A fuse device and a fuse element having excellent rapid blowout properties and excellent insulation properties after blowout even in a size-reduced fuse device are provided. A fuse element constitutes a current path of a fuse device and blows out due to self-generated heat when a rating-exceeding current flows, a length W in a width direction perpendicular to a conduction direction being greater than a total length L in the conduction direction in the fuse element. In particular, the fuse element includes a low melting point metal layer and a high melting point metal layer, the low melting point metal layer eroding the high melting point metal layer when current flows to cause blowout.

A fuse component configured to provide overcurrent protection for an electric motor comprises a spiral fuse portion and a magnetic core. The spiral fuse portion encloses at least a part of the magnetic core, so that the fuse component is also configured to function as a choke of the electric motor.

A fuse component configured to provide overcurrent protection for an electric motor comprises a spiral fuse portion and a magnetic core. The spiral fuse portion encloses at least a part of the magnetic core, so that the fuse component is also configured to function as a choke of the electric motor.

Provided are trimmed parallel element protection devices. Some protection devices may include a substrate and first and second terminals at opposite ends of the substrate. The protection devices may further include a first fusible and a second fusible element extending between the first and second terminals, wherein at least one of the first and second fusible elements includes a trimmed portion.

An electrical fuse configuration or arrangement includes two contact pieces which are placed on top of each other and between which a metal foam is located. A method for interrupting an electric current by using the electrical fuse configuration includes melting the metal foam at a current value exceeding a predetermined threshold or maximum current value.

An electrical fuse configuration or arrangement includes two contact pieces which are placed on top of each other and between which a metal foam is located. A method for interrupting an electric current by using the electrical fuse configuration includes melting the metal foam at a current value exceeding a predetermined threshold or maximum current value.

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 component (36) configured to provide overcurrent protection for an electric motor (20) comprises a spiral (41) of a plurality of coaxial wire loops (44) and an outer insulating sleeve (39) surrounding at least a portion of the spiral (41). The overcurrent threshold of the fuse component (36) may be adjusted by changing the number of loops in the spiral (41) or the cross-section area of the wire in the spiral (41). The fuse component (41) may also function as an inductor (35) and/or connected to a speed adjustable resistor.

A fuse component (36) configured to provide overcurrent protection for an electric motor (20) comprises a spiral (41) of a plurality of coaxial wire loops (44) and an outer insulating sleeve (39) surrounding at least a portion of the spiral (41). The overcurrent threshold of the fuse component (36) may be adjusted by changing the number of loops in the spiral (41) or the cross-section area of the wire in the spiral (41). The fuse component (41) may also function as an inductor (35) and/or connected to a speed adjustable resistor.

An electrical cartridge fuse including a cylindrical housing, first and second terminals coupled to the cylindrical housing, and a fuse element inside the housing and interconnected between the first and second terminals. The fuse element has a main body having at least five openings formed therein in a single line along a longitudinal axis of the fuse element, a guide element formed on a first end of the main body, and a hanger element formed on the second end of the main body. The cartridge fuse has a package size of about 6×32 mm and a voltage rating of at least 500 VADC, a 20 kA IR Rating, a current rating of 12 A to 30 A and a defined opening time at 100% rated current.