A high breaking capacity chip fuse including a bottom insulative layer, a first intermediate insulative layer, a second intermediate insulative layer, and a top insulative layer disposed in a stacked arrangement in the aforementioned order, a fusible element disposed between the first and second intermediate insulative layers and extending between electrically conductive first and second terminals at opposing longitudinal ends of the bottom insulative layer, the first intermediate insulative layer, the second intermediate insulative layer, and the top insulative layer, wherein the first and second intermediate insulative layers are formed of porous ceramic.

A protective element (30) includes an insulating substrate (33), a plurality of electrodes (34) provided on the insulating substrate (33), a fuse element (35) electrically connected to any electrode (34) of the plurality of electrodes (34), and a heat generation element (38) provided on the insulating substrate (33) for heating and fusing the fuse element (35). The fuse element (35) contains a composite metal material in which a first fusible metal (31) and a second fusible metal (32) are stacked, some of a component of the first fusible metal (31) being dissolved at a joint working temperature, the second fusible metal (32) being lower in melt temperature than the first fusible metal (31), at least some of a component of the second fusible metal (32) being molten at the joint working temperature.

A protective element (30) includes an insulating substrate (33), a plurality of electrodes (34) provided on the insulating substrate (33), a fuse element (35) electrically connected to any electrode (34) of the plurality of electrodes (34), and a heat generation element (38) provided on the insulating substrate (33) for heating and fusing the fuse element (35). The fuse element (35) contains a composite metal material in which a first fusible metal (31) and a second fusible metal (32) are stacked, some of a component of the first fusible metal (31) being dissolved at a joint working temperature, the second fusible metal (32) being lower in melt temperature than the first fusible metal (31), at least some of a component of the second fusible metal (32) being molten at the joint working temperature.

A fuse element includes: a low-melting-point metal layer; a high-melting-point metal layer provided over at least one surface of the low-melting-point metal layer; and an intermediate layer disposed between the low-melting-point metal layer and the high-melting-point metal layer. Each of the high-melting-point metal layer and the intermediate layer is made of a metal that is liquefied by contacting a molten form of the low-melting-point metal layer. The high-melting point metal layer is made of silver or an alloy comprising silver as a main component thereof. A melting point of a material constituting the intermediate layer is higher than a melting point of a material constituting the low-melting-point metal layer and lower than a melting point of a material constituting the high-melting-point metal layer.

A fuse element includes: a low-melting-point metal layer; a high-melting-point metal layer provided over at least one surface of the low-melting-point metal layer; and an intermediate layer disposed between the low-melting-point metal layer and the high-melting-point metal layer. Each of the high-melting-point metal layer and the intermediate layer is made of a metal that is liquefied by contacting a molten form of the low-melting-point metal layer. The high-melting point metal layer is made of silver or an alloy comprising silver as a main component thereof. A melting point of a material constituting the intermediate layer is higher than a melting point of a material constituting the low-melting-point metal layer and lower than a melting point of a material constituting the high-melting-point metal layer.

A safety system for a battery-powered fog generator is described, designed to operate on a vaporization coil (2) of a fogging fluid; the safety system includes: a fuse wire (1), each placed at one end of the coil (2), suitable for heating both due to a Joule effect and through heat coming from the coil (2) by thermal conduction, the fusible wire (1) being therefore designed to melt when its temperature exceeds a melting threshold value, interrupting the power supply from the battery to the coil (2); a sensor (6) designed to detect the temperature of the coil (2) when current flows in it; and a control unit (7) operatively connected to the sensor (6).

A safety system for a battery-powered fog generator is described, designed to operate on a vaporization coil (2) of a fogging fluid; the safety system includes: a fuse wire (1), each placed at one end of the coil (2), suitable for heating both due to a Joule effect and through heat coming from the coil (2) by thermal conduction, the fusible wire (1) being therefore designed to melt when its temperature exceeds a melting threshold value, interrupting the power supply from the battery to the coil (2); a sensor (6) designed to detect the temperature of the coil (2) when current flows in it; and a control unit (7) operatively connected to the sensor (6).

A protection element includes a first electrode (1), a second electrode (2) having a spring property, and a fuse element material (3) that is disposed between the first electrode and the second electrode, in which the fuse element material (3) is supported by being interposed between the first electrode (1) and the second electrode (2) in a bent state.

A protection element includes a first electrode (1), a second electrode (2) having a spring property, and a fuse element material (3) that is disposed between the first electrode and the second electrode, in which the fuse element material (3) is supported by being interposed between the first electrode (1) and the second electrode (2) in a bent state.

A protective element includes an insulating substrate, a plurality of electrodes provided on the insulating substrate, a fuse element electrically connected to any electrode of the plurality of electrodes, and a heat generation element provided on the insulating substrate for heating and fusing the fuse element. The fuse element contains a composite metal material in which a first fusible metal and a second fusible metal are stacked, some of a component of the first fusible metal being dissolved at a joint working temperature, the second fusible metal being lower in melt temperature than the first fusible metal, at least some of a component of the second fusible metal being molten at the joint working temperature.