| 摘要 |
The electrical resistor has a resistor body (3) which is arranged between two contact connections (1, 2). This resistor body contains an element (5) having a PTC behaviour which, below a material-specific temperature, forms an electrically conductive path running between the two contact connections (1, 2). …<??>The resistor is intended to be simple and cost-effective, but nevertheless to be distinguished by a high rated-current carrying capacity and to be protected against local and general overvoltages. …<??>This is achieved in that the resistor body (3) additionally contains a material having a varistor behaviour. The varistor material is connected in parallel with at least one subsection of the electrically conductive path, forming at least one varistor (disc 40), and is brought into internal electrical contact with the part of the PTC material forming the at least one subsection. The parallel connection of the element having the PTC behaviour and the varistor can be implemented both by a microscopic construction and by a macroscopic arrangement. …<IMAGE>… |
