Embodiments described herein relate generally to a current interrupt device (CID) including a frangible bulb that is configured to be thermally triggered. In some embodiments, the CID includes a breaking contact electrically coupled to a fixed contact and held in electrical contact by the frangible bulb. In some embodiments, the frangible bulb is configured to break at a temperature threshold. In some embodiments, the breaking contact is configured to bend, rotate and/or otherwise deform about a hinge point in order to become electrically disconnected from the fixed contact when the frangible bulb breaks. In some embodiments, opening the electrical circuit between the breaking contact and the fixed contact may prevent overcharging, overvoltage conditions, overcurrent conditions, thermal runaway, and/or other catastrophic failure events.

Disclosed are various protection devices and associated methods. In some embodiments, a protection device may include a fuse assembly having a fusible link extending between a first lead end and a second lead end, and a first lead extending from the first lead end and a second lead extending from the second lead end. The protection device may further include a body including a first section coupleable with a second section, wherein the first and second sections define a central cavity housing the fusible link. The first section may include an interior face operable to engage an opposite interior face of the second section, an engagement member extending away from the interior face towards the second section, and an engagement channel adjacent the engagement member, the engagement channel operable to receive a corresponding engagement member of the second section.

An electrical fuse assembly includes electrically conductive first and second electrodes, and a bimetallic fuse element. The bimetallic fuse element electrically connects the first and second electrodes. The bimetallic fuse element is configured to disintegrate, and thereby disconnect the first electrode from the second electrode, in response to a current exceeding a prescribed trigger current of the bimetallic fuse element for at least a prescribed duration.

Disclosed are various protection devices and associated methods. In some embodiments, a protection device may include a fuse assembly having a fusible link extending between a first lead end and a second lead end, and a first lead extending from the first lead end and a second lead extending from the second lead end. The protection device may further include a body including a first section coupleable with a second section, wherein the first and second sections define a central cavity housing the fusible link. The first section may include an interior face operable to engage an opposite interior face of the second section, an engagement member extending away from the interior face towards the second section, and an engagement channel adjacent the engagement member, the engagement channel operable to receive a corresponding engagement member of the second section.

A thermal protection device, comprising: a first PTC device, arranged in a PTC circuit, and having a first input side, coupled to an input path of the PTC circuit, and having a first output side, coupled to an output path of the PTC circuit; a second PTC device, arranged in the PTC circuit, and having a second input side, coupled to the input path of the PTC circuit, and having a second output side, coupled to the output path of the PTC circuit; and a thermal link having a third input side, coupled to the first output side of the first PTC device and the second output side of the second PTC device, via the output path of the PTC circuit.

Systems, apparatuses, and methods are described for thermal fuse circuit breakers. The thermal fuses described herein may be disposed in a connector, so that, should an overheating condition occur, for example, due to an arc discharge across or inside of the connector, the heat of the arc discharge melts a portion of the fuse, thereby preventing a potentially catastrophic event, such as fire, or damage to a component which may be more expensive than the thermal fuse itself.

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.

The present invention relates to a terminal device for connecting a heating apparatus with an electricity supply, in particular for a tubular heating apparatus for household appliances, wherein the heating apparatus includes at least one electric resistance heating element. The terminal device comprises a mounting and reception section arranged for being electrically connected with the electric resistance heating element of the heating apparatus, a connector section arranged for being electrically connected on its one end side with an electrical power supply and on its other end side with the mounting and reception section, and a thermal fuse unit for detecting an excess temperature of the heating apparatus, which is in heat transfer contact with at least the mounting and reception section and which is connected in the electric supply circuit for supplying the electric resistance heating element of the heating apparatus with electricity. Moreover, the mounting and reception section comprises a cavity for receiving at least the thermal fuse unit.

The invention relates to a surge protection device having a plurality of surge arresters and, in particular thermal, isolating apparatus which is respectively associated with them together with a fault and state display which is designed as a movable, spring force-prestressed displacement element (17) and has a display area and also an operating area for a telecommunications device, wherein tripping of the fault and state display is performed indirectly by means of a blocking element (1, 2, 3) of which the physical state can be changed. According to the invention, a blocking element is provided for each of the surge arresters, which blocking element is in each case arranged so as to block the movement path (4, 5, 6) of a mechanically prestressed wedge slide (7, 8, 9) with a wedge bevel (12). A rocker lever arrangement is also provided which has first lever arms (13, 14, 15) in accordance with the number of wedge slides and at least one second lever arm (16) for blocking, but also for releasing, the displacement element. Those ends of the first lever arms which are remote from the rotation axis (19) of the rocker lever arrangement each have an area (20) for sensing the respective wedge bevel of the respective wedge slide in such a way that, when the movement path of at least one of the wedge slides is cleared, its wedge bevel lifts the relevant first lever arm, as a result of which the second lever arm releases the displacement element.

A thermal cutoff includes a first fusible element, a second fusible element, and a closed cavity bounded by a housing having an open end, a cover plate, and a sealant. The two ends of the first fusible element and the two ends of the second fusible element are connected in parallel to a first electrode and a second electrode, respectively. The first fusible element and the second fusible element are provided in the closed cavity. A direction extending from a closed end to the open end of the housing is defined as a vertical direction. The first fusible element and the second fusible element are vertically arranged. The thermal cutoff has a vertical configuration and thus in its entirety has an elongated shape to meet corresponding application requirements.