ApplicationNo. 568716 filed on 12/07/1995
US Classes:338/21, Voltage surge-responsive or lightning arrester type338/20, Current and/or voltage (e.g., ballast resistor)338/22RThermistor type
ExaminersPrimary: Walberg, Teresa
Assistant: Easthom, Karl D.
Attorney, Agent or Firm
Foreign Patent References
International ClassH01C 007/10
AbstractAn electrical device in which a first resistive element which is composed of a first electrically non-linear composition is in electrical contact, and preferably in physical and electrical contact, with a second resistive element which is composed of a second composition which has a resistivity of less than 100 ohm-cm. The first composition has a resistivity of more than 109 ohm-cm and contains a first particulate filler. The second composition contains a second particulate filler which (a) is magnetic and electrically conductive, and (b) is aligned in discrete regions in the second polymeric component. The device also contains first and second electrodes which are positioned so that current can flow between the electrodes through the first and second resistive elements. Devices of the invention have relatively low breakdown voltages and can survive high energy fault conditions.