A thermal cutoff at least includes a current-carrying fusible element having two ends connected to a first electrode and a second electrode. The current-carrying fusible element is provided in a closed cavity bounded by a housing having an opening at one end, a cover plate, and a sealant. The thermal cutoff further includes a first lead wire and a second lead wire each wrapped by an insulating sheath. One end of the first lead wire and one end of the second lead wire are electrically connected to the first electrode and the second electrode. The sealant is filled in the opening of the housing, covers an electrical joint between the first lead wire and a first electrode plate and an end of the first lead wire, and also covers an electrical joint between a second electrode plate and the second lead wire and an end of the second lead wire.

A thermal cutoff at least includes a current-carrying fusible element having two ends connected to a first electrode and a second electrode. The current-carrying fusible element is provided in a closed cavity bounded by a housing having an opening at one end, a cover plate, and a sealant. The thermal cutoff further includes a first lead wire and a second lead wire each wrapped by an insulating sheath. One end of the first lead wire and one end of the second lead wire are electrically connected to the first electrode and the second electrode. The sealant is filled in the opening of the housing, covers an electrical joint between the first lead wire and a first electrode plate and an end of the first lead wire, and also covers an electrical joint between a second electrode plate and the second lead wire and an end of the second lead wire.

An electronic device includes an input, an output, a metal fuse, a resistor, a heat control transistor, and a heat controller. The metal fuse is coupled between the input and the output. The resistor is coupled between the metal fuse and the heat control transistor. The heat control transistor is coupled between the resistor and a reference terminal of the electronic device, and the heat controller is configured to control a heater current of the heat control transistor.

An electronic device includes an input, an output, a metal fuse, a resistor, a heat control transistor, and a heat controller. The metal fuse is coupled between the input and the output. The resistor is coupled between the metal fuse and the heat control transistor. The heat control transistor is coupled between the resistor and a reference terminal of the electronic device, and the heat controller is configured to control a heater current of the heat control transistor.

A circuit protection device including a positive temperature coefficient (PTC) device and a backup fuse electrically connected in series with one another, the backup fuse comprising a quantity of solder disposed on a dielectric chip and having a melting temperature that is higher than a trip temperature of the PTC device, wherein the a surface of the dielectric chip exhibits a de-wetting characteristic relative to the solder such that, when the solder is melted, the solder draws away from the surface to create a galvanic opening in the backup fuse.

A circuit protection device including a positive temperature coefficient (PTC) device and a backup fuse electrically connected in series with one another, the backup fuse comprising a quantity of solder disposed on a dielectric chip and having a melting temperature that is higher than a trip temperature of the PTC device, wherein the a surface of the dielectric chip exhibits a de-wetting characteristic relative to the solder such that, when the solder is melted, the solder draws away from the surface to create a galvanic opening in the backup fuse.

The present disclosure provides a multifunctional fuse. The multifunctional fuse includes a fuse element, a pre-charging resistor, and an inner housing. The inner housing is provided with a receiving cavity, the fuse element is received in the receiving cavity, and the pre-charging resistor is wound around an outer side of the inner housing and is in contact with the inner housing. The multifunctional fuse of the present disclosure resolves problems of large volumes and high costs of a pre-charging resistor and a fuse in a high voltage circuit in the related art.

The present disclosure provides a multifunctional fuse. The multifunctional fuse includes a fuse element, a pre-charging resistor, and an inner housing. The inner housing is provided with a receiving cavity, the fuse element is received in the receiving cavity, and the pre-charging resistor is wound around an outer side of the inner housing and is in contact with the inner housing. The multifunctional fuse of the present disclosure resolves problems of large volumes and high costs of a pre-charging resistor and a fuse in a high voltage circuit in the related art.

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.

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.