Carbon film resistor, Physics

MANUFACTURING:

Pure carbon is deposited on ceramic substrate by thermal decomposition of hydrocarbon at 10000C. The sheet resistance of film is controlled by controlling the thickness of the carbon film.

SPECIFICATIONS:

Range of values                                                           1 ohm to 107 ohms

Temperature coefficient of resistance                              -1000pm/0C

Stability                                                                        < 3%

Tolerance                                                                     > 2%

Working voltage                                                            500 volts

Working temperature                                                     -40 to 1200C

APPLICATIONS: These resistors are used in measuring instruments where close tolerances are required. These resistors have better stability compared to carbon composition resistors. Voltage coefficient is small. Temperature coefficient is negative. For small value, size of carbon composition resistor. These resistors have no ability to withstand electrical overloads.


 

 

Posted Date: 7/9/2012 4:26:39 AM | Location : United States







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