The present invention provides a protection device including a bimetal component and a PTC component. This protection device includes a resin base, a first terminal, a second terminal, a PTC component, a bimetal component, an arm, an upper plate and a resin cover. A portion of the first terminal configures a first electrode, and a portion of a second terminal configures the second electrode, and the first electrode and the second electrode are exposed outward at the bottom surface of the resin base. In a normal state, the first terminal, the arm and the second terminal are electrically connected in series. When the bimetal component is activated, the first terminal and the arm become electrically cut off while the first terminal, the PTC component, the bimetal component, the arm and the second terminal are electrically connected in series in the mentioned order.

A temperature-dependent switching mechanism is equipped with a bimetal snap-action disc and a spring snap-action disc, which carries a movable contact part, the bimetal snap-action disc and the spring snap-action disc being captively held in an annular frame.

Electrical device comprising a body defining a closed inner space, a first electrode, a second electrode and a third electrode, a free end of each electrode opening inside the inner space, the free ends of each electrode being arranged, inside the inner space, apart from one another and opposite the other electrodes, the electrical device being configured to prohibit the current from flowing between the first electrode and the third electrode when the electric current or the electric voltage between the first electrode and the second electrode remains below a predefined threshold value; when the electric current or the electric voltage exceeds the threshold value, allow the current to flow between the first electrode and the third electrode.

A temperature-dependent switching mechanism for a temperature-dependent switch having a temperature-dependent bimetal disc; a temperature-independent spring disc; an electrically conductive contacting part on which the bimetal disc and the spring disc are captively held; and a retaining ring which has a main body that is made of an electrically conductive material and surrounds a peripheral edge of the spring disc and, as a result, captively holds the spring disc.

A temperature-dependent switch having a first external terminal, a second external terminal and a temperature-dependent switching mechanism. The temperature-dependent switching mechanism comprises a temperature-dependent switching element which is configured to change its geometric shape as a function of its temperature in order to switch the switching mechanism between a closed position, in which the switching mechanism establishes an electrically conductive connection between the first external terminal and the second external terminal, and an open position, in which the switching mechanism disconnects the electrically conductive connection. The temperature-dependent switching mechanism comprises a spring element which is permanently electrically and mechanically connected in series to the temperature-dependent switching element. The temperature-dependent switching mechanism also comprises a connecting component, which is arranged between the spring element and the temperature-dependent switching element and is attached to the spring element and the temperature-dependent switching element.

A miniature safety switch is used in motor vehicle electronics. The miniature safety switch has a housing base, from which a fixed contact arm and a bimetallic contact arm, which has a moving contact and a bimetallic snap disk attached thereto, are led out. A PTC resistor is brought into direct contact with the bimetallic snap disk by a compression spring and is electrically integrated in such a way that, as a result of the heat generated by the PTC resistor, the bimetallic snap disk remains in the open position thereof in the event of triggering.

A temperature-dependent switch having a temperature-dependent switching mechanism and a housing on which first and second stationary contacts are arranged. The temperature-dependent switching mechanism is configured to switch in a temperature-dependent manner between a closed state, in which the switching mechanism establishes an electrically conductive connection between the first and second stationary contacts, and an open state, in which the switching mechanism disconnects the electrically conductive connection. The switching mechanism comprises a carrier body, a spring element, a bimetallic element and a current transfer member. The current transfer member is connected to the bimetallic element by a connecting element other than the carrier body. In the closed state, the current transfer member is pressed against the first and second stationary contacts in order to establish the electrically conductive connection, and in the open state it is lifted off the first and second stationary contacts in order to disconnect the electrically conductive connection.

A thermosensitive actuating unit which uses an alloy containing maganese and of which the contained maganese is less likely to be corroded. Provided is a thermosensitive actuating unit which is constituted to have a thermosensitive actuating element which has a manganese surface and a plating layer which covers the manganese surface.

In a thermal protection circuit with two electrical connection terminals for an electrical device to be protected from overheating and at least one temperature-dependent switch, at least one electronic semiconductor switch for DC voltage is arranged.

In a temperature-dependent switch having a switching mechanism that has a movable contact part which cooperates with a stationary counter contact and is moved by a spring part to which the movable contact part is electrically conductively connected, the switching mechanism produces an electrically conductive connection between the stationary counter contact and a second counter contact in a temperature-dependent manner. The switch is provided with an arc-shielding plate, which has no mechanical function, is arranged on an upper surface of the spring part and covers sections thereof.