Carbon composition resistor, Physics

MANUFACTURING: These resistors do not require substrate. Resistive material is a mixture of finally ground graphite, filter and resin blander. Filter is usually silica. The mix is then extruded and chopped to require sized. The rods are then sintered either in hydrogen or nitrogen at 1000 to 14000C. Sheet resistance is controlled by changing the quantity of carbon and filter.

     Specifications

    Resistance range                                                             2.7 ohms to 22 mega ohms

    Tolerance                                                                       5% to 10%

    Operating temperature range                                           -550C to 1500C

    Power rating                                                                   1/8W, 1/4W, 1/2W, 1W, 2W

    Working voltage DC                                                        150 V to 750 V

    Capacitance                                                                   0.25 pF

    Inductance                                                                     Nil

Application: These are used in general purpose electronic equipment. These contain higher voltage withstanding capacity as compare to films resistors and have low inductance and capacitance. Their cost is low.

 

Posted Date: 7/9/2012 4:16:27 AM | Location : United States







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