Filed: August 3, 2022
    Publication date: February 8, 2024
    Applicant: Littelfuse, Inc.
    Inventor: Clemente Hernandez Murillo
  • Patent number: 11892525
    Abstract: A magnetic sensing system includes a sensor and three magnets. The sensor is located within an appliance housing, the appliance having three moving components. The first magnet is disposed in a first orientation adjacent the first moving component, with the position of the first magnet changing in concert with movement of the first moving component. The second magnet is disposed in a second orientation adjacent the second moving component, with the position of the second magnet changing in concert with movement of the second moving component. The third magnet is disposed in a third orientation adjacent the third moving component, with the position of the third magnet changing in concert with movement of the third moving component. The sensor detects displacement of the first moving component, the second moving component, or the third moving component.
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: February 6, 2024
    Assignee: Littelfuse, Inc.
    Inventors: Todd Sabotta, Seong-Jae Lee, Stephen E. Knapp
  • Patent number: 11884247
    Abstract: A rain and temperature sensing module including a housing having a cover plate formed of a transparent material, a printed circuit board disposed within the housing and having a light emitter, a light receiver, and a temperature sensing element disposed thereon, a transparent compound disposed within the housing and covering the light emitter, the light receiver, and the temperature sensing element, the transparent compound filling a space between the printed circuit board and the cover plate, wherein the transparent compound has a refractive index that is substantially equal to a refractive index of the cover plate, and wherein the transparent compound provides a thermally conductive medium between the cover plate and the temperature sensing element.
    Type: Grant
    Filed: April 19, 2023
    Date of Patent: January 30, 2024
    Assignee: Littelfuse, Inc.
    Inventors: Mindaugas Ketlerius, Mangirdas Rasiulis, Paulius Alisauskas
  • Patent number: 11881849
    Abstract: A relay circuit may include a solid state relay switch, coupled to an external voltage line and to an charging capacitor; and a solid state relay control circuit, coupled between the charging capacitor and the solid state relay switch. The solid state relay control circuit may be arranged to: turn the solid state relay switch to an OFF state when a capacitor voltage of the charging capacitor falls below a low threshold value; and change the solid state relay switch from the OFF state to an ON state when the capacitor voltage increases above a high threshold value.
    Type: Grant
    Filed: May 3, 2022
    Date of Patent: January 23, 2024
    Assignee: Littelfuse, Inc.
    Inventor: Bret R. Howe
  • Publication number: 20240021505
    Abstract: A pressure contact assembly includes a power substrate, a chip, and a lead. The power substrate has a surface connected to a ceramic tile and a cavity. The chip is soldered to the surface. The lead is to be inserted into the cavity and has a top portion to connect to an external device and a bottom portion to fit into the cavity.
    Type: Application
    Filed: July 12, 2022
    Publication date: January 18, 2024
    Applicant: Littelfuse, Inc.
    Inventors: TIBURCIO A. MALDO, Rodri Hughes, Robert Ebido, Jeff Grozen, Josef Colquin A. Chua, Domingo Atienza, JR.
  • Publication number: 20240021568
    Abstract: A substrate assembly may include a power substrate, a chip, a clip, and a trimetal. The power substrate has a first direct copper bonded (DCB) surface connected to a ceramic tile. The chip is soldered onto the first DCB surface. The clip is attached to the power substrate and has a foot at one end and a recessed area at the other, opposite end. The foot is connected to the power substrate. The trimetal has a base, a trapezoid structure, and a clip portion. The base is soldered to the chip. The trapezoid structure is located above the base. The clip portion is located above the trapezoid structure and includes a projecting area. The recessed area of the clip fits into the projecting area of the trimetal.
    Type: Application
    Filed: July 14, 2022
    Publication date: January 18, 2024
    Applicant: Littelfuse, Inc.
    Inventors: Tiburcio A. Maldo, Rhodri Hughes, Robert Ebido, Jeff Grozen, Josef Colquin A. Chua, Domingo Atienza, JR.
  • Publication number: 20240021394
    Abstract: An active/passive fuse module including a fuse having an electrically insulating fuse body, first and second endcaps disposed on opposing ends of the fuse body, a fusible element extending through the fuse body between the first endcap and the second endcap, and an arc quenching material disposed within the fuse body and surrounding the fusible element. The fuse module further includes a pyrotechnic interrupter (PI) coupled to the fuse body, the PI having a housing defining a shaft, a piston disposed within the shaft, a drive pin extending from the piston into the fuse body, the drive pin terminating in a cutter disposed adjacent the fusible element, and a pyrotechnic ignitor disposed within the shaft above the piston configured to detonate upon receiving an initiation signal from a controller, whereby the piston and the drive pin are forcibly driven through the shaft causing the cutter to separate the fusible element.
    Type: Application
    Filed: May 16, 2023
    Publication date: January 18, 2024
    Applicant: Littelfuse, Inc.
    Inventors: ENGELBERT HETZMANNSEDER, DEREK LASINI, DAVID ARTHUR BURNS