A method of assembly of an open-cavity, wire-in-air fuse which provides improved manufacturing yield and fuse reliability, involving coiling, braiding or twisting a fusible element around a sacrificial member during the manufacturing process to provide support for the fusible element to prevent mechanical breakages and necking problems commonly encountered during manufacture.

A high-capacity miniature cartridge fuse is provided. A fuse includes a cylindrical housing, a fusible wire, and first and second deep-drawn ferrules fabricated from aluminum alloy. The aluminum is plated with nickel. The ferrule includes a side wall and an end wall. The side wall surrounds the first or second end of the housing, and has a thickness of approximately 0.50 mm or less. The end wall includes a boss extending toward an interior of the housing, and has a thickness greater than the thickness of the side wall.

A temperature-sensitive pellet type thermal fuse is disclosed. The thermal fuse comprises a metal case (10); a first lead wire (L1) fixedly installed on an open end of the case (10) to be insulated from the case (10) by an insulating bushing (20); a second lead wire (L2) electrically connected to the bottom wall (12) of the case (10); a temperature-sensitive pellet (12) installed inside the case (10); a movable terminal (60) being in contact with the fixed contact point (L2a) of the second lead wire (L2) and with the fixed terminal (40) below a fuse cutoff operation temperature, and being in contact with the case (10) but separated from the fixed contact point (L2a) of the second lead wire (L2) above the fuse cutoff operation temperature; a fixed terminal (40) having a through hole (41) with an inner wall, and being fixed on an inner wall (11) of the case; and the movable terminal (60) having a movable contact element (50) slidably contacting with the inner wall of the through hole (41) of the fixed terminal (40) to electrically connect to the fixed terminal (40).

A temperature-sensitive pellet type thermal fuse is disclosed. The thermal fuse comprises a metal case (10); a first lead wire (L1) fixedly installed on an open end of the case (10) to be insulated from the case (10) by an insulating bushing (20); a second lead wire (L2) electrically connected to the bottom wall (12) of the case (10); a temperature-sensitive pellet (12) installed inside the case (10); a movable terminal (60) being in contact with the fixed contact point (L2a) of the second lead wire (L2) and with the fixed terminal (40) below a fuse cutoff operation temperature, and being in contact with the case (10) but separated from the fixed contact point (L2a) of the second lead wire (L2) above the fuse cutoff operation temperature; a fixed terminal (40) having a through hole (41) with an inner wall, and being fixed on an inner wall (11) of the case; and the movable terminal (60) having a movable contact element (50) slidably contacting with the inner wall of the through hole (41) of the fixed terminal (40) to electrically connect to the fixed terminal (40).

An active/passive fuse module including a base, a busbar disposed on the base and including a fuse element extending over a cavity in a top surface of the base and having a plurality of weak points formed therein, a pyrotechnic interrupter (PI) disposed atop the base and including a piston disposed within a shaft above the fuse element, the piston having an edge with a geometry that corresponds to a geometry of a pattern defined by the weak points in the fuse element, a first pyrotechnic ignitor coupled to a controller and configured to detonate and force the piston through the fuse element upon receiving an initiation signal from the controller, and a second pyrotechnic ignitor coupled to the busbar by a pair of leads and configured to detonate and force the piston through the fuse element upon an increase in voltage across the leads.

An active/passive fuse module including a base, a busbar disposed on the base and including a fuse element extending over a cavity in a top surface of the base and having a plurality of weak points formed therein, a pyrotechnic interrupter (PI) disposed atop the base and including a piston disposed within a shaft above the fuse element, the piston having an edge with a geometry that corresponds to a geometry of a pattern defined by the weak points in the fuse element, a first pyrotechnic ignitor coupled to a controller and configured to detonate and force the piston through the fuse element upon receiving an initiation signal from the controller, and a second pyrotechnic ignitor coupled to the busbar by a pair of leads and configured to detonate and force the piston through the fuse element upon an increase in voltage across the leads.

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.

Current-limiting fuse comprising an electrically insulating housing with walls surrounding an interior space, with a first opening and with a second opening opposite to said first opening, and an integrally formed electrical conductor element extending from a first terminal area outside said housing, across said first opening, across said interior space, across said second opening and to a second terminal area outside said housing, wherein said conductor element comprises a melting section of reduced cross-section, said melting section being located in said interior space and being configured to melt, when a predefined maximum allowable electrical current in the conductor element is exceeded, and wherein a first sealing section of the conductor element seals said first opening and wherein a second sealing section of the conductor element seals said second opening. The invention is further directed to a method of manufacturing the current-limiting fuse.

A fuse element is a fuse element (1) including a flat plate-shaped blowout section (1e) with no through-hole disposed between a first terminal (20a) and a second terminal (20b), in which a width (1d) of the blowout section (1e) has a length equal to or greater than 80% of a width (2d) of each of joining portions joining the first terminal (20a) and the second terminal (20b) to the blowout section (1e). The width (1d) of the blowout section (1e) is preferably a length equal to or greater than 95% of the width (2d) of each of the joining portions.

An electronic assembly contains a circuit board having a current-conducting current path with two mutually spaced-apart current path ends that form an interruption point and a contact clip bridging the interruption point. The contact clip is manufactured without a preload, as a thermal fuse. The contact clip has a multiple bent, open clip loop and a contact limb making contact with both mutually spaced-apart current path ends using solder. The contact clip further has a fixing limb with a limb end seated in a circuit board opening. The limb end of the fixing limb is oversized relative to a circuit board opening, and a deformation being imparted to the contact clip, with an internal preload being generated.