Is this some kind of fuse resistor ?

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  • magneh
    Badcaps Veteran
    • Apr 2014
    • 585
    • Portugal

    #1

    Is this some kind of fuse resistor ?

    Hello guys

    Taking a look at some KNX domotic modules that were toasted due to some kind of electrical failure, I found out 2 weird looking resistors.

    Seem to me like some kind of fuse resistor?
    After diggin a bit seems like a fuse wirewound resistor wafer or whatever that is

    They are very toasted but I think the 5 band colours are RED GOLD BLACK ORANGE ORANGE or the opposite, not sure which is the first band.
    The red band is larger than the 4 others, but I dont have much experience with these components.

    Also one of the orange bands looks like brown due to burning, but on a clear part of it, Im pretty sure it was orange to start

    Some pics attached.

    I think its a 33 ohm fuse resistor wafer as on the second band there should not be a golden color.

    What you guys think?
    Should I try replacing these 2 components or not worth the shot?

    Appreciate any help!
    Best
    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30964
    • Albion

    #2
    MELF packaged resistors i think - turn a light on next time

    Comment

    • redwire
      Badcaps Legend
      • Dec 2010
      • 3900
      • Canada

      #3
      To me looks like a couple MELF 0207 resistors with a solder bridge between them. Some Vishay have a brown body, others blue MMB series.

      Comment

      • magneh
        Badcaps Veteran
        • Apr 2014
        • 585
        • Portugal

        #4
        Thank you both!
        Yes MELF 0207

        What about the color band.
        The red one being the thicker band means something? like last band or tolerance band?
        or the reverse?

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30964
          • Albion

          #5
          well the image is dark, but:
          orange,orange,black,gold,red ? maybe?

          so 330 and a divide x10 so 33 and finally red whitch would be 2% tolerance.

          Comment

          • redwire
            Badcaps Legend
            • Dec 2010
            • 3900
            • Canada

            #6
            Vishay 5-band color code
            yes 33Ω 2%

            Comment

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