A temperature fuse assembly for a high-power DC circuit is provided. The temperature fuse assembly includes a case extending from a first case end to a second case end and an isolated lead projecting from the second case end. A bushing electrically isolates the isolated lead from the case. A high-gauge wire is electrically connected to the case at a first wire end and electrically connected to the isolated lead at a second wire end. A portion of the high-gauge wire is helically wound about an exterior of the bushing. When a temperature of the temperature fuse assembly exceeds a threshold temperature, the temperature fuse assembly is configured to conduct a DC current of the high-power DC circuit through the high-gauge wire. The high-gauge wire is configured to melt under a load of the DC current and interrupt the high-power DC circuit.

An electronic assembly, has at least one circuit board with conductor tracks, at least one current-limiting arrangement in the form of a thermal predetermined breaking point in at least one of the conductor tracks, and a fire-containment device in the region of the current-limiting arrangement.

A protection device including: (i) a protection component having a first thermal fuse and a resistive body, the resistive body being supplied with a current in an abnormal state to generate heat, the heat activating the first thermal fuse to cut off the current; (ii) a PTC component; and (iii) a second thermal fuse, the second thermal fuse being electrically connected in series to the PTC component, the first thermal fuse of the protection component being electrically connected in parallel to the PTC component and to the second thermal fuse, and the protection component being activated in the abnormal state so that the PTC component trips to generate heat, the heat blowing the second thermal fuse.

A fuse element of a SCP is reliably fusion-cut with a simple circuit configuration to interrupt an electric current. In a power supply equipped with a battery unit, a control circuit (7) is configured to control turning on and off of a switch (6) configured to connect the SCP (3) which is connected in series to a battery unit (1) and is configured to interrupt charge and discharge currents in an abnormal state. Battery unit 1 includes battery cells (2) connected in series to one another. The SCP (3) includes fuse element 4 connected in series to an output end of the battery unit (1), and a heater (5) configured to fusion-cut the fuse element (4). The switch (6) includes switching elements (10) each of which has one terminal connected to the heater (5) and another terminal connected to a corresponding one of different-voltage terminals (11) of the battery unit 1. In control circuit (7), a selection circuit (9) is configured to select, according to the voltage detected by the voltage detection circuit (8), a switching element (10) to be turned on, and the switching element (10) which is turned on connects the battery unit (1) to the heater (5) to fusion-cut the fuse element (4).

Electrical device comprising a body defining a closed inner space, a first electrode, a second electrode and a third electrode, a free end of each electrode opening inside the inner space, the free ends of each electrode being arranged, inside the inner space, apart from one another and opposite the other electrodes, the electrical device being configured to prohibit the current from flowing between the first electrode and the third electrode when the electric current or the electric voltage between the first electrode and the second electrode remains below a predefined threshold value; when the electric current or the electric voltage exceeds the threshold value, allow the current to flow between the first electrode and the third electrode.

A method of manufacturing a control device suitable for use in a vehicle includes providing a housing, a circuit board, and thermal fuse. A first contact of the fuse is soldered at the circuit board at a first solder joint and a second contact is soldered at the circuit board at a second solder joint. During assembly of the circuit board at the housing, an engaging tab of the thermal fuse engages the housing whereby the housing urges the engaging tab and the first contact of the thermal fuse in a direction away from a surface of the circuit board. When the control device is assembled and in use, and when a temperature exceeds a threshold temperature so that the first solder joint at the first contact sufficiently melts, the first contact moves away from the circuit board to break the electrical connection at the first solder joint.

A reflowable thermal fuse including a fuse body, a conductive composite element disposed within the fuse body, first and second conductive terminals connected to the conductive composite element and extending out of the fuse body, a removable barrier covering a surface of the conductive composite element and in electrical communication with the first and second conductive terminals, and a solvent element disposed on the removable barrier and separated from the conductive composite element by the removable barrier, wherein the removable barrier has a fusing temperature that is greater than a reflow temperature of the reflowable thermal fuse.

The invention relates to an overvoltage protection arrangement having: a plurality of planar varistors 2, 21, 22, which are arranged on a first side of a supporting plate 7; at least one gas arrester 10; and at least one thermal disconnection device, which is in close thermal contact with at least one of the varistors. The aforementioned components are surrounded by an outer housing 1, and electrical connection means 6, 61 for soldering to a printed circuit board are also provided on the second side of the supporting plate. The varistors 2, 21, 22 have a parallel stack arrangement, which is delimited on each of two opposing sides by an insulating partition wall 3, 31 which can be attached to the supporting plate. Each partition wall has at least one opening for a varistor terminal (62), each varistor terminal being connected to a thermal disconnection device, which in turn comprises a spring-loaded disconnecting lever (80), the respective disconnecting lever being connected at its first end to the respective varistor terminal by a soldered connection (18) and wherein its second end merges into one of the electrical terminals 6, 61 and penetrates through the supporting plate 7. The thermal disconnection device also has an insulating slide 4, whose free end acts on the disconnecting lever (80), wherein the slide runs in recesses in the respective partition wall 3, 31, and a change in the position of the slide can be seen by means of a viewing opening 8 in the outer housing 1.

Apparatus, systems, and methods for determining a temperature excursion are provided. In one example, a system can comprise a temperature switch component that experiences a temperature excursion associated with a metal alloy of the temperature switch component and one or more electrodes, wherein the temperature excursion is based on a temperature of the metal alloy exceeding a defined threshold value. Additionally, the system can comprise a radio frequency identification tag component that receives a signal, from an external reader device, utilized to determine that the temperature excursion has occurred based on a parameter change, associated with the temperature excursion, from a first parameter to a second parameter different than the first parameter.

A surge protective device (SPD) module includes a module housing, first and second module electrical terminals mounted on the module housing, an overvoltage clamping element electrically connected between the first and second module electrical terminals, and a thermal disconnector mechanism. The thermal disconnector mechanism is positioned in a ready configuration, wherein the overvoltage clamping element is electrically connected with the second module electrical terminal. The thermal disconnector mechanism is repositionable to electrically disconnect the overvoltage clamping element from the second module electrical terminal. The thermal disconnector mechanism includes: an electrode electrically connected to the overvoltage clamping element; a disconnect spring elastically deflected and electrically connected to the electrode in the ready configuration; a solder securing the disconnect spring in electrical connection with the electrode in the ready configuration; and a heat sink member thermally interposed between the electrode and the solder, the heat sink member having a thermal capacity. The solder is meltable in response to overheating of the overvoltage clamping element. The disconnect spring is configured to electrically disconnect the overvoltage clamping element from the second module electrical terminal when the solder is melted. The thermal capacity of the heat sink member buffers and dissipates heat from the overvoltage clamping element to prevent the solder from melting in response to at least some surge currents through the SPD module.