Abstract:
An electrical fuse is provided. The electrical fuse includes a short circuit fusible element and a trigger element connected in series with the short circuit fusible element. The trigger element is chemically activated rather than mechanically activated to interrupt a predefined overload condition with a predetermined time delay.
Abstract:
The invention relates to a melting conductor (1) provided for use for a fuse (2), preferably for a miniature fuse, with an electrically conductive melting wire (3). According to the invention an electrically insulating and/or electrically non-conductive covering (5) surrounding the outer shell surface (4) of the melting wire (3) at least in certain areas, preferably completely, is provided.
Abstract:
Some embodiments include a fuse having a tungsten-containing structure directly contacting an electrically conductive structure. The electrically conductive structure may be a titanium-containing structure. An interface between the tungsten-containing structure and the electrically conductive structure is configured to rupture when current through the interface exceeds a predetermined level. Some embodiments include a method of forming and using a fuse. The fuse is formed to have a tungsten-containing structure directly contacting an electrically conductive structure. An interface between the tungsten-containing structure and the electrically conductive structure is configured to rupture when current through the interface exceeds a predetermined level. Current exceeding the predetermined level is passed through the interface to rupture the interface.
Abstract:
A fuse (1) includes a fuse element (10) having a fusible portion (13) provided between opposed inner edges (11a, 12a) of flat plate portions (11, 12), and an insulating housing (50) covering the inner edge sides of the flat plate portions and the fusible portion in a state in which outer edge (11c, 12c) sides of the flat plate portions are protruded outward from slits at respective end walls (55, 58) of the insulating housing (50). The outer edge sides of the flat plate portions are formed as terminal portions (21, 22) each having a thickness twice as large as the thickness of the flat plate portion, and protrusions (11b, 12b) provided on upper and lower edges of the flat plate portions abut against inner surfaces of the end walls (55, 58) of the insulating housing (50).
Abstract:
Disclosed is a highly durable blade fuse for which a fused site in a narrow section and the rated current are determined in conformity with its design and the temperature of which does not increase greatly when a current flows through it. A blade fuse according to the present invention includes terminal sections (A, B) and a connection section (1), which are made of the same metal base material that is zinc or a zinc alloy. Furthermore, a low-melting-point metal piece (3), made of tin, which has an outer size identical or similar to a width of the connection section (1) is melted and stuck on at least one surface of the connection section (1) outside the fused section (2), and is positioned to partially traverse an edge of the fused section (2) or not to traverse the edge but to be adjacent to the edge.
Abstract:
A fuse link, especially for low voltage, high-breaking-capacity fuses, includes at least one fusible conductor having a soldering substance in a solder depot of a carrier, the solder being tin-based and the carrier being copper-based. The solder contains a tin alloy as an active substance, the tin alloy having two other constituents. The first constituent, which is the larger of the two in weight percent but which is smaller in weight percent than the proportion of the base substance tin, is selected for lowering the fusion temperature of the solder. The second constituent, which is the smaller of the two in weight percent, is a substance which does not dissolve in tin. Crystal nuclei are formed when said substance is cooled from the liquid state to the solid state, creating a fine structure and preventing the structure from becoming coarse under a load.
Abstract:
A method for producing a fuse element having a fusible portion and any other portion which are made of different kinds of metal. The method comprises the steps of boring through-hole in a substrate made of first metal, forming an element plate by fusion-bonding a second metal to the through-hole and integrally stamping a pair of substrate portion made of the first metal and a low-melting-point portion made of the second metal. The second metal is made of a metal whose melting point is lower than that of the first metal. Further, the pair of substrate portion is connected together by the low-melting-point portion so that the fuse element is formed.
Abstract:
The thin film, circuit device is an subminiature overvoltage protection device in a surface mountable configuration for use in printed circuit board or thick film hybrid circuit technology. The surface mountable device (SMD) is designed to protect against electrostatic discharge (ESD) damage to electronic components.The circuit protection device includes three material subassemblies. The first subassembly generally includes a substrate carier, electrodes, and terminal pads for connecting the protection device 60 to a PC board. The second subassembly includes a voltage variable polymer material with non-linear characteristics, and the third subassembly includes a cover coat for protecting other elements of the circuit protection device.
Abstract:
A thin film, surface-mounted fuse which comprises two material subassemblies. The first subassembly comprises a fusible link, its supporting substrate and terminal pads. The second subassembly comprises a protective, photoimageable layer which overlies the fusible link so as to provide protection from impacts and oxidation. The photoimageable layer is a low profile coating.
Abstract:
A thin film surface-mount fuse having two material subassemblies. The first subassembly includes a fusible link, its supporting substrate and terminal pads. The second subassembly includes a protective layer which overlies the fusible link so as to provide protection from impacts and oxidation. The protective layer is preferably made of a polymeric material. The most preferred polymeric material is a polycarbonate adhesive. In addition, the most preferred supporting substrate is an FR-4 epoxy or a polyimide.