The invention relates to an use of a melting conductor (1) for a DC fuse (2) and a high-voltage high-power fuse (2) (HH-DC fuse), wherein the melting conductor (1) comprises an electrically conductive melting wire (3), wherein the melting wire (3) comprises at least two overload narrow sections (4) in the form of a cross-sectional constriction, wherein, preferably between the two immediately successive overload narrow sections (4) a first layer (7) comprising solder and/or surrounding the outer shell surface (6) of the melting wire (3) circumferentially at least in some areas, preferably completely, is provided in at least one first section (5), and wherein a second layer (9) surrounding the outer shell surface (6) of the melting wire (3) circumferentially at least in some areas, preferably completely, is provided adjacent to each of the overload narrow sections (4) in a respective second section (8).

A fuse and a production method therefor. The fuse includes upper and lower insulating layers provided with terminal electrodes, and a fuse element between the upper and lower insulating layers. The fuse further includes a functional layer provided between the fuse element and the insulating layers. The functional layer includes a substrate and an arc extinguishing material uniformly or substantially uniformly distributed in the substrate; the arc extinguishing material includes a sealed cavity; the substrate includes low temperature co-fired ceramic powder, aerosol silicon oxide, silicon oxide, inert resin, phosphoric acid, and phosphate ester polyester; the content of the arc extinguishing material is 1-50 wt %. The fuse overcomes the shortcomings of phenomena such as deformation, bending, and defects occurring to a fuse element caused by the shrinkage mismatch of the fuse element with a buffer layer and an arc extinguishing layer in a sintering process.

A fuse element assembly has been disclosed. The fuse element assembly includes a fuse element having a pair of side edges and at least one weak spot between the side edges. The fuse element assembly also includes an arc-quenching material attached locally to the fuse element adjacent the weak spot.

This protection element (100) has a fuse element (3), an insulating inorganic fibrous material (4) that is disposed in contact with or close to at least a part of the fuse element (3), and a case member (5) configured to enclose a part of the fuse element (3) and the insulating inorganic fibrous material (4).

A fuse element assembly has been disclosed. The fuse element assembly includes a fuse element having a pair of side edges and at least one weak spot between the side edges. The fuse element assembly also includes an arc-quenching material attached locally to the fuse element adjacent the weak spot.

The object of the invention is a fuse for a device to be protected that is connected in series with the fuse, wherein the series connection is connected to a supply network with a first potential and with a second potential that is different from the first, wherein the fuse has a first contact and a second contact, with the second contact being used to electrically contact the device (8) to be protected, wherein the fuse has a fuse element that connects the first contact to the second contact, wherein the fuse also has an additional contact, with the additional contact being arranged so as to be insulated from the first contact and insulated from the second contact and, in an untripped state, is contactless with respect to the fuse element, with the first contact being directly connected to the first potential during operation and with the device to be protected being directly connected to the second potential (N) during operation, with the additional contact also being directly connected to the second potential during operation, and wherein a fourth contact is also provided that makes external triggering available, with triggering resulting in an electric arc that indirectly or directly causes the fuse element to fuse.

A surge protective device with an independent chamber comprising a fuse for overcurrent protection is disclosed. It comprises a first chamber for receiving a voltage sensitive element with a thermal protection switch, and a second chamber independent from the first chamber and provided in the external of the first chamber. The second chamber contains a fuse for power frequency overcurrent protection in series connection with the voltage sensitive element. The surge protection device comprises an independent chamber for power frequency overcurrent protection at outside of the thermal protection device, so as to avoid interference with the components around the fuse. In addition, when the MOV is unexpectedly punctured and got short circuit, the device of the present invention still operates to protect the surge protective surge.

A fuse and a production method therefor. The fuse comprises upper and lower insulating layers (2) provided with end electrodes (4), and a fuse body (1) between the upper and lower insulating layers (2). The fuse further comprises a functional layer (3) provided between the fuse body (1) and the insulating layers (2). The functional layer (3) comprises a base material (32) and an arc extinguishing material (31) uniformly or substantially uniformly distributed in the base material (32); the arc extinguishing material (31) comprises a sealed hole; the base material (32) comprises low-temperature co-fired ceramic powder, aerosol silicon oxide, silicon oxide, inert resin, phosphoric acid, and phosphate ester polyester; the content of the arc extinguishing material (31) is 1-50 wt %. The fuse overcomes the shortcomings in the prior art of phenomena such as deformation, bending, and defects occurring to a fuse body (1) caused by the shrinkage mismatch of the fuse body (1) with a buffer layer and an arc extinguishing layer in a sintering process because there is no support, the flatness, consistency and integrity of the fuse body (1) are ensured, and the fuse characteristics and production efficiency are remarkably improved.

Fuse, comprising at least one fuse blade in which is formed a reduced section (46A) defining a plane (P4) transverse to the fuse blade. The fuse also comprises arc guards, which are made of an elastic material and which are associated in pairs, the arc guards of the same pair being each disposed opposite one another on one respective main side of the same fuse blade. Each arc guard comprises an internal face, oriented towards the fuse blade, a front face, oriented towards the reduced section, and a rear face, oriented away from the reduced section. At least one perforation is made in the fuse blade in the vicinity of the reduced section, each perforation being at least partially closed by the internal faces of the two arc guards of the same pair, each perforation leaving a cavity between the two arc guards of the same pair.

A fuse including a fuse body having a main body portion formed of a dielectric material, a plurality of arc chambers formed in the main body portion, the arc chambers arranged in a matrix configuration, a conductor extending through the main body portion and intersecting the arc chambers, the conductor having bridge portions disposed within the arc chambers, the bridge portions being mechanically weaker than other portions of the conductor and configured to melt and separate upon the occurrence of an overcurrent condition in the fuse.