• Glyn Adgie
    3
    On the page describing thick film resistors, it is stated that the resistive element is based on carbon. As far as I know, this is not true for any new components that you can buy. My information is that a metal oxide is used. I have seen Ruthenium oxide mentioned for this application.

    In the days when I regularly bought leaded resistors for general use, I would always use metal oxide types. Only a cheapskate would use carbon film.

    The black colour of the resistor body is nothing to do with a carbon element. The resistive element is protected with a film (glass?), that is coloured black to provide contrast with white text printed on it. I have seen dark green SMD resistors.
  • UnknownEditor
    34
    Glyn

    Grateful for the correction! Not sure where that incorrect data came from. Possibly the Tanqueray bottle...

    Here is a page that shows RuO2 as well:

    http://www.resistorguide.com/thin-and-thick-film/

    We updated the page:

    https://www.microwaves101.com/encyclopedias/thick-film-resistors

    Send corrections any time, and let my know if you want to receive a Microwaves101 gift for your troubles...

    Steve
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