A circuit protection element includes a first leg part formed by being bent once from a first end part of a ceiling part that is the bending reference plane; a second leg part formed by being bent once with respect to the bending reference plane; a first mounting part and a second mounting part each formed by being bent twice with respect to the bending reference plane so as to be flush mutually and parallel to a mounting surface of the circuit board; and a plastic deformation part (a curved part) set in a predetermined region of the second leg part and plastically deformed by applying a load in the vicinity of a second end part of the ceiling part toward the mounting surface of the circuit board.

A temperature-dependent switch having a first electrode, a second electrode, a temperature-dependent switching mechanism, and a housing that accommodates the switching mechanism. The first electrode is connected to a stationary contact that is arranged inside the housing and the switching mechanism comprises a component that is movable relative to the housing, on which movable component a movable contact member is arranged. The switching mechanism is configured to switch, depending on its temperature, between a closed state of the switch and an open state of the switch. A first terminal member is attached to the first electrode by a first welded joint produced by ultrasonic welding and/or a second terminal member is attached to the second electrode by a second welded joint produced by ultrasonic welding and/or the stationary contact is attached to a part of the first electrode arranged inside the housing by a third welded joint produced by ultrasonic welding and/or the movable contact member is fastened to the movable component by a fourth welded joint produced by ultrasonic welding.

A breaker 1 has a fixed piece 2 having a fixed contact 20, a movable piece 4 having a movable contact 41 and pressing the movable contact 41 against the fixed contact 20 to contact therewith, a thermally-actuated element 5 deforming with a change in the temperature so as to shift the movable piece 4 from a conduction state in which the movable contact 41 contacts with the fixed contact 20 to a turn-off state in which the movable contact 41 is separated from the fixed contact 20, a PCT thermistor 6 providing an electrical conduction between the movable piece 4 and the fixed piece 2 when the movable piece 4 is in the above-said turn-off state, and a resin case 10 accommodating the fixed piece 2, the movable piece 4, the thermally-actuated element 5, and the PCT thermistor 6. The fixed piece 2 has a contacting portion 27 contacting with the PCT thermistor 6, and the case 10 has a bottom surface 76 and a concave portion 77 which is recessed from the bottom surface 76 toward the PCT thermistor 6 across the fixed piece 2. In a planar view when the fixed piece 2 is viewed from the PCT thermistor 6, the contacting portion 27 is disposed within the concave portion 77.

An activatable thermal fuse includes a first electrical terminal, a second electrical terminal, and an electrically conductive bridge element having a first electric contact with the first electrical terminal and a second electric contact with the second electrical terminal. At least a part of the bridge element is displaceable from a first position in which the first contact is established to a second position in which the first contact is opened, and a thermally sensitive member releases the part when exposed to a predetermined temperature value. An activating element blocks displacement of the part from the first position, in a first position of the activating element, and enables the displacement of the part in a second position of the activating element. A method of manufacturing a printed circuit board, a method of monitoring, and an electronic circuit including the thermal fuse are also provided.

An electrical mains plug having a body formed of an electrically insulating material is described. Two contact pins are arranged parallel to one another and which project out of the body at a first side thereof, and inside the body are connected or can be connected in each case to an electrical conductor which leads out or can be led out of the body at a second side thereof. The thermal bimetallic element is provided as a temperature sensor, said thermal bimetallic element being a constituent part of the thermal bimetallic switch which is associated with at least one of two contact pins. An electrical connection cable suitable therefor and an electrical device connected thereto are also described.

A breaker has a movable piece which has an elastic part elastically deformable and a moving contact in one end portion of the elastic part, and which presses the moving contact against the fixed contact so that the moving contact contacts with the fixed contact; a thermally-actuated element deforming with a change in the temperature to actuate the movable piece so that the moving contact is separated from the fixed contact; a case housing the movable piece and the thermally-actuated element; and a terminal piece to be connected to an external circuit. The case has a side wall extending along a longitudinal direction of the elastic part. The terminal piece has a protruding portion which protrudes from the side wall toward the outside of the case. The side wall is provided, in its neighboring portion of the protruding portion, with a concave portion which dents inwardly of the case.

A fuse element for an electric circuit, arranged on a circuit board of the electric circuit, has a surface area for fastening and establishing an electric contact on the circuit board, a first deforming area adjacent the surface area, a second deforming area connected to the first deforming area via a central area, the second deforming area including a contact area that abuts the circuit board, and a hook-shaped element insertable into an opening adjacent the contact area, the hook-shaped element is insertable into the opening by elastic deformation of the fuse element in the direction of the circuit board and, after insertion of the hook-shaped element into the opening and positive holding of the hook-shaped element on a lower surface of the circuit board, the first and second deforming areas exert an elastic force on the surface area in the direction away from the circuit board.

A temperature-dependent switch includes a housing with a top face and an outer face that runs transversely to the top face. The switch includes a first outer contact area that is arranged on the top face. The switch includes a second outer contact area that is arranged at the housing. The switch includes a temperature-dependent switching mechanism that is arranged in the housing and configured to establish or open an electrically conductive connection between the first and the second outer contact area depending on a temperature of the switching mechanism. The housing is disposed in a metal mounting cap that includes a wall. An upper rim of the wall protrudes beyond the top face of the housing. An inner side of the wall bears at least partially against the outer face of the housing.

A breaker 1 includes a fixed piece 2 having a fixed contact 21, a movable piece 4 including a movable contact 41 and having the movable contact 41 so as to be pressed against and in contact with the fixed contact 21, a thermally actuated element 5 shifting the movable piece 4 from a conductive state to a cut-off state in accordance with a temperature change, and a case 7 accommodating the fixed piece 2, the movable piece 4, and the thermally actuated element 5. The case 7 includes a case main body 71 accommodating the movable piece 4 and the thermally actuated element 5, a lid member 81 covering a housing concave portion 73 of the case main body 71, and a metal plate 9 embedded in the lid member 81. Heat capacity of the metal plate 9 is larger than heat capacity of the fixed piece 2.

A fuse element comprises a low melting point metal layer, a first high melting point metal layer having a higher melting point than a melting point of the low melting point metal layer, and a restricting portion including a high melting point material having a higher melting point than a melting point of the low melting point metal layer and configured to restrict flow of the low melting point metal or deformation of a layered body constituted by the first high melting point metal layer and the low melting point metal layer.