Wickmann-werke Gmbh

Manfred Rupalla

Andreas Baus

Stephan Hell

Andr&eacute; J&ouml;llenbeck

Bernd Fr&ouml;chte

Ingeborg Cieplik

The invention relates to a method for producing a protective component, for example a fuse component or a fusing resistor, including a fusible element and a heating element, which are attached as stacking components to the surface of a substrate. The fusible element is configured in such a way that a current flow between its connections is interrupted, if the fusible component is heated, at least in one fusible region, for a predetermined time period to above a predetermined temperature. The fusible element and the heating element are arranged on the substrate in such a way, that heat created by the heating element is transported to the fusible element and the current flow through the heating element exceeds a threshold value for a predetermined time period. During production, the heating element is positioned next to the fusible element, at a predetermined distance from it. A predetermined, local thermal capacitance is set, at least approximately, at the location of the heating element and is coupled to the latter. Alternatively, a predetermined, local thermal capacitance is set at least at one predetermined location between the heating element and the fusible element. The capacitance accumulates part of the heat that is dissipated from the heating element to the fusible element. This produces, at least approximately, a defined time response of the thermal transmission from the heating element to the fusible element.

Method of providing a protective component with an adjusted time characteristic of the thermal transfer from a heating element to a fusible element

An electrical fuse element ( ), which comprises a substrate ( ) with two contacts ( ) arranged on opposite end sides ( ), terminal areas ( ) connected to the contacts and a fusible conductor ( ) electrically connected in a conducting manner to the contacts via the terminal areas, is developed for use in higher voltage ranges, with improved breaking capacity and with low production costs, by the terminal areas ( ) and the fusible conductor ( ) being arranged separated from one another by an insulator ( ) and electrically connected to one another via lead-throughs.

Electrical fuse element

The present invention relates to an electrical fuse element (,) which comprises at least one fusible conductor (,) and a carrier (,). The object is to provide a fuse element (,) for all known tripping characteristics in a cost-effective production technique for the middle and low-current range. Furthermore, by means of a small outer geometry, the fuse element (,) is to be adaptable to modem methods of insertion. The way in which this object is achieved according to the invention is that the carrier (,) consists of a material of poor thermal conduction, in particular of a glass ceramic.

Growing community of inventors

Witten, Germany

Manfred Rupalla