Abstract: An arc detection assembly is provided and includes first and second conductors including first and second terminal ends, respectively, which are engageable to form an electrical connection and an arc detection system. The arc detection system includes a fusible link disposed proximate to one of the first and second terminal ends and configured to break in response to an arcing condition between the first and second terminal ends and a monitoring circuit coupled to the fusible link and configured to determine when breakage of the fusible link occurs and to thereby determine that the arcing condition has occurred.

Abstract: A current measurement apparatus configured to quickly block current. The current measurement apparatus includes a first terminal, a second terminal, a resistor interposed in a separated space between the first terminal and the second terminal; a circuit board, a control unit mounted on the circuit board and configured to measure a current flowing in the resistor by using a voltage value between the first terminal and the second terminal and a resistance value of the resistor, and a cutting unit located above or below the resistor and configured to cut the resistor according to a control signal of the control unit.

Abstract: The present disclosure relates to a bypass switch used in a super-high voltage direct current transmission sub-module including a case; a first bus bar; a second bus bar; a fixing contact provided in a hollow part and connected to the first bus bar; a movable contact provided in the hollow part, and connected to the second bus bar so as to come into contact with or be separated from the fixing contact; an insulating cover coupled to the rear surface of the second bus bar, and having an accommodation part therein; a movable part extension rod provided on the accommodation part and coupled to the movable contact; and an actuator provided on the rear part of the insulating cover, and providing power for moving the movable part extension rod.

Abstract: A switching device for fast disconnection of short-circuit currents includes a switching bridge with a movable contacting element and a fixed contacting element. The switching bridge is operable in a closed state, in which the movable contacting element is in contact with the fixed contacting element, and an open state, in which the movable contacting element is spaced apart from the fixed contacting element. The switching device further includes an electromagnetic switching drive with a coil for generating a magnetic field and a magnet anchor, a guide sleeve to guide the movement of the magnet anchor in the magnetic field of the coil, a pyrotechnic propellant charge located in the cavity, and a supporting device for supporting the guide sleeve. The magnet anchor is arranged within the guide sleeve such that a cavity is formed below the magnet anchor.

Abstract: A guiding pull ring member for guiding a unit top contact in a switch assembly into a mounting contact. The guide ring member includes a mounting ring defined in a first plane, a grasping ring coupled to one side of the mounting ring and being defined in a second plane perpendicular to the first plane, and a V-shaped guide piece coupled to the mounting ring at a side opposite from the grasping ring and extending perpendicular to the first plane. The guiding pull ring member has particular application for a solenoid operated vacuum interrupter recloser switch mounted to a utility pole.

Abstract: Electrical switching device are disclosed having a housing with internal component within the housing. The internal components comprise contacts configured to operate, to change the state of the switching device from a closed state, allowing current flow through the switching device to an open state which interrupts current flow through the switching device. A pyrotechnic feature is included that is configured to interact with the internal components to transition the switching device from the closed state to the open state when the pyrotechnic feature is activated. The pyrotechnic feature is configured to trigger in response to levitation between the contacts at elevated current signal flowing through the switching device.

Abstract: A novel temperature-triggered fuse device is configured to be activated at a designer-specified ambient temperature by utilizing wetting force among a pair of wetting material bays and a solder bridge or a solder ball. The solder bridge or the solder ball is typically positioned on top of the pair of wetting material bays separated by an electrically-insulated gap. Preferably, the wetting material bays are at least partly made of gold, nickel, or other elements suitable for generating an increased wetting force to the solder bridge or the solder ball upon increases in ambient temperature. The novel temperature-triggered fuse device can be integrated into various types of integrated circuits (IC's), or can function as a discrete fuse connected to one or more electronic components for robust protection from power surges and/or thermal runaway-related device malfunctions, meltdowns, or explosions. Various methods of producing the temperature-triggered fuse device are also disclosed herein.

Abstract: A fluid-filled hollow optical fiber cell broadly includes a hollow-core optical fiber and a fluid. The optical fiber presents first and second fiber ends and a longitudinal passageway that extends continuously between the fiber ends. The fluid occupies the passageway, with the fiber ends being closed to hermetically seal the fluid within the optical fiber. The first fiber end has a rounded closed shape formed by at least partly melting the first fiber end to form melted fiber material, with the fiber material being permitted to solidify without splicing the first fiber end to another fiber so that the fiber material terminates the passageway at the first fiber end.

Abstract: A breaker includes conductors, each including an elongated flat cut portion, cutting chambers arranged in correspondence with the cut portions, a single cutting member that includes blades to cut the cut portions in the cutting chambers, a gas generator that generates gas to move the cutting member toward the cut portions, and an arc attenuation portion located between the two cut portions that are adjacent to each other. The conductors are located between two devices. Each cut portion is cut to form two separated cutting ends and electrically disconnect the devices. The arc attenuation portion attenuates an arc generated between the two cutting ends of one of the two adjacent cut portions and the two cutting ends of the other cut portion.

Abstract: A system for decoupling a HV source from an electric vehicle's electrical system is provided that includes (i) at least one electrical contactor, where the HV source is electrically connected to the vehicle's electrical system when the electrical contactor is in a closed state and not electrically connected to the vehicle's electrical system when the electrical contactor is in an open state; (ii) a supplemental restraint system (SRS) that monitors collision data from a plurality of impact sensors and outputs an activation signal in response to monitored collision data; and (iii) a pyrotechnic switch, where the pyrotechnic switch has a pre-activated first state that provides a conductive path that allows the HV source to be electrically connected to the vehicle's electrical system and an activated second state that severs the conductive path and prevents the HV source from being electrically connected to the vehicle's electrical system.

Abstract: A device for protecting an electrical installation from surges. The device includes a protective component for protecting from overvoltages and two thermal disconnectors. Each thermal disconnector includes a respective mobile contact suitable to move from a closed position to an open position to disconnect the protective component from the electrical installation, and a respective thermosensitive element for making the mobile contact move from the closed position to the open position when the temperature of the protective component exceeds a predetermined threshold.

Abstract: To provide a protection element evens the amount of flux on a fusible conductor and improves variations in fusing characteristics. A protection element is provided with: an insulated substrate; a heating body; an insulating member; two electrodes; a heating body internal electrode; a fusible conductor which is stacked over the two electrodes from the heating body internal electrode and fuses a current path between the two electrodes by heating; a flux coated on the fusible conductor so as to superimpose on the heating body; and a cover member attached to the insulated substrate covering at least the fusible conductor. The cover member has a cylindrical protrusion formed on an inner surface of the cover member so as to contact the flux, and a communication hole communicating with the inner surface side of the cover member from the protrusion is opened on a side wall surface of the cover member.

Abstract: A circuit protection device includes a substrate with first and second electrodes connected to the circuit to be protected. The circuit protection device also includes a heater element between the first and second electrodes. A sliding contact is connected by a sensing element to the first electrode, second electrode, and heater element, thereby bridging and providing a conductive path between each. A spring element is held in tension by, and exerts a force parallel to a length of the substrate against, the sliding contact. Upon detection of an activation condition, the sensing element releases the sliding contact and the force exerted by the spring element moves the sliding contact to another location on the substrate at which the sliding contact no longer provides a conductive path between the first electrode, second electrode, and heater element.

Abstract: The restraining strap has a rectangular cross section with a broad side against cylindrical sections holding a release member. The moment of inertia for a rectangular cross section strap is represented by the formula I=BH3/12. The lower moment of inertia reduces the load on the fusible link. With no limit to the number of wraps around the cylindrical sections, higher preloads can be accommodated by increasing the number of wraps of the restraining strap without affecting the moment of inertia or the amount of force borne by the fusible link. The actuator has a catch extending between the restrainer and actuator. The catch ends engage the restrainer and actuator and, upon release from the actuator, the catch rotates to allow the restrainer to unwind from about the cylindrical sections.

Abstract: An actuation system having a configuration of first and second components, each component having longitudinally extending fingers interlaced with one another. Relative longitudinal movement is permitted between the fingers in a manner to permit the second component to be movable longitudinally with respect to the first component between a first position and a second position. A biasing member is provided within the configuration that biases the second component towards the second position. A wire is wound about the fingers that restrains the second component in the first position. A release device selectively causes the wire to be loosened about the fingers such that the biasing member moves the second component from the first position to the second position. An actuator connected to the second component moves with the second component from the first position to the second position.

Abstract: A bus bar forming die (1) includes an upstream-side die block (25) configured to shape an upstream-side fuse-element portion (9) of a bus bar (23), a downstream-side die block (27) configured to shape a downstream-side fuse-element portion (15) of the bus bar (23), and a fixation portion die block (29) configured to shape fixation portions (21) of the bus bar (23). The upstream-side die block (25), the downstream-side die block (27), and the fixation portion die block (29) are configured to shape the bus bar (23) while placed in respective predetermined positions. Each of the upstream-side die block (25), the downstream-side die block (27), and the fixation portion die block (29) is replaceable in accordance with an intended shape of the bus bar (23).

Abstract: An explosion-proof and flameproof ejection type safety surge-absorbing module includes a protective member and a surge-absorbing unit. The protective member includes a base and an upper lid coupled with the base. The base has two corresponding partitions extending upwards. The surge-absorbing unit includes a body, two connecting leads, and a resilient metallic plate. The body has two sides defining two electrode surfaces. One of the electrode surfaces is connected with one of the connecting leads. The resilient metallic plate has a first end welded to the electrode surface with a contact component and a second end curved and striding across an outer side of one of the partitions to penetrate through the bottom of the base. When the body of the surge-absorbing unit is overheated due to high temperature caused by a surge, the contact component will melt so the resilient metallic plate is ejected away from the electrode.

Abstract: A thermal trip unit for a circuit breaker having a primary conductive path for conducting a load current is provided. The thermal trip unit comprises a shape memory alloy (SMA) member adapted to change from a first shape to a second shape at a predetermined thermal condition, a holding member coupled electrically in series with the circuit breaker primary conductive path, said holding member arranged to operatively support said SMA member, wherein said SMA member is configured and disposed within the circuit breaker to trigger a trip response of the circuit breaker at said predetermined thermal condition.

Abstract: A deactivation device for disconnecting an electrical energy source from a load includes at least two one-time switches. The one-time switches become inoperative upon switching in response to the presence of a load exceeding a critical value, thereby disconnecting an electrical connection. The one time switches are connected in parallel, and the deactivation device is configured in such a way that, except for a one-time switch, which is provided for disconnecting the energy source from the load and for connecting the energy source to the load, the at least one other one-time switch remains open. In the case of an inoperativeness of the one one-time switch, the at least one other one-time switch is used for disconnecting the energy source from the load and for connecting the energy source to the load.

Abstract: Exemplary embodiments of the present invention are directed to a circuit protection device. A circuit protection device may comprise a housing defining a cavity and a metal oxide varistor (MOV) disposed within the cavity. The circuit protection device may further comprise a first terminal electrically attached at a first end to the MOV by solder and extending outside of the housing at a second end. An arc shield is disposed within the housing between the first end of the first terminal and at least partially over the solder. The circuit protection device may further comprise a spring configured to bias the arc shield against a micro switch having an indicator portion disposed at least partially outside of the housing.

Abstract: A useful lifetime of an energy storage device can be extended by providing a series connection of a battery cell and an self-programming fuse. A plurality of series connections of a battery cell and an self-programming fuse can then be connected in a parallel connection to expand the energy storage capacity of the energy storage device. Each self-programming fuse can be a strip of a metal semiconductor alloy material, which electromigrates when a battery cell is electrically shorted and causes increases in the amount of electrical current therethrough. Thus, each self-programming fuse is a self-programming circuit that opens once the battery cell within the same series connection is shorted.

Abstract: An electronic circuit includes a conductor path on a circuit board, and at least one SMD component, electronic component and/or electromechanical component mounted on the circuit board and connected to the conductor path. A circuit connection is established via a soldered joint and a spring-loaded or stressed springy contact bridge that provides fuse protection. In the event of excessive power dissipation or high temperature, the soldered joint melts or softens and the contact bridge springs open to interrupt the circuit.

Abstract: In an aspect, a battery assembly is adapted to accommodate a plurality of unit cells, the battery assembly has: a unit cell wiring configured to provide at least one connection for the unit cells; a cut-off device having a fuse circuit and a heater circuit, the fuse circuit configured to disconnect the connection by heat produced in the heater circuit; and a power supply wiring configured to supply the heater circuit of the cut-off device with an electric power.

Abstract: A protective device for control electronics of a motor vehicle component, such as a radiator fan drive, has a thermal protection element between the control electronics and a connecting lead frame. The thermal protection element trips when the temperature in the control electronics rises above a threshold temperature value. The thermal protection element has two conductor segments with conductor ends facing each other and forming an interruption point and one connecting end each. The interruption point is bridged by a fluxing agent, the fusion temperature of which is matched to the threshold temperature value. One of the connecting ends of the thermal protection element is connected to a contact of the connecting lead frame and the other connecting end is connected to a contact of the control electronics.

Abstract: Certain aspects are directed to a thermal fuse for preventing overheating of RF devices in a telecommunication system. The RF thermal fuse includes a body, a conductive bolt, and a driving mechanism. The body can be positioned on a transmission line between an RF signal source and an RF device. The conductive bolt is positioned in the body. The conductive bolt has a length sufficient to provide impedance at a point of protection on the transmission line in response to the conductive bolt contacting a live conductor of the transmission line. The impedance is sufficient to reflect a portion of the incident power of an RF signal from the RF source. The driving mechanism can cause the conductive bolt to contact the live conductor in response to a temperature at or near the point of protection exceeding a threshold temperature.

Abstract: An electrical fuse apparatus comprises a conductor element defining an electrically conductive path between respective wire terminals for connecting the fuse apparatus to an electrical circuit. The conductor element includes a first reactive material and at least one ignition point for receiving external energy to initiate an exothermic reaction of the first reactive material with a second reactive material. The reaction generates a quantity of heat sufficient to melt the conductor and break the conductive path. The fuse can be an element in electrical circuits, including power controllers. A method for protecting a system using an exothermic fuse apparatus is also disclosed.

Abstract: A circuit protection device includes a conductive layer which is connected to first and second terminals. A spring is electrically connected to the first and second terminals. When an over-voltage or over-temperature condition occurs within a charging circuit, one or more heat generating resistive elements melts material associated with one or more of the ends of the spring thereby releasing the spring to create an open circuit.

Abstract: A modular by-pass device of an electrical component includes a housing possessing a movable means of sealing, and is equipped with conducting terminals, one of whose ends is connected to one of the terminals of the electrical component circuit, the other end being fastened to the wall of the housing projecting into the interior of the housing and constituting a contact post. An actuator providing transposition between two positions of a control device include a plunger shaft and a spring arranged in the space formed between the plunger shaft and the internal wall of the housing. A trigger includes a retention device of the plunger shaft held in place by a fusible material. A reversing switch includes a contact zone providing electrical continuity between two contact posts of the terminals carried by the housing. The disclosed embodiments finds application more particularly in the isolation and short-circuiting of a battery element, which has become defective.

Abstract: An electric circuit breaker apparatus is used in a vehicle including an electric circuit having a converter and a storage battery. The electric circuit breaker apparatus interrupts power supply from the storage battery to the converter when a collision of the vehicle is detected. The electric circuit breaker apparatus includes a power supply circuit breaker driven by a low explosive type actuator, which is actuated when a collision of the vehicle is detected. Actuation of the power supply circuit breaker interrupts a power supply path connecting a positive terminal of the storage battery to the converter and grounds a portion of the power supply path closer to the converter than the interrupted portion.

Abstract: A power disconnecting device includes: two electrical contacts which are electrically conductively connected to one another via a conductor in a closed state of the conductor; and a holding unit which holds the conductor in the closed state, the conductor being pre-tensioned in the direction of an open position, the two electrical contacts not being electrically conductively connected via the conductor in the open position of the conductor. The holding unit has a thermosensitive element, and a heating element is assigned to thermosensitive element. The thermosensitive element changes its shape upon activation of the heating element, thus resulting in the conductor moving into the open position.

Abstract: Circuit breaker for motor vehicle power lines, having a first planar connection flap, a second connection flap and a connection portion which electrically connects the connection flaps and which forms a desired breaking location. A particularly simple production with low material use can be achieved by the connection flaps and the electrical connection portion closing an explosion chamber of a pyrotechnical igniter in such a manner that the desired breaking location bursts owing to the gas pressure of the pyrotechnical igniter brought about in the event of actuation.

Abstract: A circuit protection device includes a substrate with first and second electrodes connected to the circuit to be protected. The circuit protection device also includes a heater element between the first and second electrodes. A sliding contact is connected by a sensing element to the first electrode, second electrode, and heater element, thereby bridging and providing a conductive path between each. A spring element is held in tension by, and exerts a force parallel to a length of the substrate against, the sliding contact. Upon detection of an activation condition, the sensing element releases the sliding contact and the force exerted by the spring element moves the sliding contact to another location on the substrate at which the sliding contact no longer provides a conductive path between the first electrode, second electrode, and heater element.

Abstract: An appliance assembly includes an appliance and an appliance member. The appliance includes a wall defining a plurality of holes. The appliance member is carried by the appliance. The appliance member includes a housing which includes a snap-fit arrangement coupled with the appliance. The snap-fit arrangement includes a first plurality of ears and a second plurality of ears, the first and second plurality of ears snap-fittingly engaging the plurality of holes.

Abstract: The invention relates to a thermal link (1) for electrical appliances, comprising an insulating part (10) with electrical terminals (11) and contact springs (12) for providing electrical contact between said terminals (11), a fusible material insert (15) that acts as the thermal trip element and a transmission pin (13), which is displaceably mounted in the insulting part (10), one end of which engaging with the fusible material insert (15) and the other end with the contact springs (12). Said link is characterised in that the fusible material insert (15) is situated in a casing (141) that is configured as one piece with the heat transfer plate (14).

Abstract: The invention relates to a circuit breaker for electrical supply lines, particularly power supply lines or battery cables, for motor vehicles, which circuit breaker is comprised of a first connecting element (1), a second connecting element (3) connectable to said first connecting element (1), and a current path whereby in the conducting state of the circuit breaker a current passes between the first connecting element (1) and the second connecting element (3). The technical problem of providing a circuit breaker for electrical supply lines which can be manufactured and advantageously ensures an error-free operation is solved in that a pyrotechnic separating unit (5) is thermally actuatable by Joule heat emitted by at least one of said connecting elements (1, 3) and in that, the connection between the connecting elements (1, 3) can be released by means of the actuated pyrotechnic separating unit (5).

Abstract: A current and temperature overload protection device has a brace, a thermal sensing contact, a solder layer, two ports and two resilient elements. The thermal sensing contact, the solder layer, the two ports and the two resilient elements are mounted on the brace, where each resilient element is bent to connect between respective ports and the thermal solder layer. The current and temperature overload protection device is mounted on a circuit board connected in a circuit loop of the circuit board, and the thermal sensing contact is connected to a heat-generating device. Therefore, the current and temperature overload protection device provides protection to the circuit loop from thermal and current overload issues.

Abstract: A redundant release apparatus having a multi-segment split spool with a central bore adapted to axially restrain a tensioned member. Two tensioned tapes are overlappingly wound around the spool segments thereby preventing radial movement of the spool segments. Overlapping winding design of each of the tapes provide predictable unwinding dynamics upon release. The multiple segments require less radial motion for release of the tensioned member.

Abstract: A temperature switch comprises a material (14) which melts and concomitantly undergoes a change in an electrical characteristic at a predetermined temperature. The temperature switch also includes at least two electrical contacts (10, 12) for detecting the change in the electrical characteristic. The material (14) comprises an organic cation and an anion and is preferably an ionic liquid.

Abstract: An appliance assembly includes an appliance and a thermal assembly. The thermal assembly includes a housing attached to the appliance, a temperature sensing device carried by the housing and electrically coupled with the appliance, and a thermal fuse carried by the housing and electrically coupled with the appliance, the thermal assembly being a modular assembly and thereby configured for being, as a single unit, attached to and detached from the appliance.

Abstract: A electric circuit includes a connection to a current source, an electric load, and a thermal-mechanical fuse which, in the case of failure at an excessive heat emission, interrupts the current supply to the load, which is effectuated by a feeder in which is arranged a spring having two ends, at least one end is soldered to a solder point provided in the feed line. The one solder point is under a mechanical pretension caused by the restoring force of a spring, that separates the solder joint between the spring and the solder point in the feed line, when the solder melts at the solder point.

Abstract: A short-circuit device for the electrical bypass of an electric module has a contact arrangement, which is disposed in a switching chamber. The contact arrangement has an open circuit-breaker setting, in which a current flow via the contact arrangement is interrupted, and a contact setting, in which a current flow via the contact arrangement is made possible. A pyrotechnic drive for transferring the contact arrangement from its circuit breaker setting into its contact setting, enables cost-effective, rapid bypass or short-circuiting, and the provision of a large current carrying capacity simultaneously. The switching chamber is a vacuum switching chamber in which a vacuum prevails.

Abstract: A modular by-pass device of an electrical component includes a housing possessing a movable means of sealing, and is equipped with conducting terminals, one of whose ends is connected to one of the terminals of the electrical component circuit, the other end being fastened to the wall of the housing projecting into the interior of the housing and constituting a contact post. An actuator providing transposition between two positions of a control device include a plunger shaft and a spring arranged in the space formed between the plunger shaft and the internal wall of the housing. A trigger includes a retention device of the plunger shaft held in place by a fusible material. A reversing switch includes a contact zone providing electrical continuity between two contact posts of the terminals carried by the housing. The disclosed embodiments finds application more particularly in the isolation and short-circuiting of a battery element, which has become defective.

Abstract: An electronic assembly includes an electronic circuit on a circuit board. The circuit includes a conductor path on the circuit board, and at least one SMD component, electronic component and/or electromechanical component that is mounted on the circuit board and connected to the conductor path. A circuit connection between any two of the conductor paths and/or the components is established via a soldered joint and a spring-loaded contact bridge. In the event of excessive power dissipation, the soldered joint melts or weakens and the contact bridge opens due to the spring force.

Abstract: A thermal fuse employing a thermosensitive pellet is provided, which exhibits stabilized characteristics in a low operating temperature region. The thermal fuse includes at least a switching movable member, a thermosensitive pellet member, a pair of leads having a first lead portion and a second lead portion, and a metal casing. The thermosensitive pellet member contains a polyolefin wax. The thermosensitive pellet member is housed in the metal casing to which the pair of leads are attached. The switching movable member is operated by deformation associated with softening or melting of the thermosensitive pellet member, to attain a cut-off state between the pair of leads. The thermal fuse employing a thermosensitive pellet is suitable for an operating temperature of 50 to 180° C.

Abstract: A circuit breaker with a first contact sleeve (3, 14), a second contact sleeve (4, 16), an insulating sleeve (5, 18) disposed between the first contact sleeve (3, 14) and the second contact sleeve (4, 16) has a switching piston (6, 20) with at least one contact section (8) and an isolating section (7, 19), which is disposed at the side of the contact section (8), whereby the switching piston (6, 20) is movable between a closed position in which the contact section (8) of switching piston (6, 20) connects the first contact sleeve (3, 14) with the second contact sleeve (4, 16) so as to be electrically conductive, and an open position in which the contact section (8) of the switching piston (6, 20) does not connect the first contact sleeve (3, 14) with the second contact sleeve (4, 16), in which the first contact sleeve (3, 14), second contact sleeve (4, 16) and insulating sleeve (5, 18) is movable.

Abstract: A circuit interruption device for printed wiring boards having a positive expulsion device for removing melted fuse material, plasma and debris from the printed wiring board.

Abstract: A thermal fuse includes an insulating case having a bottom and having an opening provided therein, a fusible alloy provided in the insulating case, a lead conductor having one end connected to the fusible alloy and other end led out from the insulating case through the opening of the insulating case, a flux provided on the fusible alloy, and a sealer for sealing the opening of the insulating case. The volume of a space between the fusible alloy in the insulating case and the sealer is larger than the volume of the flux. Sealing of the fuse is prevented from deteriorating, and the insulating film is prevented from damage even when the thermal fuse is used for breaking a large current at a high voltage.

Abstract: The present invention relates to an unrecoverable line-type temperature sensitive detector having short-circuit fault alarm function, comprises a detecting cable comprising at least two detecting conductors disposed in parallel and a fusible insulation layer, a resistor, and a resistance signal measuring device, wherein the detecting cable further comprises a semiconductor layer, and wherein the semiconductor layer and the fusible insulation layer are disposed between the detecting conductors so as to space the detecting conductors apart. The detector of the present invention may distinguish short-circuit fault from short circuit caused by fire, and thus overcome the disadvantage of not distinguishing short-circuit fault from short-circuit due to fire in the conventional detector. Therefore, the problem of lack of short-circuit fault alarm function in the prior art is resolved. Accordingly, the present invention improves the reliability of unrecoverable line-type temperature sensitive detector.

Abstract: The present disclosure provides high temperature thermal cutoff devices having a high-temperature thermal pellet with a transition temperature of greater than or equal to about 240° C. and comprising at least one organic compound. The pellet is disposed in a housing, which is sealed with a high-temperature seal that provides substantial sealing up to at least the transition temperature. The high-temperature TCO also has a current interruption assembly, which establishes electrical continuity in a first operating condition corresponding to an operating temperature of less than said transition temperature and discontinues electrical continuity when the operating temperature exceeds the transition temperature. Methods of making such high-temperature thermal cut off devices are also provided.

Abstract: A temperature fuse protection device uses a hot melt metal to rivet for connecting two terminals in the circuit that are separated for making the two terminals electrically-connected and the circuit complete. There is a spacing in between the two free ends of the two terminals when no external force is being imposed. When an electric overloading or high circuit temperature event occurs, the hot melt metal would be heated to melt and break, which would then make the free ends of the two terminals to be disconnected, and therefore, the circuit will be at “OFF” status.