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Precision metal film resistors

Discussion in 'Electronic Components' started by Andre Majorel, Feb 2, 2008.

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  1. What is the difference between 0.1% and 1% metal film resistors ?
    Are the higher precision parts made from a different process ?
    Or cherry picked from a big batch of 1% ? Just curious.
  2. Different process looking at some here. They are physically different in
    construction and finish.

    We use 1% or 2% MFR generally, having ditched CFR a few years back. We have a
    few stock 1% for special needs.

  3. Mook Johnson

    Mook Johnson Guest

    I think most are laser etch trimmed to .1%.
  4. Different process, at least in most cases. Compare tempco, load life
    and other stability figures to see. A 1% resistor that happens to be
    within 0.1% will usually not have the stability that many designers
    are looking for.

    Best regards,
    Spehro Pefhany
  5. Thanks everyone that was informative. I had noticed the lower
    tempcos but not the other parameters.
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