From my 3D printer, is this a capacitor?

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  • CyberCiphers
    Random
    • Jul 2025
    • 6
    • Canada

    #1

    From my 3D printer, is this a capacitor?

    Hey there,
    I'm largely still a student and unsure about identifying components like this, anyone have any idea what this is and if I have another one, fairly straight forward to swap out?
    From my Bambu Labs AMS - had connected the wiring incorrectly .. Whoops!

    Cheers!



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  • PeteS in CA
    Badcaps Legend
    • Aug 2005
    • 3581
    • USA, Unsure of Planet

    #2
    Based on the silkscreen reference designator and it having three leads, I think it might have been a TVS diode.
    PeteS in CA

    Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
    ****************************
    To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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    Comment

    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8325
      • Canada

      #3
      Whatever ED1 is for a TVS look at ED2. They are probably the same.

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 31187
        • Albion

        #4
        712
        SOT23 package.
        could be:
        NDS7002A
        V-MOS, 60V, 0.28A, <2Ω(0.5A) N-type Mosfet
        Attached Files

        Comment

        • redwire
          Badcaps Legend
          • Dec 2010
          • 3912
          • Canada

          #5
          Board marking "485" so I would say it is a dual TVS for protecting the RS-485 port. ED1 likely same as ED2 "712"
          Bourns SM712 or Littelfuse SM712 etc.
          If this is the port you wired wrong.

          Comment

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