Component Identification

Discussion in 'Datasheets, Schematics, Manuals and Parts' started by ANavetta, Oct 10, 2017.

  1. ANavetta

    ANavetta

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    This component is from an older programmable power supply, and that first black stripe is throwing me off.
    Any thoughts?
     

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    ANavetta, Oct 10, 2017
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  2. ANavetta

    shrtrnd

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    I'm going to mention this because I've been sucker-punched before by it.
    When resistors over-heat, those painted colors can change on you.
    Looks like Black, Red, Black, Silver, Orange to me,. but having been fooled before, I don't bet on them anymore.
    Can you get an ohmmeter reading across it? It'll be a low-value reading.
    Do you know what it came out of to get the actual value from a schematic?
     
    shrtrnd, Oct 10, 2017
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  3. ANavetta

    ANavetta

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    Unfortunately I do not have a schematic and there does not appear to be one readily available online
    . I do think you are correct on the color bands. The part that makes me a little uneasy is that it is 5 bands, and the first is black. Do I just read that as 0.2 Ohms 1% on the 4 band code and ignore the first 0. Not something I have encountered before.

    Thank you.
     
    ANavetta, Oct 10, 2017
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  4. ANavetta

    davenn Moderator

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    As said above ... the first band may not be black
    I have never in 50 yrs of electronics seen a resistor with a black first band. It's more likely to be a heat discoloured brown band
     
    davenn, Oct 10, 2017
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  5. ANavetta

    kellys_eye

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    Judging by the wire that's used to form the resistive part it's going to be sub-1Ω.

    WHERE in the circuit did this part come from?

    What is the make/model of the PSU anyway? Someone may know the whereabouts of or even have a schematic.
     
    kellys_eye, Oct 10, 2017
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  6. ANavetta

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    It looks like it's gotten very hot, but maybe not so hot as to make it go open circuit.

    If it is open circuit you may be able to expose a part of the wire near the middle of the resistor and measure the resistance to one end (and double it).
     
    (*steve*), Oct 11, 2017
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