A fuse includes an outer cartridge body, an inner cartridge body provided inside the outer cartridge body, a fuse core provided inside the inner cartridge body, two inner copper bushes provided at and covering two open ends of the outer cartridge body, and two outer copper bushes provided at and covering the two inner copper bushes and two open ends of the outer cartridge body. One end of one inner copper bush is a first open end, and the other end is a first closed end. An end face of the first closed end has a first opening. The first open end of the inner copper bush and the outer cartridge body form an interference fit. An end of the fuse core extends and passes through the first opening, and is fixed to the end face of the first closed end.

A fuse includes an outer cartridge body, an inner cartridge body provided inside the outer cartridge body, a fuse core provided inside the inner cartridge body, two inner copper bushes provided at and covering two open ends of the outer cartridge body, and two outer copper bushes provided at and covering the two inner copper bushes and two open ends of the outer cartridge body. One end of one inner copper bush is a first open end, and the other end is a first closed end. An end face of the first closed end has a first opening. The first open end of the inner copper bush and the outer cartridge body form an interference fit. An end of the fuse core extends and passes through the first opening, and is fixed to the end face of the first closed end.

A fuse element capable of surface-mounting and capable of increased ratings while maintaining high-speed blowout property; and a fuse device using the same. A fuse element blown by self-generated heat caused when a rate-exceeding current flows therethrough constitutes a current path of a fuse device and has a low melting point metal layer and a high melting point metal layer laminated onto the low melting point metal layer; when the current flows therethrough, the low melting point metal layer erodes the high melting point metal layer and blowout occurs.

A fuse element capable of surface-mounting and capable of increased ratings while maintaining high-speed blowout property; and a fuse device using the same. A fuse element blown by self-generated heat caused when a rate-exceeding current flows therethrough constitutes a current path of a fuse device and has a low melting point metal layer and a high melting point metal layer laminated onto the low melting point metal layer; when the current flows therethrough, the low melting point metal layer erodes the high melting point metal layer and blowout occurs.

A fuse element capable of surface-mounting and capable of increased ratings while maintaining high-speed blowout property; and a fuse device using the same. A fuse element blown by self-generated heat caused when a rate-exceeding current flows therethrough constitutes a current path of a fuse device and has a low melting point metal layer and a high melting point metal layer laminated onto the low melting point metal layer; when the current flows therethrough, the low melting point metal layer erodes the high melting point metal layer and blowout occurs.

A kind of fuse, comprising, outer cartridge body with both open ends, inner cartridge body with both open ends and provided inside the said outer cartridge body, fuse core provided inside the said inner cartridge body, left and right inner copper bushes provided at and covering both ends of the said outer cartridge body, left and right outer copper bushes provided at and covering the said inner copper bushes and both ends of the said outer cartridge body; Wherein, one end of the said inner copper bush is the first open end, and the other end is the first closed end, the end face of the said first closed end has the first opening; preferably, the said first open end and the said outer cartridge body form interference fit connect through punching. End of the said fuse core extends and passes through the said first opening, and is preferably fixed to the end face of the said first closed end through spot welding. One end of the said outer copper bush is the open end, the other end is the closed end. Preferably, through pressing, the open end of the said outer copper bush and the said first closed end and/or the said outer cartridge body form interference fit joint.

A kind of fuse, comprising, outer cartridge body with both open ends, inner cartridge body with both open ends and provided inside the said outer cartridge body, fuse core provided inside the said inner cartridge body, left and right inner copper bushes provided at and covering both ends of the said outer cartridge body, left and right outer copper bushes provided at and covering the said inner copper bushes and both ends of the said outer cartridge body; Wherein, one end of the said inner copper bush is the first open end, and the other end is the first closed end, the end face of the said first closed end has the first opening; preferably, the said first open end and the said outer cartridge body form interference fit connect through punching. End of the said fuse core extends and passes through the said first opening, and is preferably fixed to the end face of the said first closed end through spot welding. One end of the said outer copper bush is the open end, the other end is the closed end. Preferably, through pressing, the open end of the said outer copper bush and the said first closed end and/or the said outer cartridge body form interference fit joint.

A relay (100) is provided. The relay (100) includes an insulating housing (10) defining an accommodating cavity (11) therein; two binding posts (12) disposed to the insulating housing (10), each having an end extending into the accommodating cavity (11); an insulating plate (20) disposed within the accommodating cavity (11), movable between a first position and a second position, and having two connecting contacts (21) disposed on a first side of the insulating plate (20) facing the binding posts (12); a fuse (30) disposed between the two connecting contacts (21); a mounting base (40) connected to the insulating housing (10); and a push rod (41) movably disposed to the mounting base (40) and connected to the insulating plate (20), in which when the insulating plate (20) is located at the first position, the two connecting contacts (21) abut against the two binding posts (12) respectively, and when the insulating plate (20) is located at the second position, the two connecting contacts (21) detach from the two binding posts (12) respectively.

A relay (100) is provided. The relay (100) includes an insulating housing (10) defining an accommodating cavity (11) therein; two binding posts (12) disposed to the insulating housing (10), each having an end extending into the accommodating cavity (11); an insulating plate (20) disposed within the accommodating cavity (11), movable between a first position and a second position, and having two connecting contacts (21) disposed on a first side of the insulating plate (20) facing the binding posts (12); a fuse (30) disposed between the two connecting contacts (21); a mounting base (40) connected to the insulating housing (10); and a push rod (41) movably disposed to the mounting base (40) and connected to the insulating plate (20), in which when the insulating plate (20) is located at the first position, the two connecting contacts (21) abut against the two binding posts (12) respectively, and when the insulating plate (20) is located at the second position, the two connecting contacts (21) detach from the two binding posts (12) respectively.

Fuse assemblies in the form of fuse blocks and fuse holders include embedded permanent magnet arc suppression features that facilitate higher voltage operation of fusible circuit protection without increasing the size of the fuse assemblies. The embedded magnets apply an external magnetic field upon an overcurrent protection fuse and produce an arc deflection force to enhance arc quenching capability of the fuse without increasing its form factor.